Based on our analysis of 64 years of temperature data near Captain Cook, HI, this area shows relatively stable temperatures of approximately -0.2°F per decade. 2 of the last 10 years recorded above-average temperatures, and 1996 was the warmest year on record at +1.4°F above the historical baseline.
Key Climate Facts
Rate of Change
-0.1°F
per decade
Warmest Year
1996
+1.4°F anomaly
Recent Warm Years
2 / 10
above-average years
Decade Shift
-1.2°F
2010s vs 1950s
Compared to the National Average
Captain Cook is warming 0.1°F/decade slower than the national average.
National: +0.20°F/decade
Captain Cook: -0.15°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 Captain Cook'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 -0.15°F per decade quantifies the rate of change.
Temperature by Decade
1950s
-1.80°F
1960s
-1.07°F
1970s
-1.69°F
1980s
+0.30°F
1990s
+0.15°F
2000s
-1.19°F
2010s
-2.97°F
Average temperature anomaly per decade relative to the historical baseline period.
Anomaly Scale
-4.0°F Colder Normal +1.6°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 Captain Cook, HI. Filter by decade or download as CSV.
Data Sources & Audit
- Station
- OPIHIHALE NUMBER 2 24.1, HI US
- Distance
- 6.7 mi
- Coverage
- 93.2%
- Records
- 716
- Range
- 1956-01 – 2019-12
- Gap-filled
- 52 from 6 stations
Full Data Audit 768 records
| Year | Month | Temp | Baseline | Anomaly | Source | Gap |
|---|---|---|---|---|---|---|
| 1956 | Jan | 64.7°F | 66.7°F | -2.0° | USC00516697 | |
| 1956 | Feb | 63.3°F | 67.2°F | -3.8° | USC00516697 | |
| 1956 | Mar | 64.4°F | 67.7°F | -3.4° | USC00516697 | |
| 1956 | Apr | 64.9°F | 68.8°F | -3.9° | USC00516697 | |
| 1956 | May | 70.8°F | 70.0°F | +0.8° | USC00516697 | |
| 1956 | Jun | 67.2°F | 70.9°F | -3.7° | USC00516697 | |
| 1956 | Jul | 70.6°F | 72.0°F | -1.3° | USC00517166 | |
| 1956 | Aug | 72.6°F | 72.6°F | +0.0° | USC00517166 | |
| 1956 | Sep | 68.4°F | 72.4°F | -4.0° | USC00516697 | |
| 1956 | Oct | 65.7°F | 71.9°F | -6.2° | USC00512751 | |
| 1956 | Nov | 64.1°F | 70.4°F | -6.3° | USC00512751 | |
| 1956 | Dec | 65.0°F | 68.4°F | -3.4° | USC00516697 | |
| 1957 | Jan | 66.4°F | 66.7°F | -0.2° | USC00517166 | |
| 1957 | Feb | 63.8°F | 67.2°F | -3.4° | USC00517166 | |
| 1957 | Mar | 64.9°F | 67.7°F | -2.8° | USC00517166 | |
| 1957 | Apr | 67.1°F | 68.8°F | -1.7° | USC00517166 | |
| 1957 | May | 68.2°F | 70.0°F | -1.8° | USC00517166 | |
| 1957 | Jun | 69.6°F | 70.9°F | -1.3° | USC00517166 | |
| 1957 | Jul | 70.4°F | 72.0°F | -1.6° | USC00517166 | |
| 1957 | Aug | 72.1°F | 72.6°F | -0.5° | USC00517166 | |
| 1957 | Sep | 72.0°F | 72.4°F | -0.4° | USC00517166 | |
| 1957 | Oct | 71.0°F | 71.9°F | -0.9° | USC00517166 | |
| 1957 | Nov | 69.9°F | 70.4°F | -0.5° | USC00517166 | |
| 1957 | Dec | 67.8°F | 68.4°F | -0.7° | USC00517166 | |
| 1958 | Jan | 64.4°F | 66.7°F | -2.3° | USC00517166 | |
| 1958 | Feb | 65.6°F | 67.2°F | -1.6° | USC00517166 | |
| 1958 | Mar | 66.2°F | 67.7°F | -1.5° | USC00517166 | |
| 1958 | Apr | 67.5°F | 68.8°F | -1.3° | USC00517166 | |
| 1958 | May | 68.5°F | 70.0°F | -1.5° | USC00517166 | |
| 1958 | Jun | 69.5°F | 70.9°F | -1.4° | USC00517166 | |
| 1958 | Jul | 70.6°F | 72.0°F | -1.4° | USC00517166 | |
| 1958 | Aug | 72.1°F | 72.6°F | -0.4° | USC00517166 | |
| 1958 | Sep | 71.7°F | 72.4°F | -0.6° | USC00517166 | |
| 1958 | Oct | 70.1°F | 71.9°F | -1.8° | USC00517166 | |
| 1958 | Nov | 69.3°F | 70.4°F | -1.1° | USC00517166 | |
| 1958 | Dec | 66.1°F | 68.4°F | -2.3° | USC00517166 | |
| 1959 | Jan | 68.0°F | 66.7°F | +1.3° | USC00517166 | |
| 1959 | Feb | 66.0°F | 67.2°F | -1.2° | USC00517166 | |
| 1959 | Mar | 67.2°F | 67.7°F | -0.6° | USC00517166 | |
| 1959 | Apr | 68.4°F | 68.8°F | -0.3° | USC00517166 | |
| 1959 | May | 69.2°F | 70.0°F | -0.8° | USC00517166 | |
| 1959 | Jun | 69.9°F | 70.9°F | -1.0° | USC00517166 | |
| 1959 | Jul | 69.9°F | 72.0°F | -2.1° | USC00516697 | |
| 1959 | Aug | 69.7°F | 72.6°F | -2.8° | USC00516697 | |
| 1959 | Sep | 69.9°F | 72.4°F | -2.5° | USC00516697 | |
| 1959 | Oct | 69.1°F | 71.9°F | -2.7° | USC00516697 | |
| 1959 | Nov | 69.3°F | 70.4°F | -1.1° | USC00517166 | |
| 1959 | Dec | 66.2°F | 68.4°F | -2.2° | USC00517166 | |
| 1960 | Jan | 65.2°F | 66.7°F | -1.4° | USC00517166 | |
| 1960 | Feb | 65.5°F | 67.2°F | -1.7° | USC00517166 | |
| 1960 | Mar | 66.6°F | 67.7°F | -1.2° | USC00517166 | |
| 1960 | Apr | 68.1°F | 68.8°F | -0.6° | USC00517166 | |
| 1960 | May | 69.4°F | 70.0°F | -0.6° | USC00517166 | |
| 1960 | Jun | 70.2°F | 70.9°F | -0.7° | USC00517166 | |
| 1960 | Jul | 70.6°F | 72.0°F | -1.3° | USC00517166 | |
| 1960 | Aug | 72.1°F | 72.6°F | -0.5° | USC00517166 | |
| 1960 | Sep | 71.2°F | 72.4°F | -1.2° | USC00517166 | |
| 1960 | Oct | 71.1°F | 71.9°F | -0.7° | USC00517166 | |
| 1960 | Nov | 68.4°F | 70.4°F | -2.0° | USC00517166 | |
| 1960 | Dec | 66.8°F | 68.4°F | -1.6° | USC00517166 | |
| 1961 | Jan | 66.4°F | 66.7°F | -0.3° | USC00517166 | |
| 1961 | Feb | 67.6°F | 67.2°F | +0.4° | USC00517166 | |
| 1961 | Mar | 67.4°F | 67.7°F | -0.3° | USC00517166 | |
| 1961 | Apr | 67.6°F | 68.8°F | -1.2° | USC00517166 | |
| 1961 | May | 69.5°F | 70.0°F | -0.4° | USC00517166 | |
| 1961 | Jun | 69.5°F | 70.9°F | -1.4° | USC00517166 | |
| 1961 | Jul | 70.1°F | 72.0°F | -1.9° | USC00517166 | |
| 1961 | Aug | 71.3°F | 72.6°F | -1.3° | USC00517166 | |
| 1961 | Sep | 70.6°F | 72.4°F | -1.8° | USC00517166 | |
| 1961 | Oct | 68.0°F | 71.9°F | -3.9° | USC00513977 | |
| 1961 | Nov | 67.6°F | 70.4°F | -2.8° | USC00517166 | |
| 1961 | Dec | 65.8°F | 68.4°F | -2.6° | USC00517166 | |
| 1962 | Jan | 66.2°F | 66.7°F | -0.4° | USC00517166 | |
| 1962 | Feb | 65.4°F | 67.2°F | -1.7° | USC00517166 | |
| 1962 | Mar | 66.8°F | 67.7°F | -0.9° | USC00517166 | |
| 1962 | Apr | 64.4°F | 68.8°F | -4.3° | USC00513977 | |
| 1962 | May | 69.0°F | 70.0°F | -0.9° | USC00517166 | |
| 1962 | Jun | 69.5°F | 70.9°F | -1.4° | USC00517166 | |
| 1962 | Jul | 69.8°F | 72.0°F | -2.2° | USC00517166 | |
| 1962 | Aug | 70.8°F | 72.6°F | -1.7° | USC00517166 | |
