Based on our analysis of 96 years of temperature data near Alton, MO, this area shows a warming trend of approximately +0.2°F per decade. 10 of the last 10 years recorded above-average temperatures, and 2024 was the warmest year on record at +4.5°F above the historical baseline.
Key Climate Facts
Rate of Change
+0.2°F
per decade
Warmest Year
2024
+4.5°F anomaly
Recent Warm Years
10 / 10
above-average years
Decade Shift
+1.9°F
2020s vs 1930s
Compared to the National Average
Alton is warming at roughly the national average rate.
National: +0.20°F/decade
Alton: +0.18°F/decade
Climate Spiral
Each ring represents one year of monthly temperatures. Blue indicates cooler-than-average periods; red indicates warmer. The outward drift over time reveals Alton's long-term warming trend.
Warming Stripes
Each vertical stripe represents one year. The color gradient from blue to red shows how annual temperatures have shifted relative to the historical average.
Temperature Trend
Annual temperature anomalies plotted over time with a linear regression trend line. The slope of +0.18°F per decade quantifies the rate of change.
Temperature by Decade
1930s
+1.57°F
1940s
+0.75°F
1950s
+0.53°F
1960s
-0.27°F
1970s
-0.38°F
1980s
+0.24°F
1990s
+1.09°F
2000s
+1.44°F
2010s
+2.18°F
2020s
+3.49°F
Average temperature anomaly per decade relative to the historical baseline period.
Anomaly Scale
-4.5°F Colder Normal +6.7°F Warmer
Color bounds are set to the 5th and 95th percentile of anomalies to avoid outlier washout.
Monthly Temperature Records
Complete monthly temperature record for Alton, MO. Filter by decade or download as CSV.
Data Sources & Audit
- Station
- nClimGrid 5km Grid Point
- Distance
- 1.4 mi
- Coverage
- 99.1%
- Records
- 1,154
- Range
- 1930-01 – 2026-02
Full Data Audit 1,154 records
| Year | Month | Temp | Baseline | Anomaly | Source | Gap |
|---|---|---|---|---|---|---|
| 1930 | Jan | 25.9°F | 31.1°F | -5.2° | NCLIMGRID | |
| 1930 | Feb | 46.3°F | 36.0°F | +10.3° | NCLIMGRID | |
| 1930 | Mar | 44.5°F | 46.7°F | -2.2° | NCLIMGRID | |
| 1930 | Apr | 60.2°F | 56.4°F | +3.8° | NCLIMGRID | |
| 1930 | May | 64.7°F | 64.4°F | +0.3° | NCLIMGRID | |
| 1930 | Jun | 72.3°F | 72.2°F | +0.1° | NCLIMGRID | |
| 1930 | Jul | 81.0°F | 76.9°F | +4.1° | NCLIMGRID | |
| 1930 | Aug | 76.8°F | 75.0°F | +1.8° | NCLIMGRID | |
| 1930 | Sep | 70.5°F | 68.0°F | +2.5° | NCLIMGRID | |
| 1930 | Oct | 54.5°F | 56.9°F | -2.3° | NCLIMGRID | |
| 1930 | Nov | 46.0°F | 45.0°F | +1.0° | NCLIMGRID | |
| 1930 | Dec | 35.0°F | 35.3°F | -0.3° | NCLIMGRID | |
| 1931 | Jan | 36.2°F | 31.1°F | +5.0° | NCLIMGRID | |
| 1931 | Feb | 42.1°F | 36.0°F | +6.0° | NCLIMGRID | |
| 1931 | Mar | 42.0°F | 46.7°F | -4.8° | NCLIMGRID | |
| 1931 | Apr | 55.3°F | 56.4°F | -1.0° | NCLIMGRID | |
| 1931 | May | 60.5°F | 64.4°F | -3.9° | NCLIMGRID | |
| 1931 | Jun | 74.8°F | 72.2°F | +2.6° | NCLIMGRID | |
| 1931 | Jul | 78.5°F | 76.9°F | +1.6° | NCLIMGRID | |
| 1931 | Aug | 73.7°F | 75.0°F | -1.4° | NCLIMGRID | |
| 1931 | Sep | 73.8°F | 68.0°F | +5.8° | NCLIMGRID | |
| 1931 | Oct | 60.8°F | 56.9°F | +3.9° | NCLIMGRID | |
| 1931 | Nov | 53.1°F | 45.0°F | +8.1° | NCLIMGRID | |
| 1931 | Dec | 44.2°F | 35.3°F | +9.0° | NCLIMGRID | |
| 1932 | Jan | 40.4°F | 31.1°F | +9.3° | NCLIMGRID | |
| 1932 | Feb | 45.5°F | 36.0°F | +9.5° | NCLIMGRID | |
| 1932 | Mar | 43.0°F | 46.7°F | -3.7° | NCLIMGRID | |
| 1932 | Apr | 59.5°F | 56.4°F | +3.1° | NCLIMGRID | |
| 1932 | May | 65.1°F | 64.4°F | +0.8° | NCLIMGRID | |
| 1932 | Jun | 75.4°F | 72.2°F | +3.2° | NCLIMGRID | |
| 1932 | Jul | 80.0°F | 76.9°F | +3.1° | NCLIMGRID | |
| 1932 | Aug | 77.0°F | 75.0°F | +2.0° | NCLIMGRID | |
| 1932 | Sep | 68.6°F | 68.0°F | +0.6° | NCLIMGRID | |
| 1932 | Oct | 55.6°F | 56.9°F | -1.3° | NCLIMGRID | |
| 1932 | Nov | 41.8°F | 45.0°F | -3.2° | NCLIMGRID | |
| 1932 | Dec | 33.9°F | 35.3°F | -1.3° | NCLIMGRID | |
| 1933 | Jan | 42.1°F | 31.1°F | +11.0° | NCLIMGRID | |
| 1933 | Feb | 35.1°F | 36.0°F | -1.0° | NCLIMGRID | |
| 1933 | Mar | 45.1°F | 46.7°F | -1.6° | NCLIMGRID | |
| 1933 | Apr | 56.1°F | 56.4°F | -0.3° | NCLIMGRID | |
| 1933 | May | 67.0°F | 64.4°F | +2.7° | NCLIMGRID | |
| 1933 | Jun | 74.7°F | 72.2°F | +2.5° | NCLIMGRID | |
| 1933 | Jul | 77.8°F | 76.9°F | +0.9° | NCLIMGRID | |
| 1933 | Aug | 74.5°F | 75.0°F | -0.5° | NCLIMGRID | |
| 1933 | Sep | 73.5°F | 68.0°F | +5.5° | NCLIMGRID | |
| 1933 | Oct | 56.3°F | 56.9°F | -0.5° | NCLIMGRID | |
| 1933 | Nov | 47.5°F | 45.0°F | +2.5° | NCLIMGRID | |
| 1933 | Dec | 42.0°F | 35.3°F | +6.7° | NCLIMGRID | |
| 1934 | Jan | 38.3°F | 31.1°F | +7.1° | NCLIMGRID | |
| 1934 | Feb | 33.6°F | 36.0°F | -2.4° | NCLIMGRID | |
| 1934 | Mar | 43.4°F | 46.7°F | -3.3° | NCLIMGRID | |
| 1934 | Apr | 57.6°F | 56.4°F | +1.3° | NCLIMGRID | |
| 1934 | May | 66.2°F | 64.4°F | +1.8° | NCLIMGRID | |
| 1934 | Jun | 77.2°F | 72.2°F | +5.0° | NCLIMGRID | |
| 1934 | Jul | 83.5°F | 76.9°F | +6.6° | NCLIMGRID | |
| 1934 | Aug | 79.4°F | 75.0°F | +4.4° | NCLIMGRID | |
| 1934 | Sep | 65.5°F | 68.0°F | -2.5° | NCLIMGRID | |
| 1934 | Oct | 60.3°F | 56.9°F | +3.4° | NCLIMGRID | |
| 1934 | Nov | 48.5°F | 45.0°F | +3.6° | NCLIMGRID | |
| 1934 | Dec | 33.9°F | 35.3°F | -1.4° | NCLIMGRID | |
| 1935 | Jan | 36.3°F | 31.1°F | +5.2° | NCLIMGRID | |
| 1935 | Feb | 40.1°F | 36.0°F | +4.0° | NCLIMGRID | |
| 1935 | Mar | 52.6°F | 46.7°F | +5.9° | NCLIMGRID | |
| 1935 | Apr | 53.7°F | 56.4°F | -2.7° | NCLIMGRID | |
| 1935 | May | 61.7°F | 64.4°F | -2.7° | NCLIMGRID | |
| 1935 | Jun | 68.6°F | 72.2°F | -3.6° | NCLIMGRID | |
| 1935 | Jul | 78.1°F | 76.9°F | +1.2° | NCLIMGRID | |
| 1935 | Aug | 76.7°F | 75.0°F | +1.7° | NCLIMGRID | |
| 1935 | Sep | 67.3°F | 68.0°F | -0.8° | NCLIMGRID | |
| 1935 | Oct | 57.8°F | 56.9°F | +0.9° | NCLIMGRID | |
| 1935 | Nov | 43.7°F | 45.0°F | -1.3° | NCLIMGRID | |
| 1935 | Dec | 30.8°F | 35.3°F | -4.4° | NCLIMGRID | |
| 1936 | Jan | 28.7°F | 31.1°F | -2.4° | NCLIMGRID | |
| 1936 | Feb | 28.4°F | 36.0°F | -7.7° | NCLIMGRID | |
| 1936 | Mar | 51.2°F | 46.7°F | +4.4° | NCLIMGRID | |
| 1936 | Apr | 53.8°F | 56.4°F | -2.5° | NCLIMGRID | |
| 1936 | May | 67.0°F | 64.4°F | +2.6° | NCLIMGRID | |
| 1936 | Jun | 75.9°F | 72.2°F | +3.7° | NCLIMGRID | |
| 1936 | Jul | 82.0°F | 76.9°F | +5.1° | NCLIMGRID | |
| 1936 | Aug | 81.5°F | 75.0°F | +6.5° | NCLIMGRID | |
| 1936 | Sep | 73.8°F | 68.0°F | +5.8° | NCLIMGRID | |
| 1936 | Oct | 56.2°F | 56.9°F | -0.6° | NCLIMGRID | |
| 1936 | Nov | 42.4°F | 45.0°F | -2.6° | NCLIMGRID | |
| 1936 | Dec | 39.0°F | 35.3°F | +3.8° | NCLIMGRID | |
| 1937 | Jan | 34.3°F | 31.1°F | +3.1° | NCLIMGRID | |
| 1937 | Feb | 36.1°F | 36.0°F | +0.0° | NCLIMGRID | |
| 1937 | Mar | 41.9°F | 46.7°F | -4.8° | NCLIMGRID | |
| 1937 | Apr | 55.6°F | 56.4°F | -0.7° | NCLIMGRID | |
| 1937 | May | 66.4°F | 64.4°F | +2.0° | NCLIMGRID | |
| 1937 | Jun | 73.8°F | 72.2°F | +1.6° | NCLIMGRID | |
| 1937 | Jul | 76.1°F | 76.9°F | -0.8° | NCLIMGRID | |
| 1937 | Aug | 79.4°F | 75.0°F | +4.3° | NCLIMGRID | |
| 1937 | Sep | 68.0°F | 68.0°F | +0.0° | NCLIMGRID | |
| 1937 | Oct | 55.2°F | 56.9°F | -1.7° | NCLIMGRID | |
| 1937 | Nov | 41.8°F | 45.0°F | -3.2° | NCLIMGRID | |
| 1937 | Dec | 33.5°F | 35.3°F | -1.8° | NCLIMGRID | |
| 1938 | Jan | 33.8°F | 31.1°F | +2.7° | NCLIMGRID | |
| 1938 | Feb | 43.9°F | 36.0°F | +7.9° | NCLIMGRID | |
| 1938 | Mar | 54.8°F | 46.7°F | +8.1° | NCLIMGRID | |
| 1938 | Apr | 57.3°F | 56.4°F | +1.0° | NCLIMGRID | |
| 1938 | May | 65.2°F | 64.4°F | +0.9° | NCLIMGRID | |
| 1938 | Jun | 70.6°F | 72.2°F | -1.6° | NCLIMGRID | |
| 1938 | Jul | 77.9°F | 76.9°F | +1.0° | NCLIMGRID | |
| 1938 | Aug | 79.4°F | 75.0°F | +4.3° | NCLIMGRID | |
| 1938 | Sep | 70.3°F | 68.0°F | +2.3° | NCLIMGRID | |
| 1938 | Oct | 60.2°F | 56.9°F | +3.4° | NCLIMGRID | |
| 1938 | Nov | 45.0°F | 45.0°F | +0.1° | NCLIMGRID | |
| 1938 | Dec | 36.7°F | 35.3°F | +1.4° | NCLIMGRID | |
| 1939 | Jan | 39.4°F | 31.1°F | +8.3° | NCLIMGRID | |
| 1939 | Feb | 35.5°F | 36.0°F | -0.5° | NCLIMGRID | |
| 1939 | Mar | 48.5°F | 46.7°F | +1.8° | NCLIMGRID | |
| 1939 | Apr | 53.9°F | 56.4°F | -2.5° | NCLIMGRID | |
| 1939 | May | 65.4°F | 64.4°F | +1.0° | NCLIMGRID | |
| 1939 | Jun | 73.6°F | 72.2°F | +1.4° | NCLIMGRID | |
| 1939 | Jul | 78.1°F | 76.9°F | +1.2° | NCLIMGRID | |
| 1939 | Aug | 75.2°F | 75.0°F | +0.2° | NCLIMGRID | |
| 1939 | Sep | 74.8°F | 68.0°F | +6.8° | NCLIMGRID | |
| 1939 | Oct | 59.6°F | 56.9°F | +2.8° | NCLIMGRID | |
| 1939 | Nov | 42.5°F | 45.0°F | -2.5° | NCLIMGRID | |
| 1939 | Dec | 38.7°F | 35.3°F | +3.5° | NCLIMGRID | |
| 1940 | Jan | 19.6°F | 31.1°F | -11.6° | NCLIMGRID | |
| 1940 | Feb | 35.0°F | 36.0°F | -1.0° | NCLIMGRID | |
| 1940 | Mar | 44.6°F | 46.7°F | -2.1° | NCLIMGRID | |
