Climate Change in Port Sulphur, Louisiana

96+ years of recorded temperature data show Port Sulphur is changing.

Based on our analysis of 96 years of temperature data near Port Sulphur, LA, this area shows relatively stable temperatures of approximately +0.2°F per decade. 10 of the last 10 years recorded above-average temperatures, and 2023 was the warmest year on record at +3.7°F above the historical baseline.

Key Climate Facts

Rate of Change

+0.2°F

per decade

Warmest Year

2023

+3.7°F anomaly

Recent Warm Years

10 / 10

above-average years

Decade Shift

+1.9°F

2020s vs 1930s

Compared to the National Average

Port Sulphur is warming at roughly the national average rate.

National: +0.20°F/decade
Port Sulphur: +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 Port Sulphur's long-term warming trend.

Temperature anomaly spiral for Port Sulphur, Louisiana
Climate spiral: monthly temperature anomalies from 96+ years of NOAA records for Port Sulphur, LA.

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.

Warming stripes for Port Sulphur, Louisiana
Warming stripes: each stripe is one year of average temperature anomaly for Port Sulphur, LA.

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 trend chart for Port Sulphur, Louisiana
Linear trend: annual temperature anomalies with trend line for Port Sulphur, LA.

Temperature by Decade

1930s
+0.60°F
1940s
+0.32°F
1950s
+0.77°F
1960s
-0.21°F
1970s
-0.10°F
1980s
+0.06°F
1990s
+0.91°F
2000s
+1.26°F
2010s
+1.65°F
2020s
+2.53°F

Average temperature anomaly per decade relative to the historical baseline period.

Anomaly Scale

-3.4°F Colder Normal +5.4°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 Port Sulphur, LA. Filter by decade or download as CSV.