| 1962 | Sep | 70.2°F | 72.4°F | -2.2° | USC00517166 | |
| 1962 | Oct | 70.0°F | 71.9°F | -1.8° | USC00517166 | |
| 1962 | Nov | 68.2°F | 70.4°F | -2.2° | USC00517166 | |
| 1962 | Dec | 66.0°F | 68.4°F | -2.4° | USC00517166 | |
| 1963 | Jan | 65.3°F | 66.7°F | -1.3° | USC00517166 | |
| 1963 | Feb | 66.8°F | 67.2°F | -0.3° | USC00517166 | |
| 1963 | Mar | 68.3°F | 67.7°F | +0.6° | USC00517166 | |
| 1963 | Apr | 68.8°F | 68.8°F | +0.1° | USC00517166 | |
| 1963 | May | 68.9°F | 70.0°F | -1.1° | USC00517166 | |
| 1963 | Jun | 69.8°F | 70.9°F | -1.1° | USC00517166 | |
| 1963 | Jul | 70.6°F | 72.0°F | -1.4° | USC00517166 | |
| 1963 | Aug | 71.2°F | 72.6°F | -1.4° | USC00517166 | |
| 1963 | Sep | 71.1°F | 72.4°F | -1.3° | USC00517166 | |
| 1963 | Oct | 70.4°F | 71.9°F | -1.4° | USC00517166 | |
| 1963 | Nov | 68.6°F | 70.4°F | -1.8° | USC00517166 | |
| 1963 | Dec | 67.4°F | 68.4°F | -1.1° | USC00517166 | |
| 1964 | Jan | 66.7°F | 66.7°F | +0.0° | USC00517166 | |
| 1964 | Feb | 64.9°F | 67.2°F | -2.2° | USC00517166 | |
| 1964 | Mar | 66.3°F | 67.7°F | -1.4° | USC00517166 | |
| 1964 | Apr | 67.2°F | 68.8°F | -1.6° | USC00517166 | |
| 1964 | May | 68.1°F | 70.0°F | -1.9° | USC00517166 | |
| 1964 | Jun | 70.6°F | 70.9°F | -0.3° | USC00517166 | |
| 1964 | Jul | 70.6°F | 72.0°F | -1.4° | USC00517166 | |
| 1964 | Aug | 69.7°F | 72.6°F | -2.9° | USC00517166 | |
| 1964 | Sep | 70.2°F | 72.4°F | -2.2° | USC00517166 | |
| 1964 | Oct | 69.9°F | 71.9°F | -2.0° | USC00517166 | |
| 1964 | Nov | 68.8°F | 70.4°F | -1.6° | USC00517166 | |
| 1964 | Dec | 68.4°F | 68.4°F | -0.1° | USC00517166 | |
| 1965 | Jan | 66.5°F | 66.7°F | -0.1° | USC00517166 | |
| 1965 | Feb | 63.4°F | 67.2°F | -3.8° | USC00517166 | |
| 1965 | Mar | 65.6°F | 67.7°F | -2.1° | USC00517166 | |
| 1965 | Apr | 68.0°F | 68.8°F | -0.8° | USC00517166 | |
| 1965 | May | 69.9°F | 70.0°F | -0.1° | USC00517166 | |
| 1965 | Jun | 69.3°F | 70.9°F | -1.7° | USC00517166 | |
| 1965 | Jul | 70.1°F | 72.0°F | -1.9° | USC00517166 | |
| 1965 | Aug | 70.2°F | 72.6°F | -2.4° | USC00517166 | |
| 1965 | Sep | 70.6°F | 72.4°F | -1.8° | USC00517166 | |
| 1965 | Oct | 70.4°F | 71.9°F | -1.5° | USC00517166 | |
| 1965 | Nov | 69.7°F | 70.4°F | -0.7° | USC00517166 | |
| 1965 | Dec | 65.8°F | 68.4°F | -2.6° | USC00517166 | |
| 1966 | Jan | 64.0°F | 66.7°F | -2.6° | USC00517166 | |
| 1966 | Feb | 66.1°F | 67.2°F | -1.1° | USC00517166 | |
| 1966 | Mar | 66.5°F | 67.7°F | -1.2° | USC00517166 | |
| 1966 | Apr | 67.2°F | 68.8°F | -1.6° | USC00517166 | |
| 1966 | May | 69.5°F | 70.0°F | -0.5° | USC00517166 | |
| 1966 | Jun | 70.7°F | 70.9°F | -0.2° | USC00517166 | |
| 1966 | Jul | 70.9°F | 72.0°F | -1.1° | USC00517166 | |
| 1966 | Aug | 72.3°F | 72.6°F | -0.3° | USC00517166 | |
| 1966 | Sep | 71.3°F | 72.4°F | -1.0° | USC00517166 | |
| 1966 | Oct | 71.2°F | 71.9°F | -0.7° | USC00517166 | |
| 1966 | Nov | 69.8°F | 70.4°F | -0.6° | USC00517166 | |
| 1966 | Dec | 67.4°F | 68.4°F | -1.0° | USC00517166 | |
| 1967 | Jan | 65.4°F | 66.7°F | -1.2° | USC00517166 | |
| 1967 | Feb | 65.9°F | 67.2°F | -1.2° | USC00517166 | |
| 1967 | Mar | 68.4°F | 67.7°F | +0.7° | USC00517166 | |
| 1967 | Apr | 68.7°F | 68.8°F | -0.1° | USC00517166 | |
| 1967 | May | 70.8°F | 70.0°F | +0.8° | USC00517166 | |
| 1967 | Jun | 70.8°F | 70.9°F | -0.2° | USC00517166 | |
| 1967 | Jul | 73.2°F | 72.0°F | +1.2° | USC00517166 | |
| 1967 | Aug | 72.5°F | 72.6°F | -0.1° | USC00517166 | |
| 1967 | Sep | 71.8°F | 72.4°F | -0.6° | USC00517166 | |
| 1967 | Oct | 70.6°F | 71.9°F | -1.2° | USC00517166 | |
| 1967 | Nov | 68.2°F | 70.4°F | -2.2° | USC00517166 | |
| 1967 | Dec | 67.6°F | 68.4°F | -0.9° | USC00517166 | |
| 1968 | Jan | 66.1°F | 66.7°F | -0.6° | USC00517166 | |
| 1968 | Feb | 67.4°F | 67.2°F | +0.2° | USC00517166 | |
| 1968 | Mar | 68.5°F | 67.7°F | +0.8° | USC00517166 | |
| 1968 | Apr | 69.2°F | 68.8°F | +0.4° | USC00517166 | |
| 1968 | May | 71.1°F | 70.0°F | +1.1° | USC00517166 | |
| 1968 | Jun | 71.0°F | 70.9°F | +0.1° | USC00517166 | |
| 1968 | Jul | 72.5°F | 72.0°F | +0.5° | USC00517166 | |
| 1968 | Aug | 72.6°F | 72.6°F | +0.0° | USC00517166 | |
| 1968 | Sep | 72.8°F | 72.4°F | +0.4° | USC00517166 | |
| 1968 | Oct | 72.4°F | 71.9°F | +0.5° | USC00517166 | |
| 1968 | Nov | 70.3°F | 70.4°F | +0.0° | USC00517166 | |
| 1968 | Dec | 68.2°F | 68.4°F | -0.3° | USC00517166 | |
| 1969 | Jan | 65.5°F | 66.7°F | -1.2° | USC00517166 | |
| 1969 | Feb | 67.2°F | 67.2°F | +0.1° | USC00517166 | |
| 1969 | Mar | 67.1°F | 67.7°F | -0.6° | USC00517166 | |
| 1969 | Apr | 68.6°F | 68.8°F | -0.2° | USC00517166 | |
| 1969 | May | 69.5°F | 70.0°F | -0.5° | USC00517166 | |
| 1969 | Jun | 70.7°F | 70.9°F | -0.2° | USC00517166 | |
| 1969 | Jul | 71.2°F | 72.0°F | -0.8° | USC00517166 | |
| 1969 | Aug | 71.1°F | 72.6°F | -1.4° | USC00517166 | |
| 1969 | Sep | 70.5°F | 72.4°F | -1.8° | USC00517166 | |
| 1969 | Oct | 69.3°F | 71.9°F | -2.5° | USC00517166 | |
| 1969 | Nov | 68.2°F | 70.4°F | -2.2° | USC00517166 | |
| 1969 | Dec | 66.3°F | 68.4°F | -2.1° | USC00517166 | |
| 1970 | Jan | 66.4°F | 66.7°F | -0.2° | USC00517166 | |
| 1970 | Feb | 64.1°F | 67.2°F | -3.1° | USC00513977 | |
| 1970 | Mar | 66.1°F | 67.7°F | -1.6° | USC00517166 | |
| 1970 | Apr | 67.7°F | 68.8°F | -1.1° | USC00517166 | |
| 1970 | May | 70.1°F | 70.0°F | +0.1° | USC00517166 | |
| 1970 | Jun | 70.4°F | 70.9°F | -0.5° | USC00517166 | |
| 1970 | Jul | 70.2°F | 72.0°F | -1.8° | USC00517166 | |
| 1970 | Aug | 72.1°F | 72.6°F | -0.5° | USC00517166 | |
| 1970 | Sep | 69.8°F | 72.4°F | -2.6° | USC00517166 | |
| 1970 | Oct | 70.3°F | 71.9°F | -1.5° | USC00517166 | |
| 1970 | Nov | 68.6°F | 70.4°F | -1.7° | USC00517166 | |
| 1970 | Dec | 66.0°F | 68.4°F | -2.4° | USC00517166 | |
| 1971 | Jan | 65.7°F | 66.7°F | -1.0° | USC00517166 | |
| 1971 | Feb | 66.2°F | 67.2°F | -1.0° | USC00517166 | |
| 1971 | Mar | 66.5°F | 67.7°F | -1.2° | USC00517166 | |
| 1971 | Apr | 67.8°F | 68.8°F | -0.9° | USC00517166 | |
| 1971 | May | 67.7°F | 70.0°F | -2.3° | USC00517166 | |
| 1971 | Jun | 69.0°F | 70.9°F | -1.9° | USC00517166 | |