| 1940 | Apr | 54.7°F | 56.4°F | -1.7° | NCLIMGRID | |
| 1940 | May | 62.1°F | 64.4°F | -2.3° | NCLIMGRID | |
| 1940 | Jun | 72.6°F | 72.2°F | +0.4° | NCLIMGRID | |
| 1940 | Jul | 75.5°F | 76.9°F | -1.4° | NCLIMGRID | |
| 1940 | Aug | 74.7°F | 75.0°F | -0.3° | NCLIMGRID | |
| 1940 | Sep | 67.2°F | 68.0°F | -0.9° | NCLIMGRID | |
| 1940 | Oct | 60.4°F | 56.9°F | +3.6° | NCLIMGRID | |
| 1940 | Nov | 43.1°F | 45.0°F | -1.8° | NCLIMGRID | |
| 1940 | Dec | 39.4°F | 35.3°F | +4.1° | NCLIMGRID | |
| 1941 | Jan | 37.2°F | 31.1°F | +6.0° | NCLIMGRID | |
| 1941 | Feb | 34.2°F | 36.0°F | -1.9° | NCLIMGRID | |
| 1941 | Mar | 41.9°F | 46.7°F | -4.8° | NCLIMGRID | |
| 1941 | Apr | 59.8°F | 56.4°F | +3.4° | NCLIMGRID | |
| 1941 | May | 66.9°F | 64.4°F | +2.6° | NCLIMGRID | |
| 1941 | Jun | 73.3°F | 72.2°F | +1.1° | NCLIMGRID | |
| 1941 | Jul | 79.1°F | 76.9°F | +2.2° | NCLIMGRID | |
| 1941 | Aug | 78.1°F | 75.0°F | +3.1° | NCLIMGRID | |
| 1941 | Sep | 71.7°F | 68.0°F | +3.7° | NCLIMGRID | |
| 1941 | Oct | 62.5°F | 56.9°F | +5.7° | NCLIMGRID | |
| 1941 | Nov | 44.3°F | 45.0°F | -0.7° | NCLIMGRID | |
| 1941 | Dec | 38.9°F | 35.3°F | +3.6° | NCLIMGRID | |
| 1942 | Jan | 31.6°F | 31.1°F | +0.5° | NCLIMGRID | |
| 1942 | Feb | 34.3°F | 36.0°F | -1.8° | NCLIMGRID | |
| 1942 | Mar | 47.9°F | 46.7°F | +1.2° | NCLIMGRID | |
| 1942 | Apr | 58.7°F | 56.4°F | +2.4° | NCLIMGRID | |
| 1942 | May | 64.0°F | 64.4°F | -0.4° | NCLIMGRID | |
| 1942 | Jun | 73.1°F | 72.2°F | +0.9° | NCLIMGRID | |
| 1942 | Jul | 78.4°F | 76.9°F | +1.5° | NCLIMGRID | |
| 1942 | Aug | 74.1°F | 75.0°F | -0.9° | NCLIMGRID | |
| 1942 | Sep | 66.9°F | 68.0°F | -1.2° | NCLIMGRID | |
| 1942 | Oct | 57.7°F | 56.9°F | +0.9° | NCLIMGRID | |
| 1942 | Nov | 48.1°F | 45.0°F | +3.1° | NCLIMGRID | |
| 1942 | Dec | 34.8°F | 35.3°F | -0.4° | NCLIMGRID | |
| 1943 | Jan | 35.8°F | 31.1°F | +4.6° | NCLIMGRID | |
| 1943 | Feb | 40.9°F | 36.0°F | +4.9° | NCLIMGRID | |
| 1943 | Mar | 40.6°F | 46.7°F | -6.2° | NCLIMGRID | |
| 1943 | Apr | 57.7°F | 56.4°F | +1.3° | NCLIMGRID | |
| 1943 | May | 66.7°F | 64.4°F | +2.3° | NCLIMGRID | |
| 1943 | Jun | 75.5°F | 72.2°F | +3.3° | NCLIMGRID | |
| 1943 | Jul | 79.6°F | 76.9°F | +2.7° | NCLIMGRID | |
| 1943 | Aug | 79.2°F | 75.0°F | +4.2° | NCLIMGRID | |
| 1943 | Sep | 66.1°F | 68.0°F | -1.9° | NCLIMGRID | |
| 1943 | Oct | 56.0°F | 56.9°F | -0.9° | NCLIMGRID | |
| 1943 | Nov | 43.4°F | 45.0°F | -1.5° | NCLIMGRID | |
| 1943 | Dec | 32.7°F | 35.3°F | -2.5° | NCLIMGRID | |
| 1944 | Jan | 35.7°F | 31.1°F | +4.5° | NCLIMGRID | |
| 1944 | Feb | 40.9°F | 36.0°F | +4.9° | NCLIMGRID | |
| 1944 | Mar | 44.6°F | 46.7°F | -2.1° | NCLIMGRID | |
| 1944 | Apr | 54.8°F | 56.4°F | -1.5° | NCLIMGRID | |
| 1944 | May | 67.1°F | 64.4°F | +2.7° | NCLIMGRID | |
| 1944 | Jun | 75.5°F | 72.2°F | +3.3° | NCLIMGRID | |
| 1944 | Jul | 77.2°F | 76.9°F | +0.3° | NCLIMGRID | |
| 1944 | Aug | 76.6°F | 75.0°F | +1.6° | NCLIMGRID | |
| 1944 | Sep | 69.2°F | 68.0°F | +1.1° | NCLIMGRID | |
| 1944 | Oct | 58.4°F | 56.9°F | +1.6° | NCLIMGRID | |
| 1944 | Nov | 46.1°F | 45.0°F | +1.2° | NCLIMGRID | |
| 1944 | Dec | 30.7°F | 35.3°F | -4.6° | NCLIMGRID | |
| 1945 | Jan | 32.0°F | 31.1°F | +0.9° | NCLIMGRID | |
| 1945 | Feb | 37.4°F | 36.0°F | +1.3° | NCLIMGRID | |
| 1945 | Mar | 53.7°F | 46.7°F | +7.0° | NCLIMGRID | |
| 1945 | Apr | 57.7°F | 56.4°F | +1.4° | NCLIMGRID | |
| 1945 | May | 61.2°F | 64.4°F | -3.2° | NCLIMGRID | |
| 1945 | Jun | 70.1°F | 72.2°F | -2.1° | NCLIMGRID | |
| 1945 | Jul | 75.0°F | 76.9°F | -1.9° | NCLIMGRID | |
| 1945 | Aug | 76.6°F | 75.0°F | +1.6° | NCLIMGRID | |
| 1945 | Sep | 69.8°F | 68.0°F | +1.8° | NCLIMGRID | |
| 1945 | Oct | 56.3°F | 56.9°F | -0.5° | NCLIMGRID | |
| 1945 | Nov | 46.6°F | 45.0°F | +1.6° | NCLIMGRID | |
| 1945 | Dec | 30.1°F | 35.3°F | -5.1° | NCLIMGRID | |
| 1946 | Jan | 35.0°F | 31.1°F | +3.8° | NCLIMGRID | |
| 1946 | Feb | 40.9°F | 36.0°F | +4.9° | NCLIMGRID | |
| 1946 | Mar | 54.6°F | 46.7°F | +7.9° | NCLIMGRID | |
| 1946 | Apr | 60.5°F | 56.4°F | +4.1° | NCLIMGRID | |
| 1946 | May | 62.2°F | 64.4°F | -2.2° | NCLIMGRID | |
| 1946 | Jun | 72.5°F | 72.2°F | +0.3° | NCLIMGRID | |
| 1946 | Jul | 77.9°F | 76.9°F | +1.0° | NCLIMGRID | |
| 1946 | Aug | 73.8°F | 75.0°F | -1.2° | NCLIMGRID | |
| 1946 | Sep | 66.9°F | 68.0°F | -1.2° | NCLIMGRID | |
| 1946 | Oct | 58.7°F | 56.9°F | +1.9° | NCLIMGRID | |
| 1946 | Nov | 47.7°F | 45.0°F | +2.8° | NCLIMGRID | |
| 1946 | Dec | 41.4°F | 35.3°F | +6.1° | NCLIMGRID | |
| 1947 | Jan | 37.1°F | 31.1°F | +6.0° | NCLIMGRID | |
| 1947 | Feb | 30.4°F | 36.0°F | -5.7° | NCLIMGRID | |
| 1947 | Mar | 39.0°F | 46.7°F | -7.7° | NCLIMGRID | |
| 1947 | Apr | 57.4°F | 56.4°F | +1.1° | NCLIMGRID | |
| 1947 | May | 63.5°F | 64.4°F | -0.9° | NCLIMGRID | |
| 1947 | Jun | 73.0°F | 72.2°F | +0.8° | NCLIMGRID | |
| 1947 | Jul | 73.9°F | 76.9°F | -2.9° | NCLIMGRID | |
| 1947 | Aug | 81.5°F | 75.0°F | +6.5° | NCLIMGRID | |
| 1947 | Sep | 71.0°F | 68.0°F | +3.0° | NCLIMGRID | |
| 1947 | Oct | 63.7°F | 56.9°F | +6.8° | NCLIMGRID | |
| 1947 | Nov | 41.6°F | 45.0°F | -3.3° | NCLIMGRID | |
| 1947 | Dec | 38.0°F | 35.3°F | +2.7° | NCLIMGRID | |
| 1948 | Jan | 27.3°F | 31.1°F | -3.8° | NCLIMGRID | |
| 1948 | Feb | 35.1°F | 36.0°F | -1.0° | NCLIMGRID | |
| 1948 | Mar | 44.7°F | 46.7°F | -2.0° | NCLIMGRID | |
| 1948 | Apr | 61.7°F | 56.4°F | +5.4° | NCLIMGRID | |
| 1948 | May | 63.9°F | 64.4°F | -0.4° | NCLIMGRID | |
| 1948 | Jun | 72.4°F | 72.2°F | +0.2° | NCLIMGRID | |
| 1948 | Jul | 76.5°F | 76.9°F | -0.4° | NCLIMGRID | |
| 1948 | Aug | 75.1°F | 75.0°F | +0.1° | NCLIMGRID | |
| 1948 | Sep | 68.2°F | 68.0°F | +0.2° | NCLIMGRID | |
| 1948 | Oct | 54.6°F | 56.9°F | -2.2° | NCLIMGRID | |
| 1948 | Nov | 46.5°F | 45.0°F | +1.5° | NCLIMGRID | |
| 1948 | Dec | 38.4°F | 35.3°F | +3.2° | NCLIMGRID | |
| 1949 | Jan | 35.3°F | 31.1°F | +4.1° | NCLIMGRID | |
| 1949 | Feb | 39.2°F | 36.0°F | +3.1° | NCLIMGRID | |
| 1949 | Mar | 44.9°F | 46.7°F | -1.8° | NCLIMGRID | |
| 1949 | Apr | 55.9°F | 56.4°F | -0.5° | NCLIMGRID | |
| 1949 | May | 67.7°F | 64.4°F | +3.4° | NCLIMGRID | |
| 1949 | Jun | 74.9°F | 72.2°F | +2.7° | NCLIMGRID | |
| 1949 | Jul | 78.3°F | 76.9°F | +1.4° | NCLIMGRID | |
| 1949 | Aug | 74.0°F | 75.0°F | -1.0° | NCLIMGRID | |
| 1949 | Sep | 62.8°F | 68.0°F | -5.3° | NCLIMGRID | |
| 1949 | Oct | 59.0°F | 56.9°F | +2.1° | NCLIMGRID | |
| 1949 | Nov | 46.4°F | 45.0°F | +1.5° | NCLIMGRID | |
| 1949 | Dec | 39.2°F | 35.3°F | +3.9° | NCLIMGRID | |
| 1950 | Jan | 40.3°F | 31.1°F | +9.2° | NCLIMGRID | |
| 1950 | Feb | 38.3°F | 36.0°F | +2.3° | NCLIMGRID | |
| 1950 | Mar | 42.7°F | 46.7°F | -4.0° | NCLIMGRID | |
| 1950 | Apr | 52.3°F | 56.4°F | -4.1° | NCLIMGRID | |
| 1950 | May | 65.3°F | 64.4°F | +0.9° | NCLIMGRID | |
| 1950 | Jun | 72.5°F | 72.2°F | +0.3° | NCLIMGRID | |
| 1950 | Jul | 73.4°F | 76.9°F | -3.5° | NCLIMGRID | |
| 1950 | Aug | 71.6°F | 75.0°F | -3.4° | NCLIMGRID | |
| 1950 | Sep | 66.4°F | 68.0°F | -1.6° | NCLIMGRID | |
| 1950 | Oct | 62.2°F | 56.9°F | +5.3° | NCLIMGRID | |
| 1950 | Nov | 40.7°F | 45.0°F | -4.2° | NCLIMGRID | |
| 1950 | Dec | 31.5°F | 35.3°F | -3.7° | NCLIMGRID | |
| 1951 | Jan | 33.0°F | 31.1°F | +1.9° | NCLIMGRID | |
| 1951 | Feb | 37.2°F | 36.0°F | +1.2° | NCLIMGRID | |
| 1951 | Mar | 43.8°F | 46.7°F | -2.9° | NCLIMGRID | |
| 1951 | Apr | 52.2°F | 56.4°F | -4.2° | NCLIMGRID | |
| 1951 | May | 64.5°F | 64.4°F | +0.2° | NCLIMGRID | |
| 1951 | Jun | 72.0°F | 72.2°F | -0.2° | NCLIMGRID | |
| 1951 | Jul | 76.7°F | 76.9°F | -0.2° | NCLIMGRID | |
| 1951 | Aug | 76.3°F | 75.0°F | +1.3° | NCLIMGRID | |
| 1951 | Sep | 65.6°F | 68.0°F | -2.5° | NCLIMGRID | |
| 1951 | Oct | 57.6°F | 56.9°F | +0.8° | NCLIMGRID | |
| 1951 | Nov | 38.5°F | 45.0°F | -6.5° | NCLIMGRID | |
| 1951 | Dec | 35.7°F | 35.3°F | +0.4° | NCLIMGRID | |
| 1952 | Jan | 39.5°F | 31.1°F | +8.4° | NCLIMGRID | |
| 1952 | Feb | 41.5°F | 36.0°F | +5.4° | NCLIMGRID | |
| 1952 | Mar | 43.9°F | 46.7°F | -2.8° | NCLIMGRID | |
| 1952 | Apr | 53.3°F | 56.4°F | -3.1° | NCLIMGRID | |
| 1952 | May | 64.1°F | 64.4°F | -0.3° | NCLIMGRID | |
| 1952 | Jun | 79.1°F | 72.2°F | +6.9° | NCLIMGRID | |
| 1952 | Jul | 78.9°F | 76.9°F | +2.0° | NCLIMGRID | |
| 1952 | Aug | 76.5°F | 75.0°F | +1.5° | NCLIMGRID | |
| 1952 | Sep | 66.5°F | 68.0°F | -1.5° | NCLIMGRID | |
| 1952 | Oct | 51.5°F | 56.9°F | -5.4° | NCLIMGRID | |
| 1952 | Nov | 44.5°F | 45.0°F | -0.5° | NCLIMGRID | |
| 1952 | Dec | 36.6°F | 35.3°F | +1.4° | NCLIMGRID | |
| 1953 | Jan | 37.6°F | 31.1°F | +6.4° | NCLIMGRID | |
| 1953 | Feb | 39.7°F | 36.0°F | +3.7° | NCLIMGRID | |
| 1953 | Mar | 49.0°F | 46.7°F | +2.3° | NCLIMGRID | |
| 1953 | Apr | 52.6°F | 56.4°F | -3.8° | NCLIMGRID | |