Data Sources & Audit

Station
nClimGrid 5km Grid Point
Distance
0.4 mi
Coverage
99.1%
Records
1,154
Range
1930-01 – 2026-02
Full Data Audit 1,154 records
YearMonthTempBaselineAnomalySourceGap
1930Jan53.3°F52.5°F+0.9°NCLIMGRID
1930Feb59.2°F54.7°F+4.6°NCLIMGRID
1930Mar58.5°F61.2°F-2.8°NCLIMGRID
1930Apr68.8°F68.7°F+0.1°NCLIMGRID
1930May76.3°F75.3°F+1.0°NCLIMGRID
1930Jun79.4°F81.1°F-1.7°NCLIMGRID
1930Jul82.3°F82.7°F-0.4°NCLIMGRID
1930Aug81.5°F82.3°F-0.8°NCLIMGRID
1930Sep79.7°F79.3°F+0.3°NCLIMGRID
1930Oct71.2°F70.9°F+0.3°NCLIMGRID
1930Nov62.4°F62.6°F-0.2°NCLIMGRID
1930Dec51.9°F56.0°F-4.0°NCLIMGRID
1931Jan51.3°F52.5°F-1.1°NCLIMGRID
1931Feb57.0°F54.7°F+2.4°NCLIMGRID
1931Mar56.4°F61.2°F-4.8°NCLIMGRID
1931Apr65.1°F68.7°F-3.6°NCLIMGRID
1931May72.5°F75.3°F-2.8°NCLIMGRID
1931Jun80.1°F81.1°F-1.0°NCLIMGRID
1931Jul83.2°F82.7°F+0.5°NCLIMGRID
1931Aug80.2°F82.3°F-2.1°NCLIMGRID
1931Sep81.3°F79.3°F+2.0°NCLIMGRID
1931Oct74.5°F70.9°F+3.6°NCLIMGRID
1931Nov67.9°F62.6°F+5.3°NCLIMGRID
1931Dec62.6°F56.0°F+6.6°NCLIMGRID
1932Jan60.0°F52.5°F+7.6°NCLIMGRID
1932Feb65.6°F54.7°F+10.9°NCLIMGRID
1932Mar57.8°F61.2°F-3.4°NCLIMGRID
1932Apr68.3°F68.7°F-0.4°NCLIMGRID
1932May73.4°F75.3°F-1.9°NCLIMGRID
1932Jun81.8°F81.1°F+0.6°NCLIMGRID
1932Jul84.1°F82.7°F+1.4°NCLIMGRID
1932Aug82.3°F82.3°F+0.0°NCLIMGRID
1932Sep79.3°F79.3°F+0.0°NCLIMGRID
1932Oct70.0°F70.9°F-1.0°NCLIMGRID
1932Nov56.6°F62.6°F-6.0°NCLIMGRID
1932Dec57.9°F56.0°F+1.9°NCLIMGRID
1933Jan58.1°F52.5°F+5.7°NCLIMGRID
1933Feb57.5°F54.7°F+2.8°NCLIMGRID
1933Mar62.2°F61.2°F+1.0°NCLIMGRID
1933Apr68.8°F68.7°F+0.1°NCLIMGRID
1933May79.1°F75.3°F+3.9°NCLIMGRID
1933Jun79.9°F81.1°F-1.2°NCLIMGRID
1933Jul81.8°F82.7°F-0.9°NCLIMGRID
1933Aug82.5°F82.3°F+0.2°NCLIMGRID
1933Sep83.5°F79.3°F+4.1°NCLIMGRID
1933Oct73.3°F70.9°F+2.4°NCLIMGRID
1933Nov63.5°F62.6°F+0.9°NCLIMGRID
1933Dec63.6°F56.0°F+7.6°NCLIMGRID
1934Jan56.7°F52.5°F+4.2°NCLIMGRID
1934Feb55.7°F54.7°F+1.0°NCLIMGRID
1934Mar60.0°F61.2°F-1.3°NCLIMGRID
1934Apr68.0°F68.7°F-0.7°NCLIMGRID
1934May74.5°F75.3°F-0.8°NCLIMGRID
1934Jun81.5°F81.1°F+0.4°NCLIMGRID
1934Jul82.5°F82.7°F-0.2°NCLIMGRID
1934Aug82.0°F82.3°F-0.3°NCLIMGRID