| 1971 | Jul | 70.8°F | 72.0°F | -1.2° | USC00517166 | |
| 1971 | Aug | 70.9°F | 72.6°F | -1.6° | USC00517166 | |
| 1971 | Sep | 69.2°F | 72.4°F | -3.2° | USC00517166 | |
| 1971 | Oct | 68.7°F | 71.9°F | -3.2° | USC00517166 | |
| 1971 | Nov | 63.8°F | 70.4°F | -6.6° | USC00513977 | |
| 1971 | Dec | 65.1°F | 68.4°F | -3.3° | USC00517166 | |
| 1972 | Jan | 64.4°F | 66.7°F | -2.2° | USC00517166 | |
| 1972 | Feb | 61.1°F | 67.2°F | -6.1° | USC00513977 | |
| 1972 | Mar | 67.4°F | 67.7°F | -0.3° | USC00517166 | |
| 1972 | Apr | 67.6°F | 68.8°F | -1.2° | USC00517166 | |
| 1972 | May | 68.1°F | 70.0°F | -1.9° | USC00517166 | |
| 1972 | Jun | 65.4°F | 70.9°F | -5.5° | USC00513977 | |
| 1972 | Jul | 71.3°F | 72.0°F | -0.7° | USC00517166 | |
| 1972 | Aug | 71.9°F | 72.6°F | -0.7° | USC00517166 | |
| 1972 | Sep | 71.5°F | 72.4°F | -0.9° | USC00517166 | |
| 1972 | Oct | 70.7°F | 71.9°F | -1.1° | USC00517166 | |
| 1972 | Nov | 63.2°F | 70.4°F | -7.2° | USC00513977 | |
| 1972 | Dec | 65.8°F | 68.4°F | -2.6° | USC00517166 | |
| 1973 | Jan | 65.8°F | 66.7°F | -0.9° | USC00517166 | |
| 1973 | Feb | 64.1°F | 67.2°F | -3.1° | USC00517166 | |
| 1973 | Mar | 66.7°F | 67.7°F | -1.0° | USC00517166 | |
| 1973 | Apr | 66.4°F | 68.8°F | -2.3° | USC00517166 | |
| 1973 | May | 67.3°F | 70.0°F | -2.7° | USC00517166 | |
| 1973 | Jun | 60.7°F | 70.9°F | -10.2° | USC00512751 | |
| 1973 | Jul | 71.1°F | 72.0°F | -0.9° | USC00517166 | |
| 1973 | Aug | 71.2°F | 72.6°F | -1.4° | USC00517166 | |
| 1973 | Sep | 70.1°F | 72.4°F | -2.2° | USC00517166 | |
| 1973 | Oct | 59.8°F | 71.9°F | -12.0° | USC00512751 | |
| 1973 | Nov | 57.2°F | 70.4°F | -13.1° | USC00512751 | |
| 1973 | Dec | 67.0°F | 68.4°F | -1.4° | USC00517166 | |
| 1974 | Jan | 67.6°F | 66.7°F | +1.0° | USC00517166 | |
| 1974 | Feb | 65.9°F | 67.2°F | -1.2° | USC00517166 | |
| 1974 | Mar | 67.5°F | 67.7°F | -0.2° | USC00517166 | |
| 1974 | Apr | 68.5°F | 68.8°F | -0.3° | USC00517166 | |
| 1974 | May | 61.0°F | 70.0°F | -9.0° | USC00512751 | |
| 1974 | Jun | 62.2°F | 70.9°F | -8.7° | USC00512751 | |
| 1974 | Jul | 62.7°F | 72.0°F | -9.3° | USC00512751 | |
| 1974 | Aug | 72.4°F | 72.6°F | -0.2° | USC00517166 | |
| 1974 | Sep | 72.0°F | 72.4°F | -0.4° | USC00517166 | |
| 1974 | Oct | 71.8°F | 71.9°F | +0.0° | USC00517166 | |
| 1974 | Nov | 69.4°F | 70.4°F | -1.0° | USC00517166 | |
| 1974 | Dec | 68.1°F | 68.4°F | -0.3° | USC00517166 | |
| 1975 | Jan | 66.3°F | 66.7°F | -0.4° | USC00517166 | |
| 1975 | Feb | 66.7°F | 67.2°F | -0.5° | USC00517166 | |
| 1975 | Mar | 66.6°F | 67.7°F | -1.2° | USC00517166 | |
| 1975 | Apr | 67.2°F | 68.8°F | -1.6° | USC00517166 | |
| 1975 | May | 67.5°F | 70.0°F | -2.5° | USC00517166 | |
| 1975 | Jun | 68.7°F | 70.9°F | -2.2° | USC00517166 | |
| 1975 | Jul | 69.3°F | 72.0°F | -2.7° | USC00517166 | |
| 1975 | Aug | 70.3°F | 72.6°F | -2.2° | USC00517166 | |
| 1975 | Sep | 70.5°F | 72.4°F | -1.9° | USC00517166 | |
| 1975 | Oct | 69.9°F | 71.9°F | -1.9° | USC00517166 | |
| 1975 | Nov | 68.9°F | 70.4°F | -1.5° | USC00517166 | |
| 1975 | Dec | 67.5°F | 68.4°F | -1.0° | USC00517166 | |
| 1976 | Jan | 65.9°F | 66.7°F | -0.7° | USC00517166 | |
| 1976 | Feb | 66.1°F | 67.2°F | -1.1° | USC00517166 | |
| 1976 | Mar | 66.1°F | 67.7°F | -1.6° | USC00517166 | |
| 1976 | Apr | 66.2°F | 68.8°F | -2.5° | USC00517166 | |
| 1976 | May | 67.0°F | 70.0°F | -3.0° | USC00517166 | |
| 1976 | Jun | 67.8°F | 70.9°F | -3.1° | USC00517166 | |
| 1976 | Jul | 69.0°F | 72.0°F | -3.0° | USC00517166 | |
| 1976 | Aug | 70.6°F | 72.6°F | -2.0° | USC00517166 | |
| 1976 | Sep | 71.6°F | 72.4°F | -0.8° | USC00517166 | |
| 1976 | Oct | 70.6°F | 71.9°F | -1.3° | USC00517166 | |
| 1976 | Nov | 68.2°F | 70.4°F | -2.2° | USC00517166 | |
| 1976 | Dec | 66.6°F | 68.4°F | -1.8° | USC00517166 | |
| 1977 | Jan | 66.6°F | 66.7°F | -0.1° | USC00517166 | |
| 1977 | Feb | 69.3°F | 67.2°F | +2.1° | USC00517166 | |
| 1977 | Mar | 69.5°F | 67.7°F | +1.8° | USC00517166 | |
| 1977 | Apr | 69.7°F | 68.8°F | +0.9° | USC00517166 | |
| 1977 | May | 70.2°F | 70.0°F | +0.2° | USC00517166 | |
| 1977 | Jun | 69.0°F | 70.9°F | -1.9° | USC00517166 | |
| 1977 | Jul | 71.4°F | 72.0°F | -0.6° | USC00517166 | |
| 1977 | Aug | 71.8°F | 72.6°F | -0.8° | USC00517166 | |
| 1977 | Sep | 71.6°F | 72.4°F | -0.7° | USC00517166 | |
| 1977 | Oct | 71.2°F | 71.9°F | -0.7° | USC00517166 | |
| 1977 | Nov | 70.3°F | 70.4°F | -0.1° | USC00517166 | |
| 1977 | Dec | 69.4°F | 68.4°F | +0.9° | USC00517166 | |
| 1978 | Jan | 67.0°F | 66.7°F | +0.3° | USC00517166 | |
| 1978 | Feb | 66.8°F | 67.2°F | -0.3° | USC00517166 | |
| 1978 | Mar | 66.9°F | 67.7°F | -0.8° | USC00517166 | |
| 1978 | Apr | 69.1°F | 68.8°F | +0.4° | USC00517166 | |
| 1978 | May | 71.1°F | 70.0°F | +1.1° | USC00517166 | |
| 1978 | Jun | 71.9°F | 70.9°F | +1.0° | USC00517166 | |
| 1978 | Jul | 72.5°F | 72.0°F | +0.5° | USC00517166 | |
| 1978 | Aug | 73.3°F | 72.6°F | +0.7° | USC00517166 | |
| 1978 | Sep | 72.1°F | 72.4°F | -0.3° | USC00517166 | |
| 1978 | Oct | 71.7°F | 71.9°F | -0.1° | USC00517166 | |
| 1978 | Nov | 70.1°F | 70.4°F | -0.3° | USC00517166 | |
| 1978 | Dec | 67.4°F | 68.4°F | -1.0° | USC00517166 | |
| 1979 | Jan | 65.9°F | 66.7°F | -0.8° | USC00517166 | |
| 1979 | Feb | 67.1°F | 67.2°F | -0.1° | USC00517166 | |
| 1979 | Mar | 67.1°F | 67.7°F | -0.6° | USC00517166 | |
| 1979 | Apr | 68.8°F | 68.8°F | +0.0° | USC00517166 | |
| 1979 | May | 69.1°F | 70.0°F | -0.9° | USC00517166 | |
| 1979 | Jun | 70.0°F | 70.9°F | -0.9° | USC00517166 | |
| 1979 | Jul | 70.5°F | 72.0°F | -1.5° | USC00517166 | |
| 1979 | Aug | 72.0°F | 72.6°F | -0.6° | USC00517166 | |
| 1979 | Sep | 72.2°F | 72.4°F | -0.2° | USC00517166 | |
| 1979 | Oct | 71.8°F | 71.9°F | -0.1° | USC00517166 | |
| 1979 | Nov | 69.5°F | 70.4°F | -0.8° | USC00517166 | |
| 1979 | Dec | 68.3°F | 68.4°F | -0.2° | USC00517166 | |
| 1980 | Jan | 67.3°F | 66.7°F | +0.6° | USC00517166 | |
| 1980 | Feb | 69.7°F | 67.2°F | +2.5° | USC00517166 | |
| 1980 | Mar | 68.9°F | 67.7°F | +1.2° | USC00517166 | |