| 1953 | May | 66.2°F | 64.4°F | +1.8° | NCLIMGRID | |
| 1953 | Jun | 79.5°F | 72.2°F | +7.3° | NCLIMGRID | |
| 1953 | Jul | 78.6°F | 76.9°F | +1.8° | NCLIMGRID | |
| 1953 | Aug | 77.0°F | 75.0°F | +2.0° | NCLIMGRID | |
| 1953 | Sep | 70.3°F | 68.0°F | +2.3° | NCLIMGRID | |
| 1953 | Oct | 58.8°F | 56.9°F | +1.9° | NCLIMGRID | |
| 1953 | Nov | 45.0°F | 45.0°F | +0.0° | NCLIMGRID | |
| 1953 | Dec | 35.3°F | 35.3°F | +0.1° | NCLIMGRID | |
| 1954 | Jan | 33.4°F | 31.1°F | +2.2° | NCLIMGRID | |
| 1954 | Feb | 44.4°F | 36.0°F | +8.3° | NCLIMGRID | |
| 1954 | Mar | 43.8°F | 46.7°F | -2.9° | NCLIMGRID | |
| 1954 | Apr | 63.0°F | 56.4°F | +6.6° | NCLIMGRID | |
| 1954 | May | 60.5°F | 64.4°F | -3.9° | NCLIMGRID | |
| 1954 | Jun | 76.2°F | 72.2°F | +4.0° | NCLIMGRID | |
| 1954 | Jul | 82.0°F | 76.9°F | +5.1° | NCLIMGRID | |
| 1954 | Aug | 80.6°F | 75.0°F | +5.6° | NCLIMGRID | |
| 1954 | Sep | 73.1°F | 68.0°F | +5.1° | NCLIMGRID | |
| 1954 | Oct | 57.6°F | 56.9°F | +0.8° | NCLIMGRID | |
| 1954 | Nov | 45.0°F | 45.0°F | +0.0° | NCLIMGRID | |
| 1954 | Dec | 35.7°F | 35.3°F | +0.5° | NCLIMGRID | |
| 1955 | Jan | 34.7°F | 31.1°F | +3.5° | NCLIMGRID | |
| 1955 | Feb | 36.6°F | 36.0°F | +0.6° | NCLIMGRID | |
| 1955 | Mar | 45.9°F | 46.7°F | -0.8° | NCLIMGRID | |
| 1955 | Apr | 61.3°F | 56.4°F | +4.9° | NCLIMGRID | |
| 1955 | May | 66.3°F | 64.4°F | +1.9° | NCLIMGRID | |
| 1955 | Jun | 67.9°F | 72.2°F | -4.3° | NCLIMGRID | |
| 1955 | Jul | 79.1°F | 76.9°F | +2.2° | NCLIMGRID | |
| 1955 | Aug | 76.5°F | 75.0°F | +1.5° | NCLIMGRID | |
| 1955 | Sep | 71.3°F | 68.0°F | +3.2° | NCLIMGRID | |
| 1955 | Oct | 56.5°F | 56.9°F | -0.4° | NCLIMGRID | |
| 1955 | Nov | 42.4°F | 45.0°F | -2.5° | NCLIMGRID | |
| 1955 | Dec | 33.8°F | 35.3°F | -1.4° | NCLIMGRID | |
| 1956 | Jan | 31.4°F | 31.1°F | +0.2° | NCLIMGRID | |
| 1956 | Feb | 39.6°F | 36.0°F | +3.5° | NCLIMGRID | |
| 1956 | Mar | 45.5°F | 46.7°F | -1.2° | NCLIMGRID | |
| 1956 | Apr | 55.0°F | 56.4°F | -1.3° | NCLIMGRID | |
| 1956 | May | 67.8°F | 64.4°F | +3.4° | NCLIMGRID | |
| 1956 | Jun | 72.0°F | 72.2°F | -0.2° | NCLIMGRID | |
| 1956 | Jul | 76.9°F | 76.9°F | +0.0° | NCLIMGRID | |
| 1956 | Aug | 77.3°F | 75.0°F | +2.3° | NCLIMGRID | |
| 1956 | Sep | 68.2°F | 68.0°F | +0.2° | NCLIMGRID | |
| 1956 | Oct | 61.4°F | 56.9°F | +4.5° | NCLIMGRID | |
| 1956 | Nov | 44.3°F | 45.0°F | -0.6° | NCLIMGRID | |
| 1956 | Dec | 41.1°F | 35.3°F | +5.8° | NCLIMGRID | |
| 1957 | Jan | 30.3°F | 31.1°F | -0.9° | NCLIMGRID | |
| 1957 | Feb | 42.4°F | 36.0°F | +6.4° | NCLIMGRID | |
| 1957 | Mar | 44.0°F | 46.7°F | -2.7° | NCLIMGRID | |
| 1957 | Apr | 57.6°F | 56.4°F | +1.3° | NCLIMGRID | |
| 1957 | May | 65.7°F | 64.4°F | +1.3° | NCLIMGRID | |
| 1957 | Jun | 72.4°F | 72.2°F | +0.2° | NCLIMGRID | |
| 1957 | Jul | 76.8°F | 76.9°F | -0.1° | NCLIMGRID | |
| 1957 | Aug | 74.3°F | 75.0°F | -0.7° | NCLIMGRID | |
| 1957 | Sep | 66.0°F | 68.0°F | -2.0° | NCLIMGRID | |
| 1957 | Oct | 54.0°F | 56.9°F | -2.9° | NCLIMGRID | |
| 1957 | Nov | 43.2°F | 45.0°F | -1.8° | NCLIMGRID | |
| 1957 | Dec | 41.1°F | 35.3°F | +5.9° | NCLIMGRID | |
| 1958 | Jan | 32.0°F | 31.1°F | +0.9° | NCLIMGRID | |
| 1958 | Feb | 28.8°F | 36.0°F | -7.2° | NCLIMGRID | |
| 1958 | Mar | 38.1°F | 46.7°F | -8.6° | NCLIMGRID | |
| 1958 | Apr | 55.3°F | 56.4°F | -1.1° | NCLIMGRID | |
| 1958 | May | 64.4°F | 64.4°F | +0.0° | NCLIMGRID | |
| 1958 | Jun | 71.4°F | 72.2°F | -0.8° | NCLIMGRID | |
| 1958 | Jul | 76.4°F | 76.9°F | -0.5° | NCLIMGRID | |
| 1958 | Aug | 75.2°F | 75.0°F | +0.2° | NCLIMGRID | |
| 1958 | Sep | 67.5°F | 68.0°F | -0.5° | NCLIMGRID | |
| 1958 | Oct | 56.7°F | 56.9°F | -0.2° | NCLIMGRID | |
| 1958 | Nov | 47.2°F | 45.0°F | +2.2° | NCLIMGRID | |
| 1958 | Dec | 32.4°F | 35.3°F | -2.9° | NCLIMGRID | |
| 1959 | Jan | 31.6°F | 31.1°F | +0.4° | NCLIMGRID | |
| 1959 | Feb | 36.8°F | 36.0°F | +0.8° | NCLIMGRID | |
| 1959 | Mar | 45.4°F | 46.7°F | -1.4° | NCLIMGRID | |
| 1959 | Apr | 56.3°F | 56.4°F | +0.0° | NCLIMGRID | |
| 1959 | May | 68.5°F | 64.4°F | +4.2° | NCLIMGRID | |
| 1959 | Jun | 72.0°F | 72.2°F | -0.2° | NCLIMGRID | |
| 1959 | Jul | 73.9°F | 76.9°F | -3.0° | NCLIMGRID | |
| 1959 | Aug | 76.9°F | 75.0°F | +1.9° | NCLIMGRID | |
| 1959 | Sep | 69.5°F | 68.0°F | +1.5° | NCLIMGRID | |
| 1959 | Oct | 56.6°F | 56.9°F | -0.3° | NCLIMGRID | |
| 1959 | Nov | 38.9°F | 45.0°F | -6.1° | NCLIMGRID | |
| 1959 | Dec | 38.8°F | 35.3°F | +3.5° | NCLIMGRID | |
| 1960 | Jan | 35.3°F | 31.1°F | +4.1° | NCLIMGRID | |
| 1960 | Feb | 33.7°F | 36.0°F | -2.3° | NCLIMGRID | |
| 1960 | Mar | 32.9°F | 46.7°F | -13.8° | NCLIMGRID | |
| 1960 | Apr | 57.9°F | 56.4°F | +1.5° | NCLIMGRID | |
| 1960 | May | 62.0°F | 64.4°F | -2.4° | NCLIMGRID | |
| 1960 | Jun | 72.4°F | 72.2°F | +0.2° | NCLIMGRID | |
| 1960 | Jul | 74.8°F | 76.9°F | -2.1° | NCLIMGRID | |
| 1960 | Aug | 76.2°F | 75.0°F | +1.2° | NCLIMGRID | |
| 1960 | Sep | 71.2°F | 68.0°F | +3.2° | NCLIMGRID | |
| 1960 | Oct | 58.5°F | 56.9°F | +1.6° | NCLIMGRID | |
| 1960 | Nov | 44.9°F | 45.0°F | -0.1° | NCLIMGRID | |
| 1960 | Dec | 31.0°F | 35.3°F | -4.2° | NCLIMGRID | |
| 1961 | Jan | 29.8°F | 31.1°F | -1.4° | NCLIMGRID | |
| 1961 | Feb | 40.4°F | 36.0°F | +4.4° | NCLIMGRID | |
| 1961 | Mar | 48.1°F | 46.7°F | +1.4° | NCLIMGRID | |
| 1961 | Apr | 52.0°F | 56.4°F | -4.4° | NCLIMGRID | |
| 1961 | May | 61.0°F | 64.4°F | -3.3° | NCLIMGRID | |
| 1961 | Jun | 69.8°F | 72.2°F | -2.4° | NCLIMGRID | |
| 1961 | Jul | 76.0°F | 76.9°F | -0.8° | NCLIMGRID | |
| 1961 | Aug | 73.2°F | 75.0°F | -1.8° | NCLIMGRID | |
| 1961 | Sep | 69.3°F | 68.0°F | +1.3° | NCLIMGRID | |
| 1961 | Oct | 58.6°F | 56.9°F | +1.7° | NCLIMGRID | |
| 1961 | Nov | 44.8°F | 45.0°F | -0.2° | NCLIMGRID | |
| 1961 | Dec | 33.1°F | 35.3°F | -2.1° | NCLIMGRID | |
| 1962 | Jan | 29.2°F | 31.1°F | -2.0° | NCLIMGRID | |
| 1962 | Feb | 40.5°F | 36.0°F | +4.5° | NCLIMGRID | |
| 1962 | Mar | 41.6°F | 46.7°F | -5.1° | NCLIMGRID | |
| 1962 | Apr | 53.3°F | 56.4°F | -3.1° | NCLIMGRID | |
| 1962 | May | 71.1°F | 64.4°F | +6.7° | NCLIMGRID | |
| 1962 | Jun | 72.1°F | 72.2°F | -0.1° | NCLIMGRID | |
| 1962 | Jul | 77.7°F | 76.9°F | +0.8° | NCLIMGRID | |
| 1962 | Aug | 76.8°F | 75.0°F | +1.8° | NCLIMGRID | |
| 1962 | Sep | 66.1°F | 68.0°F | -1.9° | NCLIMGRID | |
| 1962 | Oct | 60.3°F | 56.9°F | +3.4° | NCLIMGRID | |
| 1962 | Nov | 44.3°F | 45.0°F | -0.6° | NCLIMGRID | |
| 1962 | Dec | 34.4°F | 35.3°F | -0.8° | NCLIMGRID | |
| 1963 | Jan | 25.5°F | 31.1°F | -5.7° | NCLIMGRID | |
| 1963 | Feb | 31.3°F | 36.0°F | -4.8° | NCLIMGRID | |
| 1963 | Mar | 50.2°F | 46.7°F | +3.5° | NCLIMGRID | |
| 1963 | Apr | 59.3°F | 56.4°F | +2.9° | NCLIMGRID | |
| 1963 | May | 64.7°F | 64.4°F | +0.3° | NCLIMGRID | |
| 1963 | Jun | 73.5°F | 72.2°F | +1.3° | NCLIMGRID | |
| 1963 | Jul | 75.9°F | 76.9°F | -1.0° | NCLIMGRID | |
| 1963 | Aug | 75.6°F | 75.0°F | +0.6° | NCLIMGRID | |
| 1963 | Sep | 69.1°F | 68.0°F | +1.1° | NCLIMGRID | |
| 1963 | Oct | 64.2°F | 56.9°F | +7.3° | NCLIMGRID | |
| 1963 | Nov | 46.2°F | 45.0°F | +1.2° | NCLIMGRID | |
| 1963 | Dec | 26.5°F | 35.3°F | -8.7° | NCLIMGRID | |
| 1964 | Jan | 35.6°F | 31.1°F | +4.5° | NCLIMGRID | |
| 1964 | Feb | 34.8°F | 36.0°F | -1.3° | NCLIMGRID | |
| 1964 | Mar | 43.9°F | 46.7°F | -2.8° | NCLIMGRID | |
| 1964 | Apr | 59.6°F | 56.4°F | +3.3° | NCLIMGRID | |
| 1964 | May | 66.4°F | 64.4°F | +2.0° | NCLIMGRID | |
| 1964 | Jun | 73.1°F | 72.2°F | +0.9° | NCLIMGRID | |
| 1964 | Jul | 77.2°F | 76.9°F | +0.3° | NCLIMGRID | |
| 1964 | Aug | 73.9°F | 75.0°F | -1.1° | NCLIMGRID | |
| 1964 | Sep | 67.8°F | 68.0°F | -0.2° | NCLIMGRID | |
| 1964 | Oct | 54.8°F | 56.9°F | -2.1° | NCLIMGRID | |
| 1964 | Nov | 47.7°F | 45.0°F | +2.7° | NCLIMGRID | |
| 1964 | Dec | 34.8°F | 35.3°F | -0.5° | NCLIMGRID | |
| 1965 | Jan | 36.2°F | 31.1°F | +5.1° | NCLIMGRID | |
| 1965 | Feb | 35.8°F | 36.0°F | -0.3° | NCLIMGRID | |
| 1965 | Mar | 36.8°F | 46.7°F | -9.9° | NCLIMGRID | |
| 1965 | Apr | 60.1°F | 56.4°F | +3.7° | NCLIMGRID | |
| 1965 | May | 68.0°F | 64.4°F | +3.6° | NCLIMGRID | |
| 1965 | Jun | 72.4°F | 72.2°F | +0.2° | NCLIMGRID | |
| 1965 | Jul | 75.9°F | 76.9°F | -1.0° | NCLIMGRID | |
| 1965 | Aug | 74.3°F | 75.0°F | -0.8° | NCLIMGRID | |
| 1965 | Sep | 69.0°F | 68.0°F | +1.0° | NCLIMGRID | |
| 1965 | Oct | 55.1°F | 56.9°F | -1.7° | NCLIMGRID | |
| 1965 | Nov | 50.2°F | 45.0°F | +5.2° | NCLIMGRID | |
| 1965 | Dec | 41.7°F | 35.3°F | +6.4° | NCLIMGRID | |
| 1966 | Jan | 28.2°F | 31.1°F | -3.0° | NCLIMGRID | |
| 1966 | Feb | 34.3°F | 36.0°F | -1.7° | NCLIMGRID | |
| 1966 | Mar | 47.8°F | 46.7°F | +1.1° | NCLIMGRID | |
| 1966 | Apr | 54.0°F | 56.4°F | -2.4° | NCLIMGRID | |
| 1966 | May | 63.8°F | 64.4°F | -0.6° | NCLIMGRID | |