1934Sep78.6°F79.3°F-0.7°NCLIMGRID
1934Oct74.4°F70.9°F+3.5°NCLIMGRID
1934Nov65.1°F62.6°F+2.5°NCLIMGRID
1934Dec54.7°F56.0°F-1.3°NCLIMGRID
1935Jan55.6°F52.5°F+3.2°NCLIMGRID
1935Feb56.8°F54.7°F+2.1°NCLIMGRID
1935Mar65.4°F61.2°F+4.2°NCLIMGRID
1935Apr69.1°F68.7°F+0.4°NCLIMGRID
1935May76.9°F75.3°F+1.6°NCLIMGRID
1935Jun80.5°F81.1°F-0.7°NCLIMGRID
1935Jul82.0°F82.7°F-0.8°NCLIMGRID
1935Aug82.8°F82.3°F+0.5°NCLIMGRID
1935Sep78.7°F79.3°F-0.6°NCLIMGRID
1935Oct73.9°F70.9°F+3.0°NCLIMGRID
1935Nov61.7°F62.6°F-0.9°NCLIMGRID
1935Dec50.7°F56.0°F-5.3°NCLIMGRID
1936Jan53.9°F52.5°F+1.5°NCLIMGRID
1936Feb52.5°F54.7°F-2.1°NCLIMGRID
1936Mar62.6°F61.2°F+1.3°NCLIMGRID
1936Apr66.6°F68.7°F-2.2°NCLIMGRID
1936May74.3°F75.3°F-1.0°NCLIMGRID
1936Jun82.0°F81.1°F+0.9°NCLIMGRID
1936Jul82.5°F82.7°F-0.2°NCLIMGRID
1936Aug82.3°F82.3°F+0.0°NCLIMGRID
1936Sep81.9°F79.3°F+2.5°NCLIMGRID
1936Oct73.5°F70.9°F+2.6°NCLIMGRID
1936Nov60.2°F62.6°F-2.4°NCLIMGRID
1936Dec55.9°F56.0°F-0.1°NCLIMGRID
1937Jan64.8°F52.5°F+12.3°NCLIMGRID
1937Feb55.7°F54.7°F+1.0°NCLIMGRID
1937Mar56.9°F61.2°F-4.3°NCLIMGRID
1937Apr67.9°F68.7°F-0.8°NCLIMGRID
1937May75.9°F75.3°F+0.7°NCLIMGRID
1937Jun81.4°F81.1°F+0.2°NCLIMGRID
1937Jul82.7°F82.7°F+0.0°NCLIMGRID
1937Aug82.7°F82.3°F+0.4°NCLIMGRID
1937Sep79.1°F79.3°F-0.2°NCLIMGRID
1937Oct70.3°F70.9°F-0.6°NCLIMGRID
1937Nov57.5°F62.6°F-5.1°NCLIMGRID
1937Dec54.0°F56.0°F-2.0°NCLIMGRID
1938Jan54.5°F52.5°F+2.1°NCLIMGRID
1938Feb59.7°F54.7°F+5.1°NCLIMGRID
1938Mar67.2°F61.2°F+6.0°NCLIMGRID
1938Apr66.6°F68.7°F-2.2°NCLIMGRID
1938May75.1°F75.3°F-0.2°NCLIMGRID
1938Jun80.7°F81.1°F-0.4°NCLIMGRID
1938Jul81.7°F82.7°F-1.0°NCLIMGRID
1938Aug83.4°F82.3°F+1.1°NCLIMGRID
1938Sep78.2°F79.3°F-1.2°NCLIMGRID
1938Oct71.2°F70.9°F+0.3°NCLIMGRID
1938Nov61.6°F62.6°F-1.0°NCLIMGRID
1938Dec54.4°F56.0°F-1.6°NCLIMGRID
1939Jan57.8°F52.5°F+5.4°NCLIMGRID
1939Feb59.7°F54.7°F+5.0°NCLIMGRID
1939Mar63.5°F61.2°F+2.2°NCLIMGRID
1939Apr67.7°F68.7°F-1.1°NCLIMGRID
1939May73.8°F75.3°F-1.5°NCLIMGRID
1939Jun81.2°F81.1°F+0.1°NCLIMGRID
1939Jul82.7°F82.7°F+0.0°NCLIMGRID
1939Aug81.9°F82.3°F-0.4°NCLIMGRID
1939Sep80.6°F79.3°F+1.3°NCLIMGRID