| 1980 | Apr | 69.3°F | 68.8°F | +0.5° | USC00517166 | |
| 1980 | May | 70.2°F | 70.0°F | +0.2° | USC00517166 | |
| 1980 | Jun | 70.6°F | 70.9°F | -0.3° | USC00517166 | |
| 1980 | Jul | 71.3°F | 72.0°F | -0.7° | USC00517166 | |
| 1980 | Aug | 71.1°F | 72.6°F | -1.5° | USC00517166 | |
| 1980 | Sep | 71.7°F | 72.4°F | -0.7° | USC00517166 | |
| 1980 | Oct | 70.7°F | 71.9°F | -1.2° | USC00517166 | |
| 1980 | Nov | 70.6°F | 70.4°F | +0.2° | USC00517166 | |
| 1980 | Dec | 70.1°F | 68.4°F | +1.7° | USC00517166 | |
| 1981 | Jan | 68.4°F | 66.7°F | +1.8° | USC00517166 | |
| 1981 | Feb | 69.0°F | 67.2°F | +1.9° | USC00517166 | |
| 1981 | Mar | 67.8°F | 67.7°F | +0.1° | USC00517166 | |
| 1981 | Apr | 68.8°F | 68.8°F | +0.1° | USC00517166 | |
| 1981 | May | 70.1°F | 70.0°F | +0.1° | USC00517166 | |
| 1981 | Jun | 70.9°F | 70.9°F | -0.1° | USC00517166 | |
| 1981 | Jul | 71.2°F | 72.0°F | -0.8° | USC00517166 | |
| 1981 | Aug | 71.7°F | 72.6°F | -0.8° | USC00517166 | |
| 1981 | Sep | 71.2°F | 72.4°F | -1.2° | USC00517166 | |
| 1981 | Oct | 70.4°F | 71.9°F | -1.4° | USC00517166 | |
| 1981 | Nov | 68.8°F | 70.4°F | -1.5° | USC00517166 | |
| 1981 | Dec | 67.2°F | 68.4°F | -1.2° | USC00517166 | |
| 1982 | Jan | 67.3°F | 66.7°F | +0.7° | USC00517166 | |
| 1982 | Feb | 68.6°F | 67.2°F | +1.5° | USC00517166 | |
| 1982 | Mar | 67.9°F | 67.7°F | +0.2° | USC00517166 | |
| 1982 | Apr | 68.0°F | 68.8°F | -0.7° | USC00517166 | |
| 1982 | May | 69.1°F | 70.0°F | -0.9° | USC00517166 | |
| 1982 | Jun | 71.0°F | 70.9°F | +0.1° | USC00517166 | |
| 1982 | Jul | 72.1°F | 72.0°F | +0.1° | USC00517166 | |
| 1982 | Aug | 72.4°F | 72.6°F | -0.2° | USC00517166 | |
| 1982 | Sep | 71.0°F | 72.4°F | -1.4° | USC00517166 | |
| 1982 | Oct | 71.2°F | 71.9°F | -0.7° | USC00517166 | |
| 1982 | Nov | 70.4°F | 70.4°F | +0.0° | USC00517166 | |
| 1982 | Dec | 67.6°F | 68.4°F | -0.8° | USC00517166 | |
| 1983 | Jan | 66.7°F | 66.7°F | +0.1° | USC00517166 | |
| 1983 | Feb | 66.5°F | 67.2°F | -0.7° | USC00517166 | |
| 1983 | Mar | 67.1°F | 67.7°F | -0.6° | USC00517166 | |
| 1983 | Apr | 69.3°F | 68.8°F | +0.5° | USC00517166 | |
| 1983 | May | 70.1°F | 70.0°F | +0.1° | USC00517166 | |
| 1983 | Jun | 70.6°F | 70.9°F | -0.3° | USC00517166 | |
| 1983 | Jul | 71.5°F | 72.0°F | -0.5° | USC00517166 | |
| 1983 | Aug | 72.8°F | 72.6°F | +0.3° | USC00517166 | |
| 1983 | Sep | 72.4°F | 72.4°F | +0.0° | USC00517166 | |
| 1983 | Oct | 71.4°F | 71.9°F | -0.4° | USC00517166 | |
| 1983 | Nov | 71.0°F | 70.4°F | +0.6° | USC00517166 | |
| 1983 | Dec | 69.9°F | 68.4°F | +1.5° | USC00517166 | |
| 1984 | Jan | 68.8°F | 66.7°F | +2.2° | USC00517166 | |
| 1984 | Feb | 68.3°F | 67.2°F | +1.1° | USC00517166 | |
| 1984 | Mar | 69.9°F | 67.7°F | +2.1° | USC00517166 | |
| 1984 | Apr | 70.0°F | 68.8°F | +1.2° | USC00517166 | |
| 1984 | May | 70.7°F | 70.0°F | +0.7° | USC00517166 | |
| 1984 | Jun | 71.5°F | 70.9°F | +0.5° | USC00517166 | |
| 1984 | Jul | 71.9°F | 72.0°F | -0.1° | USC00517166 | |
| 1984 | Aug | 72.2°F | 72.6°F | -0.4° | USC00517166 | |
| 1984 | Sep | 72.6°F | 72.4°F | +0.2° | USC00517166 | |
| 1984 | Oct | 73.1°F | 71.9°F | +1.2° | USC00517166 | |
| 1984 | Nov | 71.5°F | 70.4°F | +1.1° | USC00517166 | |
| 1984 | Dec | 68.5°F | 68.4°F | +0.1° | USC00517166 | |
| 1985 | Jan | 61.8°F | 66.7°F | -4.9° | USC00518650 | |
| 1985 | Feb | 62.5°F | 67.2°F | -4.7° | USC00518650 | |
| 1985 | Mar | 61.0°F | 67.7°F | -6.7° | USC00518650 | |
| 1985 | Apr | 68.5°F | 68.8°F | -0.2° | USC00517166 | |
| 1985 | May | 69.3°F | 70.0°F | -0.7° | USC00517166 | |
| 1985 | Jun | 71.8°F | 70.9°F | +0.8° | USC00517166 | |
| 1985 | Jul | 72.8°F | 72.0°F | +0.8° | USC00517166 | |
| 1985 | Aug | 73.5°F | 72.6°F | +0.9° | USC00517166 | |
| 1985 | Sep | 73.5°F | 72.4°F | +1.1° | USC00517166 | |
| 1985 | Oct | 72.8°F | 71.9°F | +0.9° | USC00517166 | |
| 1985 | Nov | 70.4°F | 70.4°F | +0.0° | USC00517166 | |
| 1985 | Dec | 69.2°F | 68.4°F | +0.8° | USC00517166 | |
| 1986 | Jan | 64.4°F | 66.7°F | -2.3° | USC00518650 | |
| 1986 | Feb | 64.5°F | 67.2°F | -2.7° | USC00518650 | |
| 1986 | Mar | 71.0°F | 67.7°F | +3.3° | USC00517166 | |
| 1986 | Apr | 70.3°F | 68.8°F | +1.5° | USC00517166 | |
| 1986 | May | 71.6°F | 70.0°F | +1.6° | USC00517166 | |
| 1986 | Jun | 72.2°F | 70.9°F | +1.3° | USC00517166 | |
| 1986 | Jul | 73.9°F | 72.0°F | +1.9° | USC00517166 | |
| 1986 | Aug | 75.2°F | 72.6°F | +2.6° | USC00517166 | |
| 1986 | Sep | 74.9°F | 72.4°F | +2.5° | USC00517166 | |
| 1986 | Oct | 73.5°F | 71.9°F | +1.7° | USC00517166 | |
| 1986 | Nov | 72.6°F | 70.4°F | +2.2° | USC00517166 | |
| 1986 | Dec | 69.0°F | 68.4°F | +0.6° | USC00517166 | |
| 1987 | Jan | 61.8°F | 66.7°F | -4.9° | USC00518650 | |
| 1987 | Feb | 66.1°F | 67.2°F | -1.1° | USC00517166 | |
| 1987 | Mar | 68.0°F | 67.7°F | +0.3° | USC00517166 | |
| 1987 | Apr | 69.9°F | 68.8°F | +1.1° | USC00517166 | |
| 1987 | May | 69.9°F | 70.0°F | -0.1° | USC00517166 | |
| 1987 | Jun | 72.7°F | 70.9°F | +1.8° | USC00517166 | |
| 1987 | Jul | 73.4°F | 72.0°F | +1.4° | USC00517166 | |
| 1987 | Aug | 74.4°F | 72.6°F | +1.9° | USC00517166 | |
| 1987 | Sep | 75.2°F | 72.4°F | +2.8° | USC00517166 | |
| 1987 | Oct | 73.2°F | 71.9°F | +1.3° | USC00517166 | |
| 1987 | Nov | 71.3°F | 70.4°F | +1.0° | USC00517166 | |
| 1987 | Dec | 70.1°F | 68.4°F | +1.7° | USC00517166 | |
| 1988 | Jan | 68.3°F | 66.7°F | +1.7° | USC00517166 | |
| 1988 | Feb | 68.9°F | 67.2°F | +1.7° | USC00517166 | |
| 1988 | Mar | 69.4°F | 67.7°F | +1.7° | USC00517166 | |
| 1988 | Apr | 69.1°F | 68.8°F | +0.3° | USC00517166 | |
| 1988 | May | 71.3°F | 70.0°F | +1.3° | USC00517166 | |
| 1988 | Jun | 72.1°F | 70.9°F | +1.1° | USC00517166 | |
| 1988 | Jul | 73.1°F | 72.0°F | +1.1° | USC00517166 | |
| 1988 | Aug | 73.0°F | 72.6°F | +0.4° | USC00517166 | |
| 1988 | Sep | 73.9°F | 72.4°F | +1.5° | USC00517166 | |
| 1988 | Oct | 73.1°F | 71.9°F | +1.2° | USC00517166 | |
| 1988 | Nov | 71.9°F | 70.4°F | +1.6° | USC00517166 | |
| 1988 | Dec | 69.4°F | 68.4°F | +0.9° | USC00517166 | |