| 1966 | Jun | 71.3°F | 72.2°F | -0.9° | NCLIMGRID | |
| 1966 | Jul | 80.6°F | 76.9°F | +3.7° | NCLIMGRID | |
| 1966 | Aug | 72.2°F | 75.0°F | -2.8° | NCLIMGRID | |
| 1966 | Sep | 65.0°F | 68.0°F | -3.0° | NCLIMGRID | |
| 1966 | Oct | 53.4°F | 56.9°F | -3.5° | NCLIMGRID | |
| 1966 | Nov | 48.0°F | 45.0°F | +3.0° | NCLIMGRID | |
| 1966 | Dec | 34.4°F | 35.3°F | -0.9° | NCLIMGRID | |
| 1967 | Jan | 36.9°F | 31.1°F | +5.7° | NCLIMGRID | |
| 1967 | Feb | 34.2°F | 36.0°F | -1.8° | NCLIMGRID | |
| 1967 | Mar | 52.4°F | 46.7°F | +5.7° | NCLIMGRID | |
| 1967 | Apr | 61.1°F | 56.4°F | +4.8° | NCLIMGRID | |
| 1967 | May | 61.8°F | 64.4°F | -2.6° | NCLIMGRID | |
| 1967 | Jun | 72.6°F | 72.2°F | +0.4° | NCLIMGRID | |
| 1967 | Jul | 72.8°F | 76.9°F | -4.1° | NCLIMGRID | |
| 1967 | Aug | 71.4°F | 75.0°F | -3.7° | NCLIMGRID | |
| 1967 | Sep | 64.9°F | 68.0°F | -3.1° | NCLIMGRID | |
| 1967 | Oct | 57.0°F | 56.9°F | +0.1° | NCLIMGRID | |
| 1967 | Nov | 42.8°F | 45.0°F | -2.1° | NCLIMGRID | |
| 1967 | Dec | 37.2°F | 35.3°F | +1.9° | NCLIMGRID | |
| 1968 | Jan | 31.9°F | 31.1°F | +0.8° | NCLIMGRID | |
| 1968 | Feb | 31.4°F | 36.0°F | -4.6° | NCLIMGRID | |
| 1968 | Mar | 46.2°F | 46.7°F | -0.5° | NCLIMGRID | |
| 1968 | Apr | 55.2°F | 56.4°F | -1.2° | NCLIMGRID | |
| 1968 | May | 61.8°F | 64.4°F | -2.6° | NCLIMGRID | |
| 1968 | Jun | 73.8°F | 72.2°F | +1.6° | NCLIMGRID | |
| 1968 | Jul | 76.0°F | 76.9°F | -0.9° | NCLIMGRID | |
| 1968 | Aug | 75.9°F | 75.0°F | +0.8° | NCLIMGRID | |
| 1968 | Sep | 65.3°F | 68.0°F | -2.7° | NCLIMGRID | |
| 1968 | Oct | 56.2°F | 56.9°F | -0.6° | NCLIMGRID | |
| 1968 | Nov | 41.9°F | 45.0°F | -3.0° | NCLIMGRID | |
| 1968 | Dec | 33.9°F | 35.3°F | -1.3° | NCLIMGRID | |
| 1969 | Jan | 32.9°F | 31.1°F | +1.8° | NCLIMGRID | |
| 1969 | Feb | 36.7°F | 36.0°F | +0.7° | NCLIMGRID | |
| 1969 | Mar | 39.5°F | 46.7°F | -7.2° | NCLIMGRID | |
| 1969 | Apr | 56.0°F | 56.4°F | -0.4° | NCLIMGRID | |
| 1969 | May | 65.9°F | 64.4°F | +1.6° | NCLIMGRID | |
| 1969 | Jun | 72.4°F | 72.2°F | +0.2° | NCLIMGRID | |
| 1969 | Jul | 79.6°F | 76.9°F | +2.7° | NCLIMGRID | |
| 1969 | Aug | 74.2°F | 75.0°F | -0.8° | NCLIMGRID | |
| 1969 | Sep | 68.1°F | 68.0°F | +0.1° | NCLIMGRID | |
| 1969 | Oct | 56.3°F | 56.9°F | -0.6° | NCLIMGRID | |
| 1969 | Nov | 42.7°F | 45.0°F | -2.2° | NCLIMGRID | |
| 1969 | Dec | 33.3°F | 35.3°F | -1.9° | NCLIMGRID | |
| 1970 | Jan | 27.1°F | 31.1°F | -4.1° | NCLIMGRID | |
| 1970 | Feb | 36.1°F | 36.0°F | +0.0° | NCLIMGRID | |
| 1970 | Mar | 41.2°F | 46.7°F | -5.5° | NCLIMGRID | |
| 1970 | Apr | 58.1°F | 56.4°F | +1.7° | NCLIMGRID | |
| 1970 | May | 66.6°F | 64.4°F | +2.2° | NCLIMGRID | |
| 1970 | Jun | 71.0°F | 72.2°F | -1.2° | NCLIMGRID | |
| 1970 | Jul | 74.5°F | 76.9°F | -2.4° | NCLIMGRID | |
| 1970 | Aug | 75.4°F | 75.0°F | +0.4° | NCLIMGRID | |
| 1970 | Sep | 71.2°F | 68.0°F | +3.2° | NCLIMGRID | |
| 1970 | Oct | 55.1°F | 56.9°F | -1.7° | NCLIMGRID | |
| 1970 | Nov | 43.0°F | 45.0°F | -1.9° | NCLIMGRID | |
| 1970 | Dec | 39.1°F | 35.3°F | +3.9° | NCLIMGRID | |
| 1971 | Jan | 30.4°F | 31.1°F | -0.7° | NCLIMGRID | |
| 1971 | Feb | 35.7°F | 36.0°F | -0.3° | NCLIMGRID | |
| 1971 | Mar | 43.0°F | 46.7°F | -3.7° | NCLIMGRID | |
| 1971 | Apr | 55.3°F | 56.4°F | -1.1° | NCLIMGRID | |
| 1971 | May | 61.8°F | 64.4°F | -2.5° | NCLIMGRID | |
| 1971 | Jun | 75.8°F | 72.2°F | +3.6° | NCLIMGRID | |
| 1971 | Jul | 74.5°F | 76.9°F | -2.4° | NCLIMGRID | |
| 1971 | Aug | 73.1°F | 75.0°F | -1.9° | NCLIMGRID | |
| 1971 | Sep | 71.1°F | 68.0°F | +3.1° | NCLIMGRID | |
| 1971 | Oct | 63.5°F | 56.9°F | +6.6° | NCLIMGRID | |
| 1971 | Nov | 44.2°F | 45.0°F | -0.8° | NCLIMGRID | |
| 1971 | Dec | 41.8°F | 35.3°F | +6.5° | NCLIMGRID | |
| 1972 | Jan | 33.4°F | 31.1°F | +2.2° | NCLIMGRID | |
| 1972 | Feb | 39.1°F | 36.0°F | +3.0° | NCLIMGRID | |
| 1972 | Mar | 48.2°F | 46.7°F | +1.5° | NCLIMGRID | |
| 1972 | Apr | 55.5°F | 56.4°F | -0.9° | NCLIMGRID | |
| 1972 | May | 64.8°F | 64.4°F | +0.4° | NCLIMGRID | |
| 1972 | Jun | 72.0°F | 72.2°F | -0.2° | NCLIMGRID | |
| 1972 | Jul | 73.6°F | 76.9°F | -3.3° | NCLIMGRID | |
| 1972 | Aug | 74.2°F | 75.0°F | -0.8° | NCLIMGRID | |
| 1972 | Sep | 70.8°F | 68.0°F | +2.8° | NCLIMGRID | |
| 1972 | Oct | 56.1°F | 56.9°F | -0.8° | NCLIMGRID | |
| 1972 | Nov | 40.5°F | 45.0°F | -4.5° | NCLIMGRID | |
| 1972 | Dec | 31.9°F | 35.3°F | -3.3° | NCLIMGRID | |
| 1973 | Jan | 33.8°F | 31.1°F | +2.7° | NCLIMGRID | |
| 1973 | Feb | 34.4°F | 36.0°F | -1.7° | NCLIMGRID | |
| 1973 | Mar | 52.3°F | 46.7°F | +5.6° | NCLIMGRID | |
| 1973 | Apr | 53.1°F | 56.4°F | -3.3° | NCLIMGRID | |
| 1973 | May | 62.5°F | 64.4°F | -1.8° | NCLIMGRID | |
| 1973 | Jun | 72.2°F | 72.2°F | +0.0° | NCLIMGRID | |
| 1973 | Jul | 77.4°F | 76.9°F | +0.5° | NCLIMGRID | |
| 1973 | Aug | 75.3°F | 75.0°F | +0.3° | NCLIMGRID | |
| 1973 | Sep | 69.2°F | 68.0°F | +1.2° | NCLIMGRID | |
| 1973 | Oct | 61.2°F | 56.9°F | +4.3° | NCLIMGRID | |
| 1973 | Nov | 49.5°F | 45.0°F | +4.5° | NCLIMGRID | |
| 1973 | Dec | 33.6°F | 35.3°F | -1.7° | NCLIMGRID | |
| 1974 | Jan | 33.7°F | 31.1°F | +2.5° | NCLIMGRID | |
| 1974 | Feb | 39.7°F | 36.0°F | +3.7° | NCLIMGRID | |
| 1974 | Mar | 51.0°F | 46.7°F | +4.3° | NCLIMGRID | |
| 1974 | Apr | 57.0°F | 56.4°F | +0.7° | NCLIMGRID | |
| 1974 | May | 66.1°F | 64.4°F | +1.7° | NCLIMGRID | |
| 1974 | Jun | 67.3°F | 72.2°F | -4.9° | NCLIMGRID | |
| 1974 | Jul | 77.6°F | 76.9°F | +0.7° | NCLIMGRID | |
| 1974 | Aug | 73.4°F | 75.0°F | -1.6° | NCLIMGRID | |
| 1974 | Sep | 62.0°F | 68.0°F | -6.0° | NCLIMGRID | |
| 1974 | Oct | 56.9°F | 56.9°F | +0.1° | NCLIMGRID | |
| 1974 | Nov | 44.8°F | 45.0°F | -0.2° | NCLIMGRID | |
| 1974 | Dec | 35.1°F | 35.3°F | -0.2° | NCLIMGRID | |
| 1975 | Jan | 35.9°F | 31.1°F | +4.7° | NCLIMGRID | |
| 1975 | Feb | 35.0°F | 36.0°F | -1.1° | NCLIMGRID | |
| 1975 | Mar | 41.0°F | 46.7°F | -5.7° | NCLIMGRID | |
| 1975 | Apr | 55.0°F | 56.4°F | -1.4° | NCLIMGRID | |
| 1975 | May | 66.8°F | 64.4°F | +2.5° | NCLIMGRID | |
| 1975 | Jun | 72.5°F | 72.2°F | +0.3° | NCLIMGRID | |
| 1975 | Jul | 76.0°F | 76.9°F | -0.9° | NCLIMGRID | |
| 1975 | Aug | 75.3°F | 75.0°F | +0.3° | NCLIMGRID | |
| 1975 | Sep | 64.2°F | 68.0°F | -3.8° | NCLIMGRID | |
| 1975 | Oct | 58.9°F | 56.9°F | +2.1° | NCLIMGRID | |
| 1975 | Nov | 45.8°F | 45.0°F | +0.8° | NCLIMGRID | |
| 1975 | Dec | 36.7°F | 35.3°F | +1.4° | NCLIMGRID | |
| 1976 | Jan | 31.7°F | 31.1°F | +0.6° | NCLIMGRID | |
| 1976 | Feb | 45.4°F | 36.0°F | +9.4° | NCLIMGRID | |
| 1976 | Mar | 51.5°F | 46.7°F | +4.8° | NCLIMGRID | |
| 1976 | Apr | 56.6°F | 56.4°F | +0.2° | NCLIMGRID | |
| 1976 | May | 59.7°F | 64.4°F | -4.6° | NCLIMGRID | |
| 1976 | Jun | 69.5°F | 72.2°F | -2.7° | NCLIMGRID | |
| 1976 | Jul | 75.1°F | 76.9°F | -1.8° | NCLIMGRID | |
| 1976 | Aug | 72.1°F | 75.0°F | -2.9° | NCLIMGRID | |
| 1976 | Sep | 66.8°F | 68.0°F | -1.2° | NCLIMGRID | |
| 1976 | Oct | 52.1°F | 56.9°F | -4.8° | NCLIMGRID | |
| 1976 | Nov | 37.5°F | 45.0°F | -7.5° | NCLIMGRID | |
| 1976 | Dec | 33.1°F | 35.3°F | -2.1° | NCLIMGRID | |
| 1977 | Jan | 18.8°F | 31.1°F | -12.3° | NCLIMGRID | |
| 1977 | Feb | 36.5°F | 36.0°F | +0.4° | NCLIMGRID | |
| 1977 | Mar | 50.7°F | 46.7°F | +4.0° | NCLIMGRID | |
| 1977 | Apr | 59.5°F | 56.4°F | +3.2° | NCLIMGRID | |
| 1977 | May | 68.4°F | 64.4°F | +4.0° | NCLIMGRID | |
| 1977 | Jun | 74.3°F | 72.2°F | +2.1° | NCLIMGRID | |
| 1977 | Jul | 78.1°F | 76.9°F | +1.2° | NCLIMGRID | |
| 1977 | Aug | 76.6°F | 75.0°F | +1.6° | NCLIMGRID | |
| 1977 | Sep | 70.4°F | 68.0°F | +2.4° | NCLIMGRID | |
| 1977 | Oct | 56.9°F | 56.9°F | +0.0° | NCLIMGRID | |
| 1977 | Nov | 46.7°F | 45.0°F | +1.7° | NCLIMGRID | |
| 1977 | Dec | 33.9°F | 35.3°F | -1.3° | NCLIMGRID | |
| 1978 | Jan | 23.3°F | 31.1°F | -7.9° | NCLIMGRID | |
| 1978 | Feb | 25.9°F | 36.0°F | -10.1° | NCLIMGRID | |
| 1978 | Mar | 41.6°F | 46.7°F | -5.1° | NCLIMGRID | |
| 1978 | Apr | 58.1°F | 56.4°F | +1.7° | NCLIMGRID | |
| 1978 | May | 63.7°F | 64.4°F | -0.6° | NCLIMGRID | |
| 1978 | Jun | 71.4°F | 72.2°F | -0.8° | NCLIMGRID | |
| 1978 | Jul | 77.7°F | 76.9°F | +0.8° | NCLIMGRID | |
| 1978 | Aug | 74.8°F | 75.0°F | -0.2° | NCLIMGRID | |
| 1978 | Sep | 70.0°F | 68.0°F | +2.0° | NCLIMGRID | |
| 1978 | Oct | 55.0°F | 56.9°F | -1.8° | NCLIMGRID | |
| 1978 | Nov | 47.6°F | 45.0°F | +2.7° | NCLIMGRID | |
| 1978 | Dec | 35.0°F | 35.3°F | -0.3° | NCLIMGRID | |
| 1979 | Jan | 19.9°F | 31.1°F | -11.2° | NCLIMGRID | |
| 1979 | Feb | 29.5°F | 36.0°F | -6.5° | NCLIMGRID | |
| 1979 | Mar | 46.4°F | 46.7°F | -0.3° | NCLIMGRID | |
| 1979 | Apr | 54.9°F | 56.4°F | -1.4° | NCLIMGRID | |
| 1979 | May | 62.9°F | 64.4°F | -1.5° | NCLIMGRID | |
| 1979 | Jun | 69.9°F | 72.2°F | -2.3° | NCLIMGRID | |