1939Oct72.5°F70.9°F+1.6°NCLIMGRID
1939Nov59.2°F62.6°F-3.4°NCLIMGRID
1939Dec57.7°F56.0°F+1.7°NCLIMGRID
1940Jan42.6°F52.5°F-9.8°NCLIMGRID
1940Feb52.8°F54.7°F-1.9°NCLIMGRID
1940Mar60.2°F61.2°F-1.0°NCLIMGRID
1940Apr66.8°F68.7°F-1.9°NCLIMGRID
1940May73.4°F75.3°F-1.9°NCLIMGRID
1940Jun79.4°F81.1°F-1.7°NCLIMGRID
1940Jul81.1°F82.7°F-1.6°NCLIMGRID
1940Aug81.8°F82.3°F-0.6°NCLIMGRID
1940Sep77.3°F79.3°F-2.0°NCLIMGRID
1940Oct71.2°F70.9°F+0.3°NCLIMGRID
1940Nov61.7°F62.6°F-0.9°NCLIMGRID
1940Dec58.0°F56.0°F+2.0°NCLIMGRID
1941Jan54.2°F52.5°F+1.7°NCLIMGRID
1941Feb51.7°F54.7°F-3.0°NCLIMGRID
1941Mar56.2°F61.2°F-5.0°NCLIMGRID
1941Apr70.4°F68.7°F+1.6°NCLIMGRID
1941May75.5°F75.3°F+0.2°NCLIMGRID
1941Jun80.8°F81.1°F-0.3°NCLIMGRID
1941Jul82.3°F82.7°F-0.4°NCLIMGRID
1941Aug84.0°F82.3°F+1.7°NCLIMGRID
1941Sep80.9°F79.3°F+1.6°NCLIMGRID
1941Oct78.1°F70.9°F+7.1°NCLIMGRID
1941Nov59.6°F62.6°F-3.0°NCLIMGRID
1941Dec57.2°F56.0°F+1.2°NCLIMGRID
1942Jan50.2°F52.5°F-2.3°NCLIMGRID
1942Feb51.4°F54.7°F-3.3°NCLIMGRID
1942Mar58.9°F61.2°F-2.3°NCLIMGRID
1942Apr67.2°F68.7°F-1.5°NCLIMGRID
1942May74.2°F75.3°F-1.0°NCLIMGRID
1942Jun80.6°F81.1°F-0.5°NCLIMGRID
1942Jul82.0°F82.7°F-0.8°NCLIMGRID
1942Aug81.7°F82.3°F-0.6°NCLIMGRID
1942Sep77.5°F79.3°F-1.8°NCLIMGRID
1942Oct72.4°F70.9°F+1.4°NCLIMGRID
1942Nov63.8°F62.6°F+1.3°NCLIMGRID
1942Dec56.9°F56.0°F+0.9°NCLIMGRID
1943Jan53.7°F52.5°F+1.3°NCLIMGRID
1943Feb56.5°F54.7°F+1.9°NCLIMGRID
1943Mar59.2°F61.2°F-2.1°NCLIMGRID
1943Apr68.4°F68.7°F-0.4°NCLIMGRID
1943May78.0°F75.3°F+2.7°NCLIMGRID
1943Jun82.5°F81.1°F+1.3°NCLIMGRID
1943Jul83.1°F82.7°F+0.4°NCLIMGRID
1943Aug83.7°F82.3°F+1.4°NCLIMGRID
1943Sep77.7°F79.3°F-1.6°NCLIMGRID
1943Oct68.6°F70.9°F-2.4°NCLIMGRID
1943Nov58.6°F62.6°F-4.0°NCLIMGRID
1943Dec55.7°F56.0°F-0.3°NCLIMGRID
1944Jan54.1°F52.5°F+1.6°NCLIMGRID
1944Feb62.8°F54.7°F+8.2°NCLIMGRID
1944Mar63.1°F61.2°F+1.9°NCLIMGRID
1944Apr67.7°F68.7°F-1.1°NCLIMGRID
1944May75.5°F75.3°F+0.3°NCLIMGRID
1944Jun82.7°F81.1°F+1.6°NCLIMGRID
1944Jul82.1°F82.7°F-0.6°NCLIMGRID
1944Aug82.2°F82.3°F-0.1°NCLIMGRID
1944Sep80.5°F79.3°F+1.2°NCLIMGRID
1944Oct69.8°F70.9°F-1.1°NCLIMGRID
1944Nov63.7°F62.6°F+1.1°NCLIMGRID