| 1989 | Jan | 67.7°F | 66.7°F | +1.1° | USC00517166 | |
| 1989 | Feb | 67.4°F | 67.2°F | +0.2° | USC00517166 | |
| 1989 | Mar | 68.8°F | 67.7°F | +1.1° | USC00517166 | |
| 1989 | Apr | 68.5°F | 68.8°F | -0.3° | USC00517166 | |
| 1989 | May | 70.6°F | 70.0°F | +0.6° | USC00517166 | |
| 1989 | Jun | 71.5°F | 70.9°F | +0.6° | USC00517166 | |
| 1989 | Jul | 72.6°F | 72.0°F | +0.6° | USC00517166 | |
| 1989 | Aug | 72.2°F | 72.6°F | -0.4° | USC00517166 | |
| 1989 | Sep | 71.9°F | 72.4°F | -0.5° | USC00517166 | |
| 1989 | Oct | 73.0°F | 71.9°F | +1.1° | USC00517166 | |
| 1989 | Nov | 70.8°F | 70.4°F | +0.4° | USC00517166 | |
| 1989 | Dec | 68.1°F | 68.4°F | -0.3° | USC00517166 | |
| 1990 | Jan | 68.5°F | 66.7°F | +1.9° | USC00517166 | |
| 1990 | Feb | 67.2°F | 67.2°F | +0.0° | USC00517166 | |
| 1990 | Mar | 67.6°F | 67.7°F | -0.1° | USC00517166 | |
| 1990 | Apr | 69.9°F | 68.8°F | +1.1° | USC00517166 | |
| 1990 | May | 70.1°F | 70.0°F | +0.2° | USC00517166 | |
| 1990 | Jun | 71.9°F | 70.9°F | +1.0° | USC00517166 | |
| 1990 | Jul | 72.7°F | 72.0°F | +0.7° | USC00517166 | |
| 1990 | Aug | 73.6°F | 72.6°F | +1.0° | USC00517166 | |
| 1990 | Sep | 73.7°F | 72.4°F | +1.3° | USC00517166 | |
| 1990 | Oct | 71.9°F | 71.9°F | +0.0° | USC00517166 | |
| 1990 | Nov | 71.9°F | 70.4°F | +1.5° | USC00517166 | |
| 1990 | Dec | 68.6°F | 68.4°F | +0.1° | USC00517166 | |
| 1991 | Jan | 67.0°F | 66.7°F | +0.3° | USC00517166 | |
| 1991 | Feb | 68.2°F | 67.2°F | +1.1° | USC00517166 | |
| 1991 | Mar | 67.9°F | 67.7°F | +0.1° | USC00517166 | |
| 1991 | Apr | 68.7°F | 68.8°F | -0.1° | USC00517166 | |
| 1991 | May | 69.6°F | 70.0°F | -0.4° | USC00517166 | |
| 1991 | Jun | 70.3°F | 70.9°F | -0.6° | USC00517166 | |
| 1991 | Jul | 72.0°F | 72.0°F | +0.0° | USC00517166 | |
| 1991 | Aug | 73.7°F | 72.6°F | +1.1° | USC00517166 | |
| 1991 | Sep | 73.6°F | 72.4°F | +1.2° | USC00517166 | |
| 1991 | Oct | 71.8°F | 71.9°F | +0.0° | USC00517166 | |
| 1991 | Nov | 71.5°F | 70.4°F | +1.1° | USC00517166 | |
| 1991 | Dec | 68.8°F | 68.4°F | +0.4° | USC00517166 | |
| 1992 | Jan | 66.7°F | 66.7°F | +0.0° | USC00517166 | |
| 1992 | Feb | 67.2°F | 67.2°F | +0.0° | USC00517166 | |
| 1992 | Mar | 67.5°F | 67.7°F | -0.2° | USC00517166 | |
| 1992 | Apr | 69.2°F | 68.8°F | +0.4° | USC00517166 | |
| 1992 | May | 71.3°F | 70.0°F | +1.3° | USC00517166 | |
| 1992 | Jun | 72.5°F | 70.9°F | +1.5° | USC00517166 | |
| 1992 | Jul | 72.3°F | 72.0°F | +0.3° | USC00517166 | |
| 1992 | Aug | 73.4°F | 72.6°F | +0.8° | USC00517166 | |
| 1992 | Sep | 73.7°F | 72.4°F | +1.3° | USC00517166 | |
| 1992 | Oct | 73.0°F | 71.9°F | +1.1° | USC00517166 | |
| 1992 | Nov | 71.2°F | 70.4°F | +0.8° | USC00517166 | |
| 1992 | Dec | 69.5°F | 68.4°F | +1.1° | USC00517166 | |
| 1993 | Jan | 66.4°F | 66.7°F | -0.2° | USC00517166 | |
| 1993 | Feb | 65.7°F | 67.2°F | -1.5° | USC00517166 | |
| 1993 | Mar | 67.4°F | 67.7°F | -0.3° | USC00517166 | |
| 1993 | Apr | 68.7°F | 68.8°F | -0.1° | USC00517166 | |
| 1993 | May | 69.3°F | 70.0°F | -0.7° | USC00517166 | |
| 1993 | Jun | 71.9°F | 70.9°F | +1.0° | USC00517166 | |
| 1993 | Jul | 72.2°F | 72.0°F | +0.2° | USC00517166 | |
| 1993 | Aug | 73.2°F | 72.6°F | +0.6° | USC00517166 | |
| 1993 | Sep | 73.0°F | 72.4°F | +0.7° | USC00517166 | |
| 1993 | Oct | 72.0°F | 71.9°F | +0.1° | USC00517166 | |
| 1993 | Nov | 68.9°F | 70.4°F | -1.5° | USC00517166 | |
| 1993 | Dec | 66.9°F | 68.4°F | -1.6° | USC00517166 | |
| 1994 | Jan | 66.2°F | 66.7°F | -0.5° | USC00517166 | |
| 1994 | Feb | 67.2°F | 67.2°F | +0.1° | USC00517166 | |
| 1994 | Mar | 67.3°F | 67.7°F | -0.4° | USC00517166 | |
| 1994 | Apr | 68.3°F | 68.8°F | -0.5° | USC00517166 | |
| 1994 | May | 69.8°F | 70.0°F | -0.2° | USC00517166 | |
| 1994 | Jun | 70.6°F | 70.9°F | -0.3° | USC00517166 | |
| 1994 | Jul | 72.8°F | 72.0°F | +0.8° | USC00517166 | |
| 1994 | Aug | 72.8°F | 72.6°F | +0.2° | USC00517166 | |
| 1994 | Sep | 72.9°F | 72.4°F | +0.5° | USC00517166 | |
| 1994 | Oct | 72.2°F | 71.9°F | +0.4° | USC00517166 | |
| 1994 | Nov | 69.9°F | 70.4°F | -0.4° | USC00517166 | |
| 1994 | Dec | 68.3°F | 68.4°F | -0.1° | USC00517166 | |
| 1995 | Jan | 67.2°F | 66.7°F | +0.5° | USC00517166 | |
| 1995 | Feb | 67.7°F | 67.2°F | +0.6° | USC00517166 | |
| 1995 | Mar | 69.5°F | 67.7°F | +1.8° | USC00517166 | |
| 1995 | Apr | 69.8°F | 68.8°F | +1.0° | USC00517166 | |
| 1995 | May | 71.0°F | 70.0°F | +1.1° | USC00517166 | |
| 1995 | Jun | 71.9°F | 70.9°F | +1.0° | USC00517166 | |
| 1995 | Jul | 73.9°F | 72.0°F | +1.9° | USC00517166 | |
| 1995 | Aug | 72.8°F | 72.6°F | +0.2° | USC00517166 | |
| 1995 | Sep | 72.9°F | 72.4°F | +0.5° | USC00517166 | |
| 1995 | Oct | 73.3°F | 71.9°F | +1.4° | USC00517166 | |
| 1995 | Nov | 72.1°F | 70.4°F | +1.7° | USC00517166 | |
| 1995 | Dec | 70.9°F | 68.4°F | +2.4° | USC00517166 | |
| 1996 | Jan | 69.8°F | 66.7°F | +3.2° | USC00517166 | |
| 1996 | Feb | 68.0°F | 67.2°F | +0.8° | USC00517166 | |
| 1996 | Mar | 68.1°F | 67.7°F | +0.4° | USC00517166 | |
| 1996 | Apr | 71.0°F | 68.8°F | +2.2° | USC00517166 | |
| 1996 | May | 73.0°F | 70.0°F | +3.0° | USC00517166 | |
| 1996 | Jun | 72.8°F | 70.9°F | +1.9° | USC00517166 | |
| 1996 | Jul | 72.8°F | 72.0°F | +0.8° | USC00517166 | |
| 1996 | Aug | 73.5°F | 72.6°F | +1.0° | USC00517166 | |
| 1996 | Sep | 72.7°F | 72.4°F | +0.3° | USC00517166 | |
| 1996 | Oct | 72.9°F | 71.9°F | +1.1° | USC00517166 | |
| 1996 | Nov | 71.9°F | 70.4°F | +1.5° | USC00517166 | |
| 1996 | Dec | 68.8°F | 68.4°F | +0.4° | USC00517166 | |
| 1997 | Jan | 68.5°F | 66.7°F | +1.8° | USC00517166 | |
| 1997 | Feb | 68.4°F | 67.2°F | +1.2° | USC00517166 | |
| 1997 | Mar | 68.8°F | 67.7°F | +1.1° | USC00517166 | |
| 1997 | Apr | 68.9°F | 68.8°F | +0.1° | USC00517166 | |
| 1997 | May | 71.5°F | 70.0°F | +1.5° | USC00517166 | |
| 1997 | Jun | 71.8°F | 70.9°F | +0.8° | USC00517166 | |
| 1997 | Jul | 72.7°F | 72.0°F | +0.7° | USC00517166 | |
| 1997 | Aug | 72.5°F | 72.6°F | -0.1° | USC00517166 | |
| 1997 | Sep | 72.2°F | 72.4°F | -0.2° | USC00517166 | |
| 1997 | Oct | 71.2°F | 71.9°F | -0.7° | USC00517166 | |