| 1979 | Jul | 75.1°F | 76.9°F | -1.8° | NCLIMGRID | |
| 1979 | Aug | 73.4°F | 75.0°F | -1.6° | NCLIMGRID | |
| 1979 | Sep | 65.9°F | 68.0°F | -2.1° | NCLIMGRID | |
| 1979 | Oct | 58.4°F | 56.9°F | +1.6° | NCLIMGRID | |
| 1979 | Nov | 42.1°F | 45.0°F | -2.9° | NCLIMGRID | |
| 1979 | Dec | 36.9°F | 35.3°F | +1.6° | NCLIMGRID | |
| 1980 | Jan | 34.4°F | 31.1°F | +3.2° | NCLIMGRID | |
| 1980 | Feb | 30.7°F | 36.0°F | -5.4° | NCLIMGRID | |
| 1980 | Mar | 41.0°F | 46.7°F | -5.7° | NCLIMGRID | |
| 1980 | Apr | 54.1°F | 56.4°F | -2.3° | NCLIMGRID | |
| 1980 | May | 64.5°F | 64.4°F | +0.1° | NCLIMGRID | |
| 1980 | Jun | 72.9°F | 72.2°F | +0.7° | NCLIMGRID | |
| 1980 | Jul | 82.4°F | 76.9°F | +5.5° | NCLIMGRID | |
| 1980 | Aug | 81.0°F | 75.0°F | +6.0° | NCLIMGRID | |
| 1980 | Sep | 72.7°F | 68.0°F | +4.7° | NCLIMGRID | |
| 1980 | Oct | 55.0°F | 56.9°F | -1.8° | NCLIMGRID | |
| 1980 | Nov | 44.2°F | 45.0°F | -0.7° | NCLIMGRID | |
| 1980 | Dec | 36.1°F | 35.3°F | +0.8° | NCLIMGRID | |
| 1981 | Jan | 32.5°F | 31.1°F | +1.4° | NCLIMGRID | |
| 1981 | Feb | 38.5°F | 36.0°F | +2.5° | NCLIMGRID | |
| 1981 | Mar | 45.2°F | 46.7°F | -1.5° | NCLIMGRID | |
| 1981 | Apr | 62.9°F | 56.4°F | +6.5° | NCLIMGRID | |
| 1981 | May | 60.7°F | 64.4°F | -3.7° | NCLIMGRID | |
| 1981 | Jun | 73.7°F | 72.2°F | +1.5° | NCLIMGRID | |
| 1981 | Jul | 78.1°F | 76.9°F | +1.2° | NCLIMGRID | |
| 1981 | Aug | 73.7°F | 75.0°F | -1.4° | NCLIMGRID | |
| 1981 | Sep | 67.3°F | 68.0°F | -0.7° | NCLIMGRID | |
| 1981 | Oct | 55.2°F | 56.9°F | -1.6° | NCLIMGRID | |
| 1981 | Nov | 47.5°F | 45.0°F | +2.6° | NCLIMGRID | |
| 1981 | Dec | 33.4°F | 35.3°F | -1.9° | NCLIMGRID | |
| 1982 | Jan | 27.3°F | 31.1°F | -3.9° | NCLIMGRID | |
| 1982 | Feb | 32.7°F | 36.0°F | -3.3° | NCLIMGRID | |
| 1982 | Mar | 49.9°F | 46.7°F | +3.2° | NCLIMGRID | |
| 1982 | Apr | 52.1°F | 56.4°F | -4.2° | NCLIMGRID | |
| 1982 | May | 68.0°F | 64.4°F | +3.7° | NCLIMGRID | |
| 1982 | Jun | 68.8°F | 72.2°F | -3.4° | NCLIMGRID | |
| 1982 | Jul | 77.3°F | 76.9°F | +0.4° | NCLIMGRID | |
| 1982 | Aug | 74.3°F | 75.0°F | -0.7° | NCLIMGRID | |
| 1982 | Sep | 66.1°F | 68.0°F | -2.0° | NCLIMGRID | |
| 1982 | Oct | 56.2°F | 56.9°F | -0.6° | NCLIMGRID | |
| 1982 | Nov | 45.4°F | 45.0°F | +0.5° | NCLIMGRID | |
| 1982 | Dec | 41.3°F | 35.3°F | +6.1° | NCLIMGRID | |
| 1983 | Jan | 32.7°F | 31.1°F | +1.6° | NCLIMGRID | |
| 1983 | Feb | 38.8°F | 36.0°F | +2.7° | NCLIMGRID | |
| 1983 | Mar | 45.5°F | 46.7°F | -1.2° | NCLIMGRID | |
| 1983 | Apr | 50.6°F | 56.4°F | -5.8° | NCLIMGRID | |
| 1983 | May | 61.7°F | 64.4°F | -2.6° | NCLIMGRID | |
| 1983 | Jun | 70.3°F | 72.2°F | -1.9° | NCLIMGRID | |
| 1983 | Jul | 78.2°F | 76.9°F | +1.3° | NCLIMGRID | |
| 1983 | Aug | 80.4°F | 75.0°F | +5.3° | NCLIMGRID | |
| 1983 | Sep | 69.5°F | 68.0°F | +1.5° | NCLIMGRID | |
| 1983 | Oct | 59.4°F | 56.9°F | +2.5° | NCLIMGRID | |
| 1983 | Nov | 46.6°F | 45.0°F | +1.6° | NCLIMGRID | |
| 1983 | Dec | 23.3°F | 35.3°F | -12.0° | NCLIMGRID | |
| 1984 | Jan | 29.3°F | 31.1°F | -1.8° | NCLIMGRID | |
| 1984 | Feb | 40.7°F | 36.0°F | +4.7° | NCLIMGRID | |
| 1984 | Mar | 42.2°F | 46.7°F | -4.5° | NCLIMGRID | |
| 1984 | Apr | 55.3°F | 56.4°F | -1.1° | NCLIMGRID | |
| 1984 | May | 61.8°F | 64.4°F | -2.6° | NCLIMGRID | |
| 1984 | Jun | 74.1°F | 72.2°F | +1.9° | NCLIMGRID | |
| 1984 | Jul | 75.4°F | 76.9°F | -1.5° | NCLIMGRID | |
| 1984 | Aug | 75.1°F | 75.0°F | +0.1° | NCLIMGRID | |
| 1984 | Sep | 66.0°F | 68.0°F | -2.0° | NCLIMGRID | |
| 1984 | Oct | 59.5°F | 56.9°F | +2.6° | NCLIMGRID | |
| 1984 | Nov | 43.3°F | 45.0°F | -1.7° | NCLIMGRID | |
| 1984 | Dec | 43.0°F | 35.3°F | +7.8° | NCLIMGRID | |
| 1985 | Jan | 23.8°F | 31.1°F | -7.3° | NCLIMGRID | |
| 1985 | Feb | 31.9°F | 36.0°F | -4.1° | NCLIMGRID | |
| 1985 | Mar | 49.8°F | 46.7°F | +3.1° | NCLIMGRID | |
| 1985 | Apr | 59.5°F | 56.4°F | +3.1° | NCLIMGRID | |
| 1985 | May | 64.8°F | 64.4°F | +0.5° | NCLIMGRID | |
| 1985 | Jun | 70.5°F | 72.2°F | -1.7° | NCLIMGRID | |
| 1985 | Jul | 76.5°F | 76.9°F | -0.4° | NCLIMGRID | |
| 1985 | Aug | 74.5°F | 75.0°F | -0.5° | NCLIMGRID | |
| 1985 | Sep | 67.3°F | 68.0°F | -0.8° | NCLIMGRID | |
| 1985 | Oct | 59.4°F | 56.9°F | +2.5° | NCLIMGRID | |
| 1985 | Nov | 48.3°F | 45.0°F | +3.3° | NCLIMGRID | |
| 1985 | Dec | 29.7°F | 35.3°F | -5.6° | NCLIMGRID | |
| 1986 | Jan | 36.4°F | 31.1°F | +5.3° | NCLIMGRID | |
| 1986 | Feb | 40.7°F | 36.0°F | +4.7° | NCLIMGRID | |
| 1986 | Mar | 48.8°F | 46.7°F | +2.1° | NCLIMGRID | |
| 1986 | Apr | 58.6°F | 56.4°F | +2.2° | NCLIMGRID | |
| 1986 | May | 66.0°F | 64.4°F | +1.6° | NCLIMGRID | |
| 1986 | Jun | 74.8°F | 72.2°F | +2.6° | NCLIMGRID | |
| 1986 | Jul | 81.0°F | 76.9°F | +4.1° | NCLIMGRID | |
| 1986 | Aug | 72.9°F | 75.0°F | -2.1° | NCLIMGRID | |
| 1986 | Sep | 72.2°F | 68.0°F | +4.2° | NCLIMGRID | |
| 1986 | Oct | 58.6°F | 56.9°F | +1.8° | NCLIMGRID | |
| 1986 | Nov | 42.5°F | 45.0°F | -2.4° | NCLIMGRID | |
| 1986 | Dec | 35.3°F | 35.3°F | +0.1° | NCLIMGRID | |
| 1987 | Jan | 33.7°F | 31.1°F | +2.6° | NCLIMGRID | |
| 1987 | Feb | 39.8°F | 36.0°F | +3.8° | NCLIMGRID | |
| 1987 | Mar | 49.1°F | 46.7°F | +2.4° | NCLIMGRID | |
| 1987 | Apr | 56.0°F | 56.4°F | -0.4° | NCLIMGRID | |
| 1987 | May | 69.1°F | 64.4°F | +4.7° | NCLIMGRID | |
| 1987 | Jun | 73.9°F | 72.2°F | +1.7° | NCLIMGRID | |
| 1987 | Jul | 76.7°F | 76.9°F | -0.2° | NCLIMGRID | |
| 1987 | Aug | 78.1°F | 75.0°F | +3.1° | NCLIMGRID | |
| 1987 | Sep | 68.6°F | 68.0°F | +0.5° | NCLIMGRID | |
| 1987 | Oct | 52.7°F | 56.9°F | -4.1° | NCLIMGRID | |
| 1987 | Nov | 48.1°F | 45.0°F | +3.1° | NCLIMGRID | |
| 1987 | Dec | 37.5°F | 35.3°F | +2.3° | NCLIMGRID | |
| 1988 | Jan | 30.0°F | 31.1°F | -1.1° | NCLIMGRID | |
| 1988 | Feb | 33.8°F | 36.0°F | -2.3° | NCLIMGRID | |
| 1988 | Mar | 45.3°F | 46.7°F | -1.4° | NCLIMGRID | |
| 1988 | Apr | 56.6°F | 56.4°F | +0.2° | NCLIMGRID | |
| 1988 | May | 66.0°F | 64.4°F | +1.6° | NCLIMGRID | |
| 1988 | Jun | 74.5°F | 72.2°F | +2.3° | NCLIMGRID | |
| 1988 | Jul | 76.0°F | 76.9°F | -0.9° | NCLIMGRID | |
| 1988 | Aug | 77.2°F | 75.0°F | +2.1° | NCLIMGRID | |
| 1988 | Sep | 68.5°F | 68.0°F | +0.4° | NCLIMGRID | |
| 1988 | Oct | 53.3°F | 56.9°F | -3.6° | NCLIMGRID | |
| 1988 | Nov | 46.6°F | 45.0°F | +1.7° | NCLIMGRID | |
| 1988 | Dec | 37.3°F | 35.3°F | +2.1° | NCLIMGRID | |
| 1989 | Jan | 39.6°F | 31.1°F | +8.5° | NCLIMGRID | |
| 1989 | Feb | 30.6°F | 36.0°F | -5.4° | NCLIMGRID | |
| 1989 | Mar | 46.3°F | 46.7°F | -0.4° | NCLIMGRID | |
| 1989 | Apr | 56.4°F | 56.4°F | +0.1° | NCLIMGRID | |
| 1989 | May | 63.2°F | 64.4°F | -1.2° | NCLIMGRID | |
| 1989 | Jun | 70.1°F | 72.2°F | -2.1° | NCLIMGRID | |
| 1989 | Jul | 74.6°F | 76.9°F | -2.3° | NCLIMGRID | |
| 1989 | Aug | 75.2°F | 75.0°F | +0.2° | NCLIMGRID | |
| 1989 | Sep | 65.7°F | 68.0°F | -2.3° | NCLIMGRID | |
| 1989 | Oct | 58.3°F | 56.9°F | +1.5° | NCLIMGRID | |
| 1989 | Nov | 47.5°F | 45.0°F | +2.6° | NCLIMGRID | |
| 1989 | Dec | 26.9°F | 35.3°F | -8.4° | NCLIMGRID | |
| 1990 | Jan | 40.7°F | 31.1°F | +9.5° | NCLIMGRID | |
| 1990 | Feb | 43.6°F | 36.0°F | +7.6° | NCLIMGRID | |
| 1990 | Mar | 49.1°F | 46.7°F | +2.4° | NCLIMGRID | |
| 1990 | Apr | 55.4°F | 56.4°F | -0.9° | NCLIMGRID | |
| 1990 | May | 61.5°F | 64.4°F | -2.9° | NCLIMGRID | |
| 1990 | Jun | 73.3°F | 72.2°F | +1.1° | NCLIMGRID | |
| 1990 | Jul | 76.5°F | 76.9°F | -0.4° | NCLIMGRID | |
| 1990 | Aug | 75.4°F | 75.0°F | +0.4° | NCLIMGRID | |
| 1990 | Sep | 71.3°F | 68.0°F | +3.3° | NCLIMGRID | |
| 1990 | Oct | 54.9°F | 56.9°F | -2.0° | NCLIMGRID | |
| 1990 | Nov | 49.9°F | 45.0°F | +4.9° | NCLIMGRID | |
| 1990 | Dec | 36.8°F | 35.3°F | +1.5° | NCLIMGRID | |
| 1991 | Jan | 31.4°F | 31.1°F | +0.2° | NCLIMGRID | |
| 1991 | Feb | 41.4°F | 36.0°F | +5.3° | NCLIMGRID | |
| 1991 | Mar | 49.5°F | 46.7°F | +2.8° | NCLIMGRID | |
| 1991 | Apr | 58.6°F | 56.4°F | +2.2° | NCLIMGRID | |
| 1991 | May | 69.7°F | 64.4°F | +5.3° | NCLIMGRID | |
| 1991 | Jun | 74.5°F | 72.2°F | +2.3° | NCLIMGRID | |
| 1991 | Jul | 77.9°F | 76.9°F | +1.0° | NCLIMGRID | |
| 1991 | Aug | 75.5°F | 75.0°F | +0.5° | NCLIMGRID | |
| 1991 | Sep | 68.3°F | 68.0°F | +0.3° | NCLIMGRID | |
| 1991 | Oct | 58.8°F | 56.9°F | +1.9° | NCLIMGRID | |
| 1991 | Nov | 42.0°F | 45.0°F | -3.0° | NCLIMGRID | |
| 1991 | Dec | 40.2°F | 35.3°F | +4.9° | NCLIMGRID | |
| 1992 | Jan | 36.5°F | 31.1°F | +5.4° | NCLIMGRID | |
| 1992 | Feb | 43.5°F | 36.0°F | +7.5° | NCLIMGRID | |
| 1992 | Mar | 48.5°F | 46.7°F | +1.8° | NCLIMGRID | |
| 1992 | Apr | 57.4°F | 56.4°F | +1.0° | NCLIMGRID | |
| 1992 | May | 62.5°F | 64.4°F | -1.9° | NCLIMGRID | |
| 1992 | Jun | 70.0°F | 72.2°F | -2.2° | NCLIMGRID | |
| 1992 | Jul | 76.5°F | 76.9°F | -0.4° | NCLIMGRID | |