1944Dec54.3°F56.0°F-1.6°NCLIMGRID
1945Jan53.2°F52.5°F+0.7°NCLIMGRID
1945Feb60.2°F54.7°F+5.5°NCLIMGRID
1945Mar67.1°F61.2°F+5.9°NCLIMGRID
1945Apr71.2°F68.7°F+2.4°NCLIMGRID
1945May73.7°F75.3°F-1.6°NCLIMGRID
1945Jun81.9°F81.1°F+0.8°NCLIMGRID
1945Jul81.1°F82.7°F-1.6°NCLIMGRID
1945Aug82.7°F82.3°F+0.3°NCLIMGRID
1945Sep81.0°F79.3°F+1.6°NCLIMGRID
1945Oct70.7°F70.9°F-0.2°NCLIMGRID
1945Nov64.2°F62.6°F+1.6°NCLIMGRID
1945Dec51.7°F56.0°F-4.3°NCLIMGRID
1946Jan54.5°F52.5°F+2.0°NCLIMGRID
1946Feb57.0°F54.7°F+2.3°NCLIMGRID
1946Mar63.6°F61.2°F+2.4°NCLIMGRID
1946Apr70.5°F68.7°F+1.7°NCLIMGRID
1946May75.1°F75.3°F-0.2°NCLIMGRID
1946Jun79.5°F81.1°F-1.6°NCLIMGRID
1946Jul82.2°F82.7°F-0.5°NCLIMGRID
1946Aug82.9°F82.3°F+0.6°NCLIMGRID
1946Sep78.5°F79.3°F-0.9°NCLIMGRID
1946Oct73.0°F70.9°F+2.0°NCLIMGRID
1946Nov66.8°F62.6°F+4.2°NCLIMGRID
1946Dec58.9°F56.0°F+2.9°NCLIMGRID
1947Jan57.6°F52.5°F+5.2°NCLIMGRID
1947Feb49.8°F54.7°F-4.9°NCLIMGRID
1947Mar56.4°F61.2°F-4.8°NCLIMGRID
1947Apr69.9°F68.7°F+1.2°NCLIMGRID
1947May75.6°F75.3°F+0.3°NCLIMGRID
1947Jun81.7°F81.1°F+0.6°NCLIMGRID
1947Jul81.7°F82.7°F-1.0°NCLIMGRID
1947Aug82.9°F82.3°F+0.6°NCLIMGRID
1947Sep81.0°F79.3°F+1.7°NCLIMGRID
1947Oct75.3°F70.9°F+4.3°NCLIMGRID
1947Nov61.2°F62.6°F-1.4°NCLIMGRID
1947Dec55.3°F56.0°F-0.7°NCLIMGRID
1948Jan47.2°F52.5°F-5.3°NCLIMGRID
1948Feb56.9°F54.7°F+2.3°NCLIMGRID
1948Mar64.3°F61.2°F+3.1°NCLIMGRID
1948Apr70.9°F68.7°F+2.1°NCLIMGRID
1948May76.6°F75.3°F+1.3°NCLIMGRID
1948Jun81.9°F81.1°F+0.8°NCLIMGRID
1948Jul82.7°F82.7°F-0.1°NCLIMGRID
1948Aug82.1°F82.3°F-0.2°NCLIMGRID
1948Sep77.3°F79.3°F-2.1°NCLIMGRID
1948Oct70.6°F70.9°F-0.3°NCLIMGRID
1948Nov63.8°F62.6°F+1.2°NCLIMGRID
1948Dec60.5°F56.0°F+4.6°NCLIMGRID
1949Jan59.8°F52.5°F+7.3°NCLIMGRID
1949Feb60.7°F54.7°F+6.1°NCLIMGRID
1949Mar61.3°F61.2°F+0.1°NCLIMGRID
1949Apr67.7°F68.7°F-1.0°NCLIMGRID
1949May76.8°F75.3°F+1.5°NCLIMGRID
1949Jun81.8°F81.1°F+0.7°NCLIMGRID
1949Jul82.2°F82.7°F-0.5°NCLIMGRID
1949Aug82.8°F82.3°F+0.5°NCLIMGRID
1949Sep79.4°F79.3°F+0.1°NCLIMGRID
1949Oct76.0°F70.9°F+5.1°NCLIMGRID
1949Nov60.8°F62.6°F-1.8°NCLIMGRID
1949Dec59.8°F56.0°F+3.8°NCLIMGRID