| 1997 | Nov | 69.9°F | 70.4°F | -0.5° | USC00517166 | |
| 1997 | Dec | 66.7°F | 68.4°F | -1.7° | USC00517166 | |
| 1998 | Jan | 66.3°F | 66.7°F | -0.4° | USC00517166 | |
| 1998 | Feb | 66.7°F | 67.2°F | -0.5° | USC00517166 | |
| 1998 | Mar | 67.2°F | 67.7°F | -0.5° | USC00517166 | |
| 1998 | Apr | 67.6°F | 68.8°F | -1.2° | USC00517166 | |
| 1998 | May | 68.0°F | 70.0°F | -2.0° | USC00517166 | |
| 1998 | Jun | 69.2°F | 70.9°F | -1.7° | USC00517166 | |
| 1998 | Jul | 70.6°F | 72.0°F | -1.4° | USC00517166 | |
| 1998 | Aug | 71.7°F | 72.6°F | -0.9° | USC00517166 | |
| 1998 | Sep | 70.5°F | 72.4°F | -1.9° | USC00517166 | |
| 1998 | Oct | 71.6°F | 71.9°F | -0.3° | USC00518652 | |
| 1998 | Nov | 68.7°F | 70.4°F | -1.7° | USC00517166 | |
| 1998 | Dec | 67.0°F | 68.4°F | -1.5° | USC00517166 | |
| 1999 | Jan | 66.0°F | 66.7°F | -0.7° | USC00517166 | |
| 1999 | Feb | 65.7°F | 67.2°F | -1.4° | USC00517166 | |
| 1999 | Mar | 66.1°F | 67.7°F | -1.6° | USC00517166 | |
| 1999 | Apr | 66.3°F | 68.8°F | -2.4° | USC00517166 | |
| 1999 | May | 68.8°F | 70.0°F | -1.2° | USC00517166 | |
| 1999 | Jun | 68.9°F | 70.9°F | -2.0° | USC00517166 | |
| 1999 | Jul | 70.5°F | 72.0°F | -1.5° | USC00517166 | |
| 1999 | Aug | 71.0°F | 72.6°F | -1.5° | USC00517166 | |
| 1999 | Sep | 70.1°F | 72.4°F | -2.3° | USC00517166 | |
| 1999 | Oct | 69.4°F | 71.9°F | -2.5° | USC00517166 | |
| 1999 | Nov | 68.6°F | 70.4°F | -1.8° | USC00517166 | |
| 1999 | Dec | 67.4°F | 68.4°F | -1.0° | USC00517166 | |
| 2000 | Jan | 66.3°F | 66.7°F | -0.3° | USC00517166 | |
| 2000 | Feb | 67.1°F | 67.2°F | -0.1° | USC00517166 | |
| 2000 | Mar | 67.3°F | 67.7°F | -0.4° | USC00517166 | |
| 2000 | Apr | 67.1°F | 68.8°F | -1.7° | USC00517166 | |
| 2000 | May | 69.5°F | 70.0°F | -0.5° | USC00517166 | |
| 2000 | Jun | 69.9°F | 70.9°F | -1.0° | USC00517166 | |
| 2000 | Jul | 72.7°F | 72.0°F | +0.7° | USC00517166 | |
| 2000 | Aug | 72.4°F | 72.6°F | -0.2° | USC00517166 | |
| 2000 | Sep | 70.6°F | 72.4°F | -1.8° | USC00517166 | |
| 2000 | Oct | 71.5°F | 71.9°F | -0.4° | USC00517166 | |
| 2000 | Nov | 69.0°F | 70.4°F | -1.3° | USC00517166 | |
| 2000 | Dec | 67.9°F | 68.4°F | -0.5° | USC00517166 | |
| 2001 | Jan | 67.3°F | 66.7°F | +0.6° | USC00517166 | |
| 2001 | Feb | 67.0°F | 67.2°F | -0.2° | USC00517166 | |
| 2001 | Mar | 65.8°F | 67.7°F | -1.9° | USC00517166 | |
| 2001 | Apr | 67.7°F | 68.8°F | -1.1° | USC00517166 | |
| 2001 | May | 68.2°F | 70.0°F | -1.8° | USC00517166 | |
| 2001 | Jun | 70.3°F | 70.9°F | -0.7° | USC00517166 | |
| 2001 | Jul | 70.6°F | 72.0°F | -1.4° | USC00517166 | |
| 2001 | Aug | 72.4°F | 72.6°F | -0.2° | USC00517166 | |
| 2001 | Sep | 72.3°F | 72.4°F | +0.0° | USC00517166 | |
| 2001 | Oct | 71.1°F | 71.9°F | -0.8° | USC00517166 | |
| 2001 | Nov | 70.3°F | 70.4°F | -0.1° | USC00517166 | |
| 2001 | Dec | 68.5°F | 68.4°F | +0.1° | USC00517166 | |
| 2002 | Jan | 67.7°F | 66.7°F | +1.0° | USC00517166 | |
| 2002 | Feb | 66.6°F | 67.2°F | -0.6° | USC00517166 | |
| 2002 | Mar | 67.4°F | 67.7°F | -0.3° | USC00517166 | |
| 2002 | Apr | 69.6°F | 68.8°F | +0.9° | USC00517166 | |
| 2002 | May | 70.4°F | 70.0°F | +0.4° | USC00517166 | |
| 2002 | Jun | 70.3°F | 70.9°F | -0.6° | USC00517166 | |
| 2002 | Jul | 72.0°F | 72.0°F | +0.0° | USC00517166 | |
| 2002 | Aug | 72.2°F | 72.6°F | -0.3° | USC00517166 | |
| 2002 | Sep | 70.8°F | 72.4°F | -1.5° | USC00517166 | |
| 2002 | Oct | 71.0°F | 71.9°F | -0.9° | USC00517166 | |
| 2002 | Nov | 69.4°F | 70.4°F | -1.0° | USC00517166 | |
| 2002 | Dec | 67.6°F | 68.4°F | -0.8° | USC00517166 | |
| 2003 | Jan | 67.2°F | 66.7°F | +0.5° | USC00517166 | |
| 2003 | Feb | 66.3°F | 67.2°F | -0.9° | USC00517166 | |
| 2003 | Mar | 68.2°F | 67.7°F | +0.5° | USC00517166 | |
| 2003 | Apr | 68.6°F | 68.8°F | -0.1° | USC00517166 | |
| 2003 | May | 70.7°F | 70.0°F | +0.7° | USC00517166 | |
| 2003 | Jun | 71.0°F | 70.9°F | +0.1° | USC00517166 | |
| 2003 | Jul | 72.5°F | 72.0°F | +0.5° | USC00517166 | |
| 2003 | Aug | 73.2°F | 72.6°F | +0.6° | USC00517166 | |
| 2003 | Sep | 72.4°F | 72.4°F | +0.0° | USC00517166 | |
| 2003 | Oct | 72.6°F | 71.9°F | +0.7° | USC00517166 | |
| 2003 | Nov | 70.0°F | 70.4°F | -0.4° | USC00517166 | |
| 2003 | Dec | 68.6°F | 68.4°F | +0.2° | USC00517166 | |
| 2004 | Jan | 67.6°F | 66.7°F | +1.0° | USC00517166 | |
| 2004 | Feb | 68.7°F | 67.2°F | +1.6° | USC00517166 | |
| 2004 | Mar | 69.1°F | 67.7°F | +1.4° | USC00517166 | |
| 2004 | Apr | 68.7°F | 68.8°F | -0.1° | USC00517166 | |
| 2004 | May | 70.5°F | 70.0°F | +0.5° | USC00517166 | |
| 2004 | Jun | 71.0°F | 70.9°F | +0.1° | USC00517166 | |
| 2004 | Jul | 70.3°F | 72.0°F | -1.7° | USC00517166 | |
| 2004 | Aug | 72.4°F | 72.6°F | -0.2° | USC00517166 | |
| 2004 | Sep | 71.4°F | 72.4°F | -1.0° | USC00517166 | |
| 2004 | Oct | 70.8°F | 71.9°F | -1.1° | USC00517166 | |
| 2004 | Nov | 69.7°F | 70.4°F | -0.7° | USC00517166 | |
| 2004 | Dec | 67.3°F | 68.4°F | -1.1° | USC00517166 | |
| 2005 | Jan | 67.2°F | 66.7°F | +0.6° | USC00517166 | |
| 2005 | Feb | 66.5°F | 67.2°F | -0.7° | USC00517166 | |
| 2005 | Mar | 67.3°F | 67.7°F | -0.4° | USC00517166 | |
| 2005 | Apr | 68.3°F | 68.8°F | -0.5° | USC00517166 | |
| 2005 | May | 68.9°F | 70.0°F | -1.1° | USC00517166 | |
| 2005 | Jun | 69.8°F | 70.9°F | -1.2° | USC00517166 | |
| 2005 | Jul | 70.6°F | 72.0°F | -1.3° | USC00517166 | |
| 2005 | Aug | 71.8°F | 72.6°F | -0.8° | USC00517166 | |
| 2005 | Sep | 71.8°F | 72.4°F | -0.6° | USC00517166 | |
| 2005 | Oct | 70.0°F | 71.9°F | -1.8° | USC00517166 | |
| 2005 | Nov | 69.5°F | 70.4°F | -0.9° | USC00517166 | |
| 2005 | Dec | 67.1°F | 68.4°F | -1.3° | USC00517166 | |
| 2006 | Jan | 67.1°F | 66.7°F | +0.4° | USC00517166 | |
| 2006 | Feb | 65.2°F | 67.2°F | -2.0° | USC00517166 | |
| 2006 | Mar | 67.6°F | 67.7°F | -0.2° | USC00517166 | |
| 2006 | Apr | 67.1°F | 68.8°F | -1.7° | USC00517166 | |
| 2006 | May | 67.2°F | 70.0°F | -2.8° | USC00517166 | |
| 2006 | Jun | 64.6°F | 70.9°F | -6.3° | USC00518652 | |
| 2006 | Jul | 70.3°F | 72.0°F | -1.7° | USC00517166 | |