| 1992 | Aug | 70.6°F | 75.0°F | -4.4° | NCLIMGRID | |
| 1992 | Sep | 66.7°F | 68.0°F | -1.3° | NCLIMGRID | |
| 1992 | Oct | 56.6°F | 56.9°F | -0.2° | NCLIMGRID | |
| 1992 | Nov | 45.1°F | 45.0°F | +0.1° | NCLIMGRID | |
| 1992 | Dec | 35.6°F | 35.3°F | +0.3° | NCLIMGRID | |
| 1993 | Jan | 33.5°F | 31.1°F | +2.4° | NCLIMGRID | |
| 1993 | Feb | 34.0°F | 36.0°F | -2.0° | NCLIMGRID | |
| 1993 | Mar | 43.2°F | 46.7°F | -3.5° | NCLIMGRID | |
| 1993 | Apr | 52.4°F | 56.4°F | -4.0° | NCLIMGRID | |
| 1993 | May | 63.1°F | 64.4°F | -1.2° | NCLIMGRID | |
| 1993 | Jun | 71.8°F | 72.2°F | -0.4° | NCLIMGRID | |
| 1993 | Jul | 80.6°F | 76.9°F | +3.7° | NCLIMGRID | |
| 1993 | Aug | 77.8°F | 75.0°F | +2.7° | NCLIMGRID | |
| 1993 | Sep | 65.9°F | 68.0°F | -2.1° | NCLIMGRID | |
| 1993 | Oct | 54.1°F | 56.9°F | -2.7° | NCLIMGRID | |
| 1993 | Nov | 42.0°F | 45.0°F | -2.9° | NCLIMGRID | |
| 1993 | Dec | 37.0°F | 35.3°F | +1.8° | NCLIMGRID | |
| 1994 | Jan | 29.5°F | 31.1°F | -1.7° | NCLIMGRID | |
| 1994 | Feb | 37.1°F | 36.0°F | +1.0° | NCLIMGRID | |
| 1994 | Mar | 46.0°F | 46.7°F | -0.7° | NCLIMGRID | |
| 1994 | Apr | 58.3°F | 56.4°F | +2.0° | NCLIMGRID | |
| 1994 | May | 61.9°F | 64.4°F | -2.5° | NCLIMGRID | |
| 1994 | Jun | 75.4°F | 72.2°F | +3.2° | NCLIMGRID | |
| 1994 | Jul | 75.5°F | 76.9°F | -1.4° | NCLIMGRID | |
| 1994 | Aug | 72.9°F | 75.0°F | -2.1° | NCLIMGRID | |
| 1994 | Sep | 65.0°F | 68.0°F | -3.0° | NCLIMGRID | |
| 1994 | Oct | 58.9°F | 56.9°F | +2.1° | NCLIMGRID | |
| 1994 | Nov | 51.2°F | 45.0°F | +6.3° | NCLIMGRID | |
| 1994 | Dec | 40.8°F | 35.3°F | +5.5° | NCLIMGRID | |
| 1995 | Jan | 34.5°F | 31.1°F | +3.4° | NCLIMGRID | |
| 1995 | Feb | 38.9°F | 36.0°F | +2.9° | NCLIMGRID | |
| 1995 | Mar | 49.4°F | 46.7°F | +2.7° | NCLIMGRID | |
| 1995 | Apr | 56.1°F | 56.4°F | -0.2° | NCLIMGRID | |
| 1995 | May | 63.9°F | 64.4°F | -0.5° | NCLIMGRID | |
| 1995 | Jun | 71.3°F | 72.2°F | -0.9° | NCLIMGRID | |
| 1995 | Jul | 76.4°F | 76.9°F | -0.5° | NCLIMGRID | |
| 1995 | Aug | 79.6°F | 75.0°F | +4.5° | NCLIMGRID | |
| 1995 | Sep | 64.6°F | 68.0°F | -3.4° | NCLIMGRID | |
| 1995 | Oct | 57.7°F | 56.9°F | +0.8° | NCLIMGRID | |
| 1995 | Nov | 42.3°F | 45.0°F | -2.7° | NCLIMGRID | |
| 1995 | Dec | 35.7°F | 35.3°F | +0.5° | NCLIMGRID | |
| 1996 | Jan | 32.6°F | 31.1°F | +1.5° | NCLIMGRID | |
| 1996 | Feb | 39.0°F | 36.0°F | +3.0° | NCLIMGRID | |
| 1996 | Mar | 40.9°F | 46.7°F | -5.8° | NCLIMGRID | |
| 1996 | Apr | 53.4°F | 56.4°F | -2.9° | NCLIMGRID | |
| 1996 | May | 67.4°F | 64.4°F | +3.0° | NCLIMGRID | |
| 1996 | Jun | 73.2°F | 72.2°F | +1.0° | NCLIMGRID | |
| 1996 | Jul | 76.1°F | 76.9°F | -0.8° | NCLIMGRID | |
| 1996 | Aug | 75.1°F | 75.0°F | +0.1° | NCLIMGRID | |
| 1996 | Sep | 65.7°F | 68.0°F | -2.3° | NCLIMGRID | |
| 1996 | Oct | 57.2°F | 56.9°F | +0.3° | NCLIMGRID | |
| 1996 | Nov | 41.0°F | 45.0°F | -4.0° | NCLIMGRID | |
| 1996 | Dec | 38.1°F | 35.3°F | +2.8° | NCLIMGRID | |
| 1997 | Jan | 31.1°F | 31.1°F | -0.1° | NCLIMGRID | |
| 1997 | Feb | 42.3°F | 36.0°F | +6.2° | NCLIMGRID | |
| 1997 | Mar | 49.7°F | 46.7°F | +3.0° | NCLIMGRID | |
| 1997 | Apr | 51.5°F | 56.4°F | -4.9° | NCLIMGRID | |
| 1997 | May | 61.0°F | 64.4°F | -3.4° | NCLIMGRID | |
| 1997 | Jun | 71.3°F | 72.2°F | -0.9° | NCLIMGRID | |
| 1997 | Jul | 78.9°F | 76.9°F | +2.1° | NCLIMGRID | |
| 1997 | Aug | 74.4°F | 75.0°F | -0.6° | NCLIMGRID | |
| 1997 | Sep | 68.3°F | 68.0°F | +0.3° | NCLIMGRID | |
| 1997 | Oct | 56.8°F | 56.9°F | +0.0° | NCLIMGRID | |
| 1997 | Nov | 42.9°F | 45.0°F | -2.1° | NCLIMGRID | |
| 1997 | Dec | 36.8°F | 35.3°F | +1.6° | NCLIMGRID | |
| 1998 | Jan | 39.1°F | 31.1°F | +8.0° | NCLIMGRID | |
| 1998 | Feb | 42.8°F | 36.0°F | +6.8° | NCLIMGRID | |
| 1998 | Mar | 44.6°F | 46.7°F | -2.1° | NCLIMGRID | |
| 1998 | Apr | 56.3°F | 56.4°F | +0.0° | NCLIMGRID | |
| 1998 | May | 69.1°F | 64.4°F | +4.8° | NCLIMGRID | |
| 1998 | Jun | 75.9°F | 72.2°F | +3.7° | NCLIMGRID | |
| 1998 | Jul | 79.0°F | 76.9°F | +2.1° | NCLIMGRID | |
| 1998 | Aug | 76.6°F | 75.0°F | +1.6° | NCLIMGRID | |
| 1998 | Sep | 73.9°F | 68.0°F | +5.9° | NCLIMGRID | |
| 1998 | Oct | 59.6°F | 56.9°F | +2.8° | NCLIMGRID | |
| 1998 | Nov | 50.1°F | 45.0°F | +5.1° | NCLIMGRID | |
| 1998 | Dec | 38.5°F | 35.3°F | +3.2° | NCLIMGRID | |
| 1999 | Jan | 35.4°F | 31.1°F | +4.3° | NCLIMGRID | |
| 1999 | Feb | 44.2°F | 36.0°F | +8.2° | NCLIMGRID | |
| 1999 | Mar | 43.8°F | 46.7°F | -2.9° | NCLIMGRID | |
| 1999 | Apr | 59.0°F | 56.4°F | +2.7° | NCLIMGRID | |
| 1999 | May | 64.2°F | 64.4°F | -0.2° | NCLIMGRID | |
| 1999 | Jun | 73.7°F | 72.2°F | +1.5° | NCLIMGRID | |
| 1999 | Jul | 79.6°F | 76.9°F | +2.8° | NCLIMGRID | |
| 1999 | Aug | 77.3°F | 75.0°F | +2.3° | NCLIMGRID | |
| 1999 | Sep | 68.7°F | 68.0°F | +0.6° | NCLIMGRID | |
| 1999 | Oct | 58.0°F | 56.9°F | +1.1° | NCLIMGRID | |
| 1999 | Nov | 51.8°F | 45.0°F | +6.8° | NCLIMGRID | |
| 1999 | Dec | 38.9°F | 35.3°F | +3.6° | NCLIMGRID | |
| 2000 | Jan | 35.4°F | 31.1°F | +4.3° | NCLIMGRID | |
| 2000 | Feb | 44.3°F | 36.0°F | +8.2° | NCLIMGRID | |
| 2000 | Mar | 50.3°F | 46.7°F | +3.6° | NCLIMGRID | |
| 2000 | Apr | 56.6°F | 56.4°F | +0.2° | NCLIMGRID | |
| 2000 | May | 67.8°F | 64.4°F | +3.4° | NCLIMGRID | |
| 2000 | Jun | 71.7°F | 72.2°F | -0.5° | NCLIMGRID | |
| 2000 | Jul | 76.4°F | 76.9°F | -0.5° | NCLIMGRID | |
| 2000 | Aug | 80.3°F | 75.0°F | +5.3° | NCLIMGRID | |
| 2000 | Sep | 70.0°F | 68.0°F | +1.9° | NCLIMGRID | |
| 2000 | Oct | 61.2°F | 56.9°F | +4.3° | NCLIMGRID | |
| 2000 | Nov | 42.3°F | 45.0°F | -2.7° | NCLIMGRID | |
| 2000 | Dec | 25.3°F | 35.3°F | -10.0° | NCLIMGRID | |
| 2001 | Jan | 32.4°F | 31.1°F | +1.3° | NCLIMGRID | |
| 2001 | Feb | 40.1°F | 36.0°F | +4.0° | NCLIMGRID | |
| 2001 | Mar | 43.6°F | 46.7°F | -3.1° | NCLIMGRID | |
| 2001 | Apr | 62.0°F | 56.4°F | +5.6° | NCLIMGRID | |
| 2001 | May | 65.8°F | 64.4°F | +1.4° | NCLIMGRID | |
| 2001 | Jun | 72.3°F | 72.2°F | +0.1° | NCLIMGRID | |
| 2001 | Jul | 79.1°F | 76.9°F | +2.2° | NCLIMGRID | |
| 2001 | Aug | 78.6°F | 75.0°F | +3.6° | NCLIMGRID | |
| 2001 | Sep | 67.1°F | 68.0°F | -0.9° | NCLIMGRID | |
| 2001 | Oct | 56.4°F | 56.9°F | -0.4° | NCLIMGRID | |
| 2001 | Nov | 51.2°F | 45.0°F | +6.3° | NCLIMGRID | |
| 2001 | Dec | 39.7°F | 35.3°F | +4.4° | NCLIMGRID | |
| 2002 | Jan | 36.8°F | 31.1°F | +5.6° | NCLIMGRID | |
| 2002 | Feb | 38.8°F | 36.0°F | +2.8° | NCLIMGRID | |
| 2002 | Mar | 43.7°F | 46.7°F | -3.0° | NCLIMGRID | |
| 2002 | Apr | 60.3°F | 56.4°F | +4.0° | NCLIMGRID | |
| 2002 | May | 63.4°F | 64.4°F | -0.9° | NCLIMGRID | |
| 2002 | Jun | 74.1°F | 72.2°F | +1.9° | NCLIMGRID | |
| 2002 | Jul | 78.4°F | 76.9°F | +1.5° | NCLIMGRID | |
| 2002 | Aug | 77.1°F | 75.0°F | +2.1° | NCLIMGRID | |
| 2002 | Sep | 71.3°F | 68.0°F | +3.2° | NCLIMGRID | |
| 2002 | Oct | 56.2°F | 56.9°F | -0.7° | NCLIMGRID | |
| 2002 | Nov | 44.6°F | 45.0°F | -0.4° | NCLIMGRID | |
| 2002 | Dec | 37.1°F | 35.3°F | +1.8° | NCLIMGRID | |
| 2003 | Jan | 29.9°F | 31.1°F | -1.2° | NCLIMGRID | |
| 2003 | Feb | 35.2°F | 36.0°F | -0.9° | NCLIMGRID | |
| 2003 | Mar | 47.4°F | 46.7°F | +0.7° | NCLIMGRID | |
| 2003 | Apr | 58.6°F | 56.4°F | +2.2° | NCLIMGRID | |
| 2003 | May | 65.4°F | 64.4°F | +1.0° | NCLIMGRID | |
| 2003 | Jun | 68.7°F | 72.2°F | -3.5° | NCLIMGRID | |
| 2003 | Jul | 77.8°F | 76.9°F | +0.9° | NCLIMGRID | |
| 2003 | Aug | 78.2°F | 75.0°F | +3.1° | NCLIMGRID | |
| 2003 | Sep | 65.9°F | 68.0°F | -2.1° | NCLIMGRID | |
| 2003 | Oct | 58.0°F | 56.9°F | +1.1° | NCLIMGRID | |
| 2003 | Nov | 50.4°F | 45.0°F | +5.5° | NCLIMGRID | |
| 2003 | Dec | 37.3°F | 35.3°F | +2.0° | NCLIMGRID | |
| 2004 | Jan | 34.4°F | 31.1°F | +3.3° | NCLIMGRID | |
| 2004 | Feb | 35.4°F | 36.0°F | -0.6° | NCLIMGRID | |
| 2004 | Mar | 50.9°F | 46.7°F | +4.2° | NCLIMGRID | |
| 2004 | Apr | 57.0°F | 56.4°F | +0.6° | NCLIMGRID | |
| 2004 | May | 68.6°F | 64.4°F | +4.2° | NCLIMGRID | |
| 2004 | Jun | 71.7°F | 72.2°F | -0.5° | NCLIMGRID | |
| 2004 | Jul | 74.9°F | 76.9°F | -2.0° | NCLIMGRID | |
| 2004 | Aug | 71.5°F | 75.0°F | -3.5° | NCLIMGRID | |
| 2004 | Sep | 68.7°F | 68.0°F | +0.7° | NCLIMGRID | |
| 2004 | Oct | 60.4°F | 56.9°F | +3.6° | NCLIMGRID | |
| 2004 | Nov | 50.2°F | 45.0°F | +5.2° | NCLIMGRID | |
| 2004 | Dec | 35.4°F | 35.3°F | +0.1° | NCLIMGRID | |
| 2005 | Jan | 39.4°F | 31.1°F | +8.2° | NCLIMGRID | |
| 2005 | Feb | 43.3°F | 36.0°F | +7.2° | NCLIMGRID | |
| 2005 | Mar | 45.5°F | 46.7°F | -1.2° | NCLIMGRID | |
| 2005 | Apr | 57.3°F | 56.4°F | +1.0° | NCLIMGRID | |
| 2005 | May | 63.5°F | 64.4°F | -0.8° | NCLIMGRID | |
| 2005 | Jun | 75.2°F | 72.2°F | +3.0° | NCLIMGRID | |
| 2005 | Jul | 77.4°F | 76.9°F | +0.5° | NCLIMGRID | |
| 2005 | Aug | 79.2°F | 75.0°F | +4.2° | NCLIMGRID | |
| 2005 | Sep | 73.0°F | 68.0°F | +4.9° | NCLIMGRID | |
| 2005 | Oct | 57.2°F | 56.9°F | +0.4° | NCLIMGRID | |
| 2005 | Nov | 48.4°F | 45.0°F | +3.4° | NCLIMGRID | |
| 2005 | Dec | 33.7°F | 35.3°F | -1.6° | NCLIMGRID | |
| 2006 | Jan | 42.9°F | 31.1°F | +11.7° | NCLIMGRID | |
| 2006 | Feb | 35.5°F | 36.0°F | -0.6° | NCLIMGRID | |
| 2006 | Mar | 48.2°F | 46.7°F | +1.5° | NCLIMGRID | |
| 2006 | Apr | 63.1°F | 56.4°F | +6.7° | NCLIMGRID | |
| 2006 | May | 65.7°F | 64.4°F | +1.3° | NCLIMGRID | |
| 2006 | Jun | 73.7°F | 72.2°F | +1.5° | NCLIMGRID | |
| 2006 | Jul | 77.7°F | 76.9°F | +0.9° | NCLIMGRID | |
| 2006 | Aug | 78.0°F | 75.0°F | +3.0° | NCLIMGRID | |
| 2006 | Sep | 65.3°F | 68.0°F | -2.7° | NCLIMGRID | |
| 2006 | Oct | 54.5°F | 56.9°F | -2.3° | NCLIMGRID | |
| 2006 | Nov | 46.9°F | 45.0°F | +2.0° | NCLIMGRID | |
| 2006 | Dec | 40.6°F | 35.3°F | +5.3° | NCLIMGRID | |
| 2007 | Jan | 34.6°F | 31.1°F | +3.5° | NCLIMGRID | |
| 2007 | Feb | 34.2°F | 36.0°F | -1.9° | NCLIMGRID | |
| 2007 | Mar | 55.9°F | 46.7°F | +9.2° | NCLIMGRID | |
| 2007 | Apr | 53.5°F | 56.4°F | -2.8° | NCLIMGRID | |
| 2007 | May | 68.5°F | 64.4°F | +4.2° | NCLIMGRID | |
| 2007 | Jun | 73.4°F | 72.2°F | +1.2° | NCLIMGRID | |
| 2007 | Jul | 74.8°F | 76.9°F | -2.1° | NCLIMGRID | |
| 2007 | Aug | 82.2°F | 75.0°F | +7.2° | NCLIMGRID | |
| 2007 | Sep | 71.7°F | 68.0°F | +3.7° | NCLIMGRID | |
| 2007 | Oct | 60.9°F | 56.9°F | +4.0° | NCLIMGRID | |
| 2007 | Nov | 47.7°F | 45.0°F | +2.7° | NCLIMGRID | |
| 2007 | Dec | 37.5°F | 35.3°F | +2.3° | NCLIMGRID | |
| 2008 | Jan | 32.8°F | 31.1°F | +1.7° | NCLIMGRID | |
| 2008 | Feb | 36.4°F | 36.0°F | +0.4° | NCLIMGRID | |
| 2008 | Mar | 46.1°F | 46.7°F | -0.6° | NCLIMGRID | |
| 2008 | Apr | 53.7°F | 56.4°F | -2.7° | NCLIMGRID | |
| 2008 | May | 63.7°F | 64.4°F | -0.7° | NCLIMGRID | |
| 2008 | Jun | 74.1°F | 72.2°F | +1.9° | NCLIMGRID | |
| 2008 | Jul | 77.1°F | 76.9°F | +0.2° | NCLIMGRID | |
| 2008 | Aug | 74.8°F | 75.0°F | -0.2° | NCLIMGRID | |
| 2008 | Sep | 68.2°F | 68.0°F | +0.2° | NCLIMGRID | |
| 2008 | Oct | 56.3°F | 56.9°F | -0.5° | NCLIMGRID | |
| 2008 | Nov | 43.5°F | 45.0°F | -1.5° | NCLIMGRID | |
| 2008 | Dec | 34.7°F | 35.3°F | -0.6° | NCLIMGRID | |
| 2009 | Jan | 31.7°F | 31.1°F | +0.5° | NCLIMGRID | |
| 2009 | Feb | 40.5°F | 36.0°F | +4.4° | NCLIMGRID | |
| 2009 | Mar | 49.8°F | 46.7°F | +3.1° | NCLIMGRID | |
| 2009 | Apr | 55.3°F | 56.4°F | -1.1° | NCLIMGRID | |
| 2009 | May | 63.8°F | 64.4°F | -0.6° | NCLIMGRID | |
| 2009 | Jun | 75.5°F | 72.2°F | +3.2° | NCLIMGRID | |
| 2009 | Jul | 72.9°F | 76.9°F | -4.0° | NCLIMGRID | |
| 2009 | Aug | 72.8°F | 75.0°F | -2.2° | NCLIMGRID | |
| 2009 | Sep | 68.1°F | 68.0°F | +0.1° | NCLIMGRID | |
| 2009 | Oct | 53.0°F | 56.9°F | -3.8° | NCLIMGRID | |
| 2009 | Nov | 50.7°F | 45.0°F | +5.8° | NCLIMGRID | |
| 2009 | Dec | 32.7°F | 35.3°F | -2.5° | NCLIMGRID | |
| 2010 | Jan | 30.8°F | 31.1°F | -0.4° | NCLIMGRID | |
| 2010 | Feb | 32.0°F | 36.0°F | -4.1° | NCLIMGRID | |
| 2010 | Mar | 48.1°F | 46.7°F | +1.3° | NCLIMGRID | |
| 2010 | Apr | 60.9°F | 56.4°F | +4.5° | NCLIMGRID | |
| 2010 | May | 66.6°F | 64.4°F | +2.2° | NCLIMGRID | |
| 2010 | Jun | 78.6°F | 72.2°F | +6.4° | NCLIMGRID | |
| 2010 | Jul | 80.3°F | 76.9°F | +3.5° | NCLIMGRID | |
| 2010 | Aug | 80.4°F | 75.0°F | +5.4° | NCLIMGRID | |
| 2010 | Sep | 69.7°F | 68.0°F | +1.7° | NCLIMGRID | |
| 2010 | Oct | 58.4°F | 56.9°F | +1.5° | NCLIMGRID | |
| 2010 | Nov | 48.3°F | 45.0°F | +3.3° | NCLIMGRID | |
| 2010 | Dec | 32.3°F | 35.3°F | -2.9° | NCLIMGRID | |
| 2011 | Jan | 31.5°F | 31.1°F | +0.3° | NCLIMGRID | |
| 2011 | Feb | 37.8°F | 36.0°F | +1.8° | NCLIMGRID | |
| 2011 | Mar | 48.1°F | 46.7°F | +1.4° | NCLIMGRID | |
| 2011 | Apr | 59.6°F | 56.4°F | +3.2° | NCLIMGRID | |
| 2011 | May | 63.6°F | 64.4°F | -0.7° | NCLIMGRID | |
| 2011 | Jun | 77.0°F | 72.2°F | +4.8° | NCLIMGRID | |
| 2011 | Jul | 81.0°F | 76.9°F | +4.1° | NCLIMGRID | |
| 2011 | Aug | 77.9°F | 75.0°F | +2.9° | NCLIMGRID | |
| 2011 | Sep | 65.5°F | 68.0°F | -2.5° | NCLIMGRID | |
| 2011 | Oct | 57.2°F | 56.9°F | +0.4° | NCLIMGRID | |
| 2011 | Nov | 50.0°F | 45.0°F | +5.0° | NCLIMGRID | |
| 2011 | Dec | 39.3°F | 35.3°F | +4.0° | NCLIMGRID | |
| 2012 | Jan | 38.3°F | 31.1°F | +7.2° | NCLIMGRID | |
| 2012 | Feb | 42.2°F | 36.0°F | +6.1° | NCLIMGRID | |
| 2012 | Mar | 59.3°F | 46.7°F | +12.5° | NCLIMGRID | |
| 2012 | Apr | 60.9°F | 56.4°F | +4.5° | NCLIMGRID | |
| 2012 | May | 70.2°F | 64.4°F | +5.8° | NCLIMGRID | |
| 2012 | Jun | 73.6°F | 72.2°F | +1.4° | NCLIMGRID | |
| 2012 | Jul | 82.3°F | 76.9°F | +5.4° | NCLIMGRID | |
| 2012 | Aug | 76.0°F | 75.0°F | +1.0° | NCLIMGRID | |
| 2012 | Sep | 68.0°F | 68.0°F | -0.1° | NCLIMGRID | |
| 2012 | Oct | 54.8°F | 56.9°F | -2.1° | NCLIMGRID | |
| 2012 | Nov | 44.5°F | 45.0°F | -0.5° | NCLIMGRID | |
| 2012 | Dec | 40.8°F | 35.3°F | +5.6° | NCLIMGRID | |
| 2013 | Jan | 36.5°F | 31.1°F | +5.3° | NCLIMGRID | |
| 2013 | Feb | 37.7°F | 36.0°F | +1.7° | NCLIMGRID | |
| 2013 | Mar | 40.5°F | 46.7°F | -6.2° | NCLIMGRID | |
| 2013 | Apr | 54.9°F | 56.4°F | -1.5° | NCLIMGRID | |
| 2013 | May | 64.2°F | 64.4°F | -0.2° | NCLIMGRID | |
| 2013 | Jun | 72.4°F | 72.2°F | +0.2° | NCLIMGRID | |
| 2013 | Jul | 73.5°F | 76.9°F | -3.4° | NCLIMGRID | |
| 2013 | Aug | 73.8°F | 75.0°F | -1.3° | NCLIMGRID | |
| 2013 | Sep | 71.0°F | 68.0°F | +3.0° | NCLIMGRID | |
| 2013 | Oct | 58.1°F | 56.9°F | +1.2° | NCLIMGRID | |
| 2013 | Nov | 44.2°F | 45.0°F | -0.8° | NCLIMGRID | |
| 2013 | Dec | 33.5°F | 35.3°F | -1.7° | NCLIMGRID | |
| 2014 | Jan | 28.4°F | 31.1°F | -2.7° | NCLIMGRID | |
| 2014 | Feb | 31.4°F | 36.0°F | -4.7° | NCLIMGRID | |
| 2014 | Mar | 41.5°F | 46.7°F | -5.2° | NCLIMGRID | |
| 2014 | Apr | 56.5°F | 56.4°F | +0.2° | NCLIMGRID | |
| 2014 | May | 65.3°F | 64.4°F | +1.0° | NCLIMGRID | |
| 2014 | Jun | 73.3°F | 72.2°F | +1.1° | NCLIMGRID | |
| 2014 | Jul | 72.0°F | 76.9°F | -4.9° | NCLIMGRID | |
| 2014 | Aug | 77.6°F | 75.0°F | +2.6° | NCLIMGRID | |
| 2014 | Sep | 68.0°F | 68.0°F | +0.0° | NCLIMGRID | |
| 2014 | Oct | 59.2°F | 56.9°F | +2.3° | NCLIMGRID | |
| 2014 | Nov | 39.9°F | 45.0°F | -5.0° | NCLIMGRID | |
| 2014 | Dec | 38.9°F | 35.3°F | +3.7° | NCLIMGRID | |
| 2015 | Jan | 34.8°F | 31.1°F | +3.6° | NCLIMGRID | |
| 2015 | Feb | 30.3°F | 36.0°F | -5.8° | NCLIMGRID | |
| 2015 | Mar | 46.4°F | 46.7°F | -0.3° | NCLIMGRID | |
| 2015 | Apr | 60.2°F | 56.4°F | +3.8° | NCLIMGRID | |
| 2015 | May | 66.6°F | 64.4°F | +2.2° | NCLIMGRID | |
| 2015 | Jun | 75.4°F | 72.2°F | +3.2° | NCLIMGRID | |
| 2015 | Jul | 79.6°F | 76.9°F | +2.7° | NCLIMGRID | |
| 2015 | Aug | 73.6°F | 75.0°F | -1.4° | NCLIMGRID | |
| 2015 | Sep | 71.1°F | 68.0°F | +3.0° | NCLIMGRID | |
| 2015 | Oct | 59.0°F | 56.9°F | +2.2° | NCLIMGRID | |
| 2015 | Nov | 50.6°F | 45.0°F | +5.6° | NCLIMGRID | |
| 2015 | Dec | 45.6°F | 35.3°F | +10.3° | NCLIMGRID | |
| 2016 | Jan | 35.3°F | 31.1°F | +4.1° | NCLIMGRID | |
| 2016 | Feb | 42.8°F | 36.0°F | +6.8° | NCLIMGRID | |
| 2016 | Mar | 52.4°F | 46.7°F | +5.7° | NCLIMGRID | |
| 2016 | Apr | 59.8°F | 56.4°F | +3.5° | NCLIMGRID | |
| 2016 | May | 64.1°F | 64.4°F | -0.3° | NCLIMGRID | |
| 2016 | Jun | 76.7°F | 72.2°F | +4.5° | NCLIMGRID | |
| 2016 | Jul | 79.9°F | 76.9°F | +3.0° | NCLIMGRID | |
| 2016 | Aug | 77.5°F | 75.0°F | +2.5° | NCLIMGRID | |
| 2016 | Sep | 72.7°F | 68.0°F | +4.7° | NCLIMGRID | |
| 2016 | Oct | 63.5°F | 56.9°F | +6.6° | NCLIMGRID | |
| 2016 | Nov | 52.0°F | 45.0°F | +7.0° | NCLIMGRID | |
| 2016 | Dec | 37.2°F | 35.3°F | +1.9° | NCLIMGRID | |
| 2017 | Jan | 40.2°F | 31.1°F | +9.1° | NCLIMGRID | |
| 2017 | Feb | 48.3°F | 36.0°F | +12.2° | NCLIMGRID | |
| 2017 | Mar | 51.5°F | 46.7°F | +4.8° | NCLIMGRID | |
| 2017 | Apr | 61.5°F | 56.4°F | +5.2° | NCLIMGRID | |
| 2017 | May | 65.6°F | 64.4°F | +1.3° | NCLIMGRID | |
| 2017 | Jun | 73.2°F | 72.2°F | +1.0° | NCLIMGRID | |
| 2017 | Jul | 79.1°F | 76.9°F | +2.2° | NCLIMGRID | |
| 2017 | Aug | 74.0°F | 75.0°F | -1.0° | NCLIMGRID | |
| 2017 | Sep | 71.2°F | 68.0°F | +3.2° | NCLIMGRID | |
| 2017 | Oct | 60.2°F | 56.9°F | +3.3° | NCLIMGRID | |
| 2017 | Nov | 50.0°F | 45.0°F | +5.1° | NCLIMGRID | |
| 2017 | Dec | 37.2°F | 35.3°F | +1.9° | NCLIMGRID | |
| 2018 | Jan | 31.1°F | 31.1°F | -0.1° | NCLIMGRID | |
| 2018 | Feb | 40.8°F | 36.0°F | +4.7° | NCLIMGRID | |
| 2018 | Mar | 47.9°F | 46.7°F | +1.2° | NCLIMGRID | |
| 2018 | Apr | 51.6°F | 56.4°F | -4.7° | NCLIMGRID | |
| 2018 | May | 72.5°F | 64.4°F | +8.1° | NCLIMGRID | |
| 2018 | Jun | 77.4°F | 72.2°F | +5.2° | NCLIMGRID | |
| 2018 | Jul | 79.3°F | 76.9°F | +2.4° | NCLIMGRID | |
| 2018 | Aug | 76.4°F | 75.0°F | +1.3° | NCLIMGRID | |
| 2018 | Sep | 72.6°F | 68.0°F | +4.6° | NCLIMGRID | |