| 2006 | Aug | 70.8°F | 72.6°F | -1.7° | USC00517166 | |
| 2006 | Sep | 70.4°F | 72.4°F | -2.0° | USC00517166 | |
| 2006 | Oct | 71.1°F | 71.9°F | -0.8° | USC00517166 | |
| 2006 | Nov | 69.9°F | 70.4°F | -0.5° | USC00517166 | |
| 2006 | Dec | 67.7°F | 68.4°F | -0.7° | USC00517166 | |
| 2007 | Jan | 66.9°F | 66.7°F | +0.3° | USC00517166 | |
| 2007 | Feb | 65.1°F | 67.2°F | -2.1° | USC00517166 | |
| 2007 | Mar | 61.1°F | 67.7°F | -6.6° | USC00518652 | |
| 2007 | Apr | 66.3°F | 68.8°F | -2.5° | USC00517166 | |
| 2007 | May | 68.1°F | 70.0°F | -1.8° | USC00517166 | |
| 2007 | Jun | 64.2°F | 70.9°F | -6.8° | USC00518652 | |
| 2007 | Jul | 70.4°F | 72.0°F | -1.6° | USC00517166 | |
| 2007 | Aug | 69.7°F | 72.6°F | -2.9° | USC00517166 | |
| 2007 | Sep | 69.3°F | 72.4°F | -3.1° | USC00517166 | |
| 2007 | Oct | 68.4°F | 71.9°F | -3.5° | USC00517166 | |
| 2007 | Nov | 68.3°F | 70.4°F | -2.1° | USC00517166 | |
| 2007 | Dec | 67.1°F | 68.4°F | -1.3° | USC00517166 | |
| 2008 | Jan | 64.5°F | 66.7°F | -2.1° | USC00517166 | |
| 2008 | Feb | 64.6°F | 67.2°F | -2.5° | USC00517166 | |
| 2008 | Mar | 60.0°F | 67.7°F | -7.7° | USC00518652 | |
| 2008 | Apr | 60.0°F | 68.8°F | -8.7° | USC00518652 | |
| 2008 | May | 67.2°F | 70.0°F | -2.8° | USC00517166 | |
| 2008 | Jun | 68.6°F | 70.9°F | -2.3° | USC00517166 | |
| 2008 | Jul | 69.7°F | 72.0°F | -2.3° | USC00517166 | |
| 2008 | Aug | 69.7°F | 72.6°F | -2.9° | USC00517166 | |
| 2008 | Sep | 68.4°F | 72.4°F | -4.0° | USC00517166 | |
| 2008 | Oct | 68.7°F | 71.9°F | -3.2° | USC00517166 | |
| 2008 | Nov | 67.8°F | 70.4°F | -2.5° | USC00517166 | |
| 2008 | Dec | 66.4°F | 68.4°F | -2.1° | USC00517166 | |
| 2009 | Jan | 64.6°F | 66.7°F | -2.1° | USC00517166 | |
| 2009 | Feb | 64.4°F | 67.2°F | -2.7° | USC00517166 | |
| 2009 | Mar | 64.3°F | 67.7°F | -3.5° | USC00517166 | |
| 2009 | Apr | 65.6°F | 68.8°F | -3.2° | USC00517166 | |
| 2009 | May | 69.4°F | 70.0°F | -0.6° | USC00517166 | |
| 2009 | Jun | 70.1°F | 70.9°F | -0.8° | USC00517166 | |
| 2009 | Jul | 71.0°F | 72.0°F | -1.0° | USC00517166 | |
| 2009 | Aug | 72.9°F | 72.6°F | +0.3° | USC00517166 | |
| 2009 | Sep | 70.9°F | 72.4°F | -1.5° | USC00517166 | |
| 2009 | Oct | 71.4°F | 71.9°F | -0.4° | USC00517166 | |
| 2009 | Nov | 69.3°F | 70.4°F | -1.1° | USC00517166 | |
| 2009 | Dec | 67.2°F | 68.4°F | -1.2° | USC00517166 | |
| 2010 | Jan | 67.6°F | 66.7°F | +1.0° | USC00517166 | |
| 2010 | Feb | 66.5°F | 67.2°F | -0.7° | USC00517166 | |
| 2010 | Mar | 66.1°F | 67.7°F | -1.6° | USC00517166 | |
| 2010 | Apr | 66.8°F | 68.8°F | -1.9° | USC00517166 | |
| 2010 | May | 68.3°F | 70.0°F | -1.7° | USC00517166 | |
| 2010 | Jun | 69.5°F | 70.9°F | -1.4° | USC00517166 | |
| 2010 | Jul | 69.0°F | 72.0°F | -3.0° | USC00517166 | |
| 2010 | Aug | 70.2°F | 72.6°F | -2.4° | USC00517166 | |
| 2010 | Sep | 69.5°F | 72.4°F | -2.9° | USC00517166 | |
| 2010 | Oct | 69.5°F | 71.9°F | -2.3° | USC00517166 | |
| 2010 | Nov | 68.0°F | 70.4°F | -2.4° | USC00517166 | |
| 2010 | Dec | 67.0°F | 68.4°F | -1.4° | USC00517166 | |
| 2011 | Jan | 65.9°F | 66.7°F | -0.7° | USC00517166 | |
| 2011 | Feb | 59.7°F | 67.2°F | -7.4° | USC00518652 | |
| 2011 | Mar | 67.2°F | 67.7°F | -0.5° | USC00517166 | |
| 2011 | Apr | 67.5°F | 68.8°F | -1.3° | USC00517166 | |
| 2011 | May | 68.1°F | 70.0°F | -1.9° | USC00517166 | |
| 2011 | Jun | 69.1°F | 70.9°F | -1.9° | USC00517166 | |
| 2011 | Jul | 68.9°F | 72.0°F | -3.1° | USC00517166 | |
| 2011 | Aug | 70.0°F | 72.6°F | -2.6° | USC00517166 | |
| 2011 | Sep | 69.4°F | 72.4°F | -3.0° | USC00517166 | |
| 2011 | Oct | 68.5°F | 71.9°F | -3.4° | USC00517166 | |
| 2011 | Nov | 67.3°F | 70.4°F | -3.1° | USC00517166 | |
| 2011 | Dec | 65.3°F | 68.4°F | -3.1° | USC00517166 | |
| 2012 | Jan | 66.0°F | 66.7°F | -0.6° | USC00517166 | |
| 2012 | Feb | 64.5°F | 67.2°F | -2.7° | USC00517166 | |
| 2012 | Mar | 65.5°F | 67.7°F | -2.2° | USC00517166 | |
| 2012 | Apr | 65.8°F | 68.8°F | -3.0° | USC00517166 | |
| 2012 | May | 67.3°F | 70.0°F | -2.7° | USC00517166 | |
| 2012 | Jun | 68.1°F | 70.9°F | -2.9° | USC00517166 | |
| 2012 | Jul | 68.1°F | 72.0°F | -3.9° | USC00517166 | |
| 2012 | Aug | 69.6°F | 72.6°F | -3.0° | USC00517166 | |
| 2012 | Sep | 68.0°F | 72.4°F | -4.4° | USC00517166 | |
| 2012 | Oct | 69.4°F | 71.9°F | -2.4° | USC00517166 | |
| 2012 | Nov | 67.6°F | 70.4°F | -2.8° | USC00517166 | |
| 2012 | Dec | 66.8°F | 68.4°F | -1.7° | USC00517166 | |
| 2013 | Jan | 65.6°F | 66.7°F | -1.0° | USC00517166 | |
| 2013 | Feb | 65.1°F | 67.2°F | -2.1° | USC00517166 | |
| 2013 | Mar | 65.6°F | 67.7°F | -2.1° | USC00517166 | |
| 2013 | Apr | 67.6°F | 68.8°F | -1.2° | USC00517166 | |
| 2013 | May | 68.8°F | 70.0°F | -1.2° | USC00517166 | |
| 2013 | Jun | 69.1°F | 70.9°F | -1.8° | USC00517166 | |
| 2013 | Jul | 70.5°F | 72.0°F | -1.5° | USC00517166 | |
| 2013 | Aug | 71.4°F | 72.6°F | -1.2° | USC00517166 | |
| 2013 | Sep | 69.9°F | 72.4°F | -2.5° | USC00517166 | |
| 2013 | Oct | 45.8°F | 71.9°F | -26.0° | USW00021514 | |
| 2013 | Nov | 45.9°F | 70.4°F | -24.5° | USW00021514 | |
| 2013 | Dec | 42.2°F | 68.4°F | -26.2° | USW00021514 | |
| 2014 | Jan | 56.8°F | 66.7°F | -9.9° | USW00021514 | |
| 2014 | Feb | 58.4°F | 67.2°F | -8.8° | USW00021514 | |
| 2014 | Mar | 66.1°F | 67.7°F | -1.6° | USC00517166 | |
| 2014 | Apr | 67.5°F | 68.8°F | -1.3° | USC00517166 | |
| 2014 | May | 68.4°F | 70.0°F | -1.6° | USC00517166 | |
| 2014 | Jun | 68.1°F | 70.9°F | -2.8° | USC00517166 | |
| 2014 | Jul | 70.2°F | 72.0°F | -1.8° | USC00517166 | |
| 2014 | Aug | 70.2°F | 72.6°F | -2.4° | USC00517166 | |
| 2014 | Sep | 70.3°F | 72.4°F | -2.1° | USC00517166 | |
| 2014 | Oct | 70.4°F | 71.9°F | -1.4° | USC00517166 | |
| 2014 | Nov | 68.6°F | 70.4°F | -1.8° | USC00517166 | |
| 2014 | Dec | 66.2°F | 68.4°F | -2.3° | USC00517166 | |
| 2015 | Jan | 66.2°F | 66.7°F | -0.5° | USC00517166 | |
| 2015 | Feb | 67.9°F | 67.2°F | +0.7° | USC00517166 | |
| 2015 | Mar | 66.3°F | 67.7°F | -1.4° | USC00517166 | |
| 2015 | Apr | 68.4°F | 68.8°F | -0.3° | USC00517166 | |