| 2018 | Oct | 58.8°F | 56.9°F | +1.9° | NCLIMGRID | |
| 2018 | Nov | 41.8°F | 45.0°F | -3.2° | NCLIMGRID | |
| 2018 | Dec | 40.1°F | 35.3°F | +4.8° | NCLIMGRID | |
| 2019 | Jan | 36.1°F | 31.1°F | +4.9° | NCLIMGRID | |
| 2019 | Feb | 41.1°F | 36.0°F | +5.1° | NCLIMGRID | |
| 2019 | Mar | 44.3°F | 46.7°F | -2.4° | NCLIMGRID | |
| 2019 | Apr | 59.4°F | 56.4°F | +3.0° | NCLIMGRID | |
| 2019 | May | 67.2°F | 64.4°F | +2.8° | NCLIMGRID | |
| 2019 | Jun | 72.6°F | 72.2°F | +0.4° | NCLIMGRID | |
| 2019 | Jul | 77.5°F | 76.9°F | +0.6° | NCLIMGRID | |
| 2019 | Aug | 76.9°F | 75.0°F | +1.8° | NCLIMGRID | |
| 2019 | Sep | 76.1°F | 68.0°F | +8.1° | NCLIMGRID | |
| 2019 | Oct | 57.4°F | 56.9°F | +0.5° | NCLIMGRID | |
| 2019 | Nov | 42.5°F | 45.0°F | -2.5° | NCLIMGRID | |
| 2019 | Dec | 41.9°F | 35.3°F | +6.7° | NCLIMGRID | |
| 2020 | Jan | 39.7°F | 31.1°F | +8.6° | NCLIMGRID | |
| 2020 | Feb | 40.0°F | 36.0°F | +4.0° | NCLIMGRID | |
| 2020 | Mar | 52.5°F | 46.7°F | +5.8° | NCLIMGRID | |
| 2020 | Apr | 56.1°F | 56.4°F | -0.2° | NCLIMGRID | |
| 2020 | May | 63.8°F | 64.4°F | -0.5° | NCLIMGRID | |
| 2020 | Jun | 74.2°F | 72.2°F | +2.0° | NCLIMGRID | |
| 2020 | Jul | 80.5°F | 76.9°F | +3.6° | NCLIMGRID | |
| 2020 | Aug | 75.4°F | 75.0°F | +0.4° | NCLIMGRID | |
| 2020 | Sep | 69.5°F | 68.0°F | +1.5° | NCLIMGRID | |
| 2020 | Oct | 56.2°F | 56.9°F | -0.7° | NCLIMGRID | |
| 2020 | Nov | 51.5°F | 45.0°F | +6.6° | NCLIMGRID | |
| 2020 | Dec | 39.1°F | 35.3°F | +3.8° | NCLIMGRID | |
| 2021 | Jan | 37.5°F | 31.1°F | +6.4° | NCLIMGRID | |
| 2021 | Feb | 30.0°F | 36.0°F | -6.0° | NCLIMGRID | |
| 2021 | Mar | 52.7°F | 46.7°F | +6.0° | NCLIMGRID | |
| 2021 | Apr | 56.7°F | 56.4°F | +0.3° | NCLIMGRID | |
| 2021 | May | 64.1°F | 64.4°F | -0.2° | NCLIMGRID | |
| 2021 | Jun | 74.8°F | 72.2°F | +2.6° | NCLIMGRID | |
| 2021 | Jul | 77.8°F | 76.9°F | +1.0° | NCLIMGRID | |
| 2021 | Aug | 78.7°F | 75.0°F | +3.7° | NCLIMGRID | |
| 2021 | Sep | 72.6°F | 68.0°F | +4.6° | NCLIMGRID | |
| 2021 | Oct | 62.9°F | 56.9°F | +6.0° | NCLIMGRID | |
| 2021 | Nov | 47.3°F | 45.0°F | +2.4° | NCLIMGRID | |
| 2021 | Dec | 48.7°F | 35.3°F | +13.5° | NCLIMGRID | |
| 2022 | Jan | 33.5°F | 31.1°F | +2.4° | NCLIMGRID | |
| 2022 | Feb | 37.8°F | 36.0°F | +1.8° | NCLIMGRID | |
| 2022 | Mar | 49.8°F | 46.7°F | +3.1° | NCLIMGRID | |
| 2022 | Apr | 56.5°F | 56.4°F | +0.2° | NCLIMGRID | |
| 2022 | May | 67.6°F | 64.4°F | +3.2° | NCLIMGRID | |
| 2022 | Jun | 75.3°F | 72.2°F | +3.1° | NCLIMGRID | |
| 2022 | Jul | 82.3°F | 76.9°F | +5.4° | NCLIMGRID | |
| 2022 | Aug | 76.0°F | 75.0°F | +1.0° | NCLIMGRID | |
| 2022 | Sep | 70.8°F | 68.0°F | +2.8° | NCLIMGRID | |
| 2022 | Oct | 58.1°F | 56.9°F | +1.3° | NCLIMGRID | |
| 2022 | Nov | 47.2°F | 45.0°F | +2.2° | NCLIMGRID | |
| 2022 | Dec | 37.4°F | 35.3°F | +2.2° | NCLIMGRID | |
| 2023 | Jan | 41.5°F | 31.1°F | +10.4° | NCLIMGRID | |
| 2023 | Feb | 45.0°F | 36.0°F | +9.0° | NCLIMGRID | |
| 2023 | Mar | 48.1°F | 46.7°F | +1.4° | NCLIMGRID | |
| 2023 | Apr | 59.0°F | 56.4°F | +2.6° | NCLIMGRID | |
| 2023 | May | 67.6°F | 64.4°F | +3.2° | NCLIMGRID | |
| 2023 | Jun | 74.7°F | 72.2°F | +2.5° | NCLIMGRID | |
| 2023 | Jul | 79.0°F | 76.9°F | +2.1° | NCLIMGRID | |
| 2023 | Aug | 77.8°F | 75.0°F | +2.8° | NCLIMGRID | |
| 2023 | Sep | 71.2°F | 68.0°F | +3.2° | NCLIMGRID | |
| 2023 | Oct | 60.9°F | 56.9°F | +4.0° | NCLIMGRID | |
| 2023 | Nov | 48.4°F | 45.0°F | +3.4° | NCLIMGRID | |
| 2023 | Dec | 43.2°F | 35.3°F | +8.0° | NCLIMGRID | |
| 2024 | Jan | 31.1°F | 31.1°F | +0.0° | NCLIMGRID | |
| 2024 | Feb | 48.4°F | 36.0°F | +12.4° | NCLIMGRID | |
| 2024 | Mar | 53.0°F | 46.7°F | +6.3° | NCLIMGRID | |
| 2024 | Apr | 61.1°F | 56.4°F | +4.7° | NCLIMGRID | |
| 2024 | May | 70.4°F | 64.4°F | +6.1° | NCLIMGRID | |
| 2024 | Jun | 75.5°F | 72.2°F | +3.3° | NCLIMGRID | |
| 2024 | Jul | 76.7°F | 76.9°F | -0.2° | NCLIMGRID | |
| 2024 | Aug | 76.6°F | 75.0°F | +1.5° | NCLIMGRID | |
| 2024 | Sep | 70.7°F | 68.0°F | +2.7° | NCLIMGRID | |
| 2024 | Oct | 61.4°F | 56.9°F | +4.6° | NCLIMGRID | |
| 2024 | Nov | 52.0°F | 45.0°F | +7.0° | NCLIMGRID | |
| 2024 | Dec | 41.3°F | 35.3°F | +6.1° | NCLIMGRID | |
| 2025 | Jan | 30.6°F | 31.1°F | -0.5° | NCLIMGRID | |
| 2025 | Feb | 38.3°F | 36.0°F | +2.3° | NCLIMGRID | |
| 2025 | Mar | 54.0°F | 46.7°F | +7.3° | NCLIMGRID | |
| 2025 | Apr | 59.3°F | 56.4°F | +3.0° | NCLIMGRID | |
| 2025 | May | 65.3°F | 64.4°F | +1.0° | NCLIMGRID | |
| 2025 | Jun | 75.7°F | 72.2°F | +3.5° | NCLIMGRID | |
| 2025 | Jul | 80.2°F | 76.9°F | +3.3° | NCLIMGRID | |
| 2025 | Aug | 75.9°F | 75.0°F | +0.8° | NCLIMGRID | |
| 2025 | Sep | 72.5°F | 68.0°F | +4.5° | NCLIMGRID | |
| 2025 | Oct | 61.9°F | 56.9°F | +5.0° | NCLIMGRID | |
| 2025 | Nov | 50.6°F | 45.0°F | +5.6° | NCLIMGRID | |
| 2025 | Dec | 39.2°F | 35.3°F | +3.9° | NCLIMGRID | |
| 2026 | Jan | 33.0°F | 31.1°F | +1.8° | NCLIMGRID | |
| 2026 | Feb | 42.0°F | 36.0°F | +5.9° | NCLIMGRID |
Showing 1,154 of 1,154 records. = gap-filled data
This table shows raw (unsmoothed) monthly anomalies. The spiral applies a 12-month moving average to highlight long-term trends.
Methodology
Methodology How we calculate anomalies
1. Data Acquisition
We use NOAA's nClimGrid dataset, which provides homogenized temperature data on a 5km grid, for the nearest grid point with historical coverage starting from 1930.
Temperature metric: Monthly average temperature (TAVG). When TAVG is unavailable, we use (TMAX + TMIN) / 2 as a proxy.
2. Gap Filling
Some months may have missing data. We fill gaps using data from nearby weather stations (within ~200km).
10
Initial gaps
0
Filled
10
Unfillable
3. Baseline Calculation
The baseline is a 25-year window dynamically centered on the data's midpoint, requiring at least 90% coverage. If coverage is insufficient, the window shifts forward in 5-year increments until the threshold is met.
Period: 1966 – 1991 (100% coverage)
| Month | Baseline | Years |
|---|---|---|
| January | 31.1°F | 26/26 |
| February | 36.0°F | 26/26 |
| March | 46.7°F | 26/26 |
| April | 56.4°F | 26/26 |
| May | 64.4°F | 26/26 |
| June | 72.2°F | 26/26 |
| July | 76.9°F | 26/26 |
| August | 75.0°F | 26/26 |
| September | 68.0°F | 26/26 |
| October | 56.9°F | 26/26 |
| November | 45.0°F | 26/26 |
| December | 35.3°F | 26/26 |
4. Anomaly Calculation
For each month, we calculate how far it deviates from the baseline. These are raw monthly anomalies.
Anomaly = Actual Temperature − Baseline[month]
5. Smoothing
The spiral visualization applies a 12-month centered moving average to reduce month-to-month noise and highlight multi-year warming trends. The spiral shows smoothed values, not raw anomalies.
6. Reading the Visualizations
Spiral: A 3D helix where each loop represents one year. The radius indicates the smoothed temperature anomaly, and colors range from blue (cold) to red (warm). The top view shows the annual cycle, while the side view shows time progression.
Stripes: Each stripe represents one year's average anomaly (the mean of all monthly anomalies for that year). No additional smoothing is applied; yearly aggregation naturally reduces noise.
Color scale: Color bounds are set to the 5th and 95th percentile of anomalies to avoid outlier washout, with a neutral zone of approximately ±0.1°C.
7. Data Quality Notes
Frequently Asked Questions
Is Alton, Missouri getting warmer?
Based on 96+ years of NOAA temperature records, Alton has warmed at a rate of approximately 0.18°F per decade. This trend is calculated from monthly temperature anomalies relative to the location's historical baseline period.
What was the warmest year on record in Alton?
The warmest year on record in Alton was 2024, based on average annual temperature anomaly from NOAA station data.
Where does the temperature data for Alton come from?
Data comes from the nClimGrid 5km Grid Point weather station, part of NOAA's Global Historical Climatology Network. This station has recorded 96+ years of temperature observations used to build Alton's climate profile.
How are the climate visualizations for Alton created?
Three visualizations are generated from Alton's NOAA data: a climate spiral showing monthly temperature anomalies as concentric rings (inspired by NASA), warming stripes where each vertical stripe represents one year's temperature anomaly, and a linear trend chart showing the long-term trajectory.
Can I download Alton's temperature data?
Yes. The interactive data table on this page shows every monthly temperature reading in Alton's record. You can filter by decade and download the complete dataset as a CSV file for your own analysis.
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