| 2015 | May | 67.9°F | 70.0°F | -2.0° | USC00517166 | |
| 2015 | Jun | 70.3°F | 70.9°F | -0.6° | USC00517166 | |
| 2015 | Jul | 72.3°F | 72.0°F | +0.3° | USC00517166 | |
| 2015 | Aug | 73.9°F | 72.6°F | +1.3° | USC00517166 | |
| 2015 | Sep | 73.7°F | 72.4°F | +1.3° | USC00517166 | |
| 2015 | Oct | 72.3°F | 71.9°F | +0.4° | USC00517166 | |
| 2015 | Nov | 70.7°F | 70.4°F | +0.3° | USC00517166 | |
| 2015 | Dec | 68.5°F | 68.4°F | +0.1° | USC00517166 | |
| 2016 | Jan | 66.6°F | 66.7°F | -0.1° | USC00517166 | |
| 2016 | Feb | 66.9°F | 67.2°F | -0.3° | USC00517166 | |
| 2016 | Mar | 67.7°F | 67.7°F | +0.0° | USC00517166 | |
| 2016 | Apr | 68.3°F | 68.8°F | -0.5° | USC00517166 | |
| 2016 | May | 69.4°F | 70.0°F | -0.5° | USC00517166 | |
| 2016 | Jun | 70.5°F | 70.9°F | -0.4° | USC00517166 | |
| 2016 | Jul | 72.2°F | 72.0°F | +0.2° | USC00517166 | |
| 2016 | Aug | 73.3°F | 72.6°F | +0.7° | USC00517166 | |
| 2016 | Sep | 72.7°F | 72.4°F | +0.3° | USC00517166 | |
| 2016 | Oct | 71.2°F | 71.9°F | -0.6° | USC00517166 | |
| 2016 | Nov | 68.8°F | 70.4°F | -1.6° | USC00517166 | |
| 2016 | Dec | 67.2°F | 68.4°F | -1.2° | USC00517166 | |
| 2017 | Jan | 66.6°F | 66.7°F | +0.0° | USC00517166 | |
| 2017 | Feb | 68.0°F | 67.2°F | +0.8° | USC00517166 | |
| 2017 | Mar | 70.0°F | 67.7°F | +2.2° | USC00517166 | |
| 2017 | Apr | 69.5°F | 68.8°F | +0.8° | USC00517166 | |
| 2017 | May | 70.0°F | 70.0°F | +0.0° | USC00517166 | |
| 2017 | Jun | 71.7°F | 70.9°F | +0.8° | USC00517166 | |
| 2017 | Jul | 72.6°F | 72.0°F | +0.6° | USC00517166 | |
| 2017 | Aug | 74.1°F | 72.6°F | +1.6° | USC00517166 | |
| 2017 | Sep | 72.4°F | 72.4°F | +0.0° | USC00517166 | |
| 2017 | Oct | 72.1°F | 71.9°F | +0.3° | USC00517166 | |
| 2017 | Nov | 70.1°F | 70.4°F | -0.3° | USC00517166 | |
| 2017 | Dec | 67.2°F | 68.4°F | -1.2° | USC00517166 | |
| 2018 | Jan | 67.6°F | 66.7°F | +0.9° | USC00517166 | |
| 2018 | Feb | 69.2°F | 67.2°F | +2.0° | USC00517166 | |
| 2018 | Mar | 68.3°F | 67.7°F | +0.6° | USC00517166 | |
| 2018 | Apr | 71.1°F | 68.8°F | +2.3° | USC00517166 | |
| 2018 | May | 71.0°F | 70.0°F | +1.0° | USC00517166 | |
| 2018 | Jun | 71.1°F | 70.9°F | +0.2° | USC00517166 | |
| 2018 | Jul | 72.8°F | 72.0°F | +0.8° | USC00517166 | |
| 2018 | Aug | 74.3°F | 72.6°F | +1.7° | USC00517166 | |
| 2018 | Sep | 74.0°F | 72.4°F | +1.7° | USC00517166 | |
| 2018 | Oct | 73.2°F | 71.9°F | +1.4° | USC00517166 | |
| 2018 | Nov | 72.1°F | 70.4°F | +1.7° | USC00517166 | |
| 2018 | Dec | 69.1°F | 68.4°F | +0.6° | USC00517166 | |
| 2019 | Jan | 67.5°F | 66.7°F | +0.9° | USC00517166 | |
| 2019 | Feb | 66.2°F | 67.2°F | -1.0° | USC00517166 | |
| 2019 | Mar | 68.2°F | 67.7°F | +0.5° | USC00517166 | |
| 2019 | Apr | 70.7°F | 68.8°F | +1.9° | USC00517166 | |
| 2019 | May | 71.9°F | 70.0°F | +1.9° | USC00517166 | |
| 2019 | Jun | 48.6°F | 70.9°F | -22.3° | USW00021514 | |
| 2019 | Jul | 49.4°F | 72.0°F | -22.6° | USW00021514 | |
| 2019 | Aug | 50.1°F | 72.6°F | -22.5° | USW00021514 | |
| 2019 | Sep | 48.5°F | 72.4°F | -23.8° | USW00021514 | |
| 2019 | Oct | 48.7°F | 71.9°F | -23.2° | USW00021514 | |
| 2019 | Nov | 45.5°F | 70.4°F | -24.9° | USW00021514 | |
| 2019 | Dec | 45.7°F | 68.4°F | -22.8° | USW00021514 |
Showing 768 of 768 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 query NOAA's Global Summary of the Month (GSOM) database for the closest weather station with good 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).
52
Initial gaps
52
Filled
0
Unfillable
Fill stations: KEALAKEKUA 26.2, HI US, MAUNA LOA 5 NNE, HI US, SOUTH KONA 2.31, HI US, NAPOOPOO 28, HI US, KAINALIU 73.2, HI US, SOUTH KONA 2 2.32, HI US
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: 1975 – 2000 (100% coverage)
| Month | Baseline | Years |
|---|---|---|
| January | 66.7°F | 26/26 |
| February | 67.2°F | 26/26 |
| March | 67.7°F | 26/26 |
| April | 68.8°F | 26/26 |
| May | 70.0°F | 26/26 |
| June | 70.9°F | 26/26 |
| July | 72.0°F | 26/26 |
| August | 72.6°F | 26/26 |
| September | 72.4°F | 26/26 |
| October | 71.9°F | 26/26 |
| November | 70.4°F | 26/26 |
| December | 68.4°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
Time of Observation Bias (TOBS)
Early cooperative weather stations typically read their min/max thermometers in the afternoon. This meant a single hot afternoon's peak temperature could be counted in two consecutive daily readings, inflating monthly maximums.
Between the 1950s and 1980s, most stations switched to morning or midnight observation times. This eliminated the warm bias but introduced a slight cool bias during the transition.
As a result, early decades in our data may read slightly warmer than they actually were, and the transition period may show an artificial cooling dip. Neither reflects actual temperature change. We use raw GSOM data without TOBS adjustments (NOAA's adjusted products like nClimDiv correct for this, but our station-level data does not).
Frequently Asked Questions
Is Captain Cook, Hawaii getting warmer?
Based on 64+ years of NOAA temperature records, Captain Cook has changed at a rate of approximately 0.15°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 Captain Cook?
The warmest year on record in Captain Cook was 1996, based on average annual temperature anomaly from NOAA station data.
Where does the temperature data for Captain Cook come from?
Data comes from the OPIHIHALE NUMBER 2 24.1, HI US weather station, part of NOAA's Global Historical Climatology Network. This station has recorded 64+ years of temperature observations used to build Captain Cook's climate profile.
How are the climate visualizations for Captain Cook created?
Three visualizations are generated from Captain Cook'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 Captain Cook's temperature data?
Yes. The interactive data table on this page shows every monthly temperature reading in Captain Cook's record. You can filter by decade and download the complete dataset as a CSV file for your own analysis.
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