1950Jan67.4°F52.5°F+14.9°NCLIMGRID
1950Feb60.8°F54.7°F+6.1°NCLIMGRID
1950Mar59.0°F61.2°F-2.2°NCLIMGRID
1950Apr65.5°F68.7°F-3.2°NCLIMGRID
1950May77.1°F75.3°F+1.9°NCLIMGRID
1950Jun81.8°F81.1°F+0.7°NCLIMGRID
1950Jul81.2°F82.7°F-1.5°NCLIMGRID
1950Aug82.4°F82.3°F+0.1°NCLIMGRID
1950Sep79.9°F79.3°F+0.6°NCLIMGRID
1950Oct73.1°F70.9°F+2.2°NCLIMGRID
1950Nov60.1°F62.6°F-2.5°NCLIMGRID
1950Dec52.4°F56.0°F-3.6°NCLIMGRID
1951Jan55.7°F52.5°F+3.2°NCLIMGRID
1951Feb55.2°F54.7°F+0.6°NCLIMGRID
1951Mar62.8°F61.2°F+1.5°NCLIMGRID
1951Apr65.9°F68.7°F-2.8°NCLIMGRID
1951May75.3°F75.3°F+0.0°NCLIMGRID
1951Jun82.1°F81.1°F+1.0°NCLIMGRID
1951Jul83.6°F82.7°F+0.9°NCLIMGRID
1951Aug85.7°F82.3°F+3.3°NCLIMGRID
1951Sep81.0°F79.3°F+1.7°NCLIMGRID
1951Oct73.7°F70.9°F+2.7°NCLIMGRID
1951Nov57.7°F62.6°F-4.9°NCLIMGRID
1951Dec59.1°F56.0°F+3.1°NCLIMGRID
1952Jan61.8°F52.5°F+9.3°NCLIMGRID
1952Feb58.5°F54.7°F+3.8°NCLIMGRID
1952Mar60.5°F61.2°F-0.7°NCLIMGRID
1952Apr65.5°F68.7°F-3.2°NCLIMGRID
1952May76.0°F75.3°F+0.7°NCLIMGRID
1952Jun84.1°F81.1°F+3.0°NCLIMGRID
1952Jul83.5°F82.7°F+0.8°NCLIMGRID
1952Aug82.9°F82.3°F+0.6°NCLIMGRID
1952Sep77.8°F79.3°F-1.5°NCLIMGRID
1952Oct66.3°F70.9°F-4.6°NCLIMGRID
1952Nov60.0°F62.6°F-2.6°NCLIMGRID
1952Dec55.0°F56.0°F-1.0°NCLIMGRID
1953Jan56.2°F52.5°F+3.8°NCLIMGRID
1953Feb57.2°F54.7°F+2.6°NCLIMGRID
1953Mar65.7°F61.2°F+4.5°NCLIMGRID
1953Apr68.6°F68.7°F-0.1°NCLIMGRID
1953May78.0°F75.3°F+2.7°NCLIMGRID
1953Jun83.9°F81.1°F+2.8°NCLIMGRID
1953Jul82.7°F82.7°F+0.0°NCLIMGRID
1953Aug82.2°F82.3°F-0.1°NCLIMGRID
1953Sep78.8°F79.3°F-0.5°NCLIMGRID
1953Oct72.7°F70.9°F+1.7°NCLIMGRID
1953Nov61.8°F62.6°F-0.7°NCLIMGRID
1953Dec54.3°F56.0°F-1.7°NCLIMGRID
1954Jan57.5°F52.5°F+5.0°NCLIMGRID
1954Feb59.2°F54.7°F+4.5°NCLIMGRID
1954Mar60.4°F61.2°F-0.8°NCLIMGRID
1954Apr71.9°F68.7°F+3.2°NCLIMGRID
1954May72.6°F75.3°F-2.6°NCLIMGRID
1954Jun81.9°F81.1°F+0.8°NCLIMGRID
1954Jul83.4°F82.7°F+0.7°NCLIMGRID
1954Aug84.4°F82.3°F+2.1°NCLIMGRID
1954Sep81.4°F79.3°F+2.1°NCLIMGRID
1954Oct73.3°F70.9°F+2.4°NCLIMGRID
1954Nov60.0°F62.6°F-2.6°NCLIMGRID
1954Dec56.3°F56.0°F+0.3°NCLIMGRID
1955Jan54.0°F52.5°F+1.5°NCLIMGRID
1955Feb58.3°F54.7°F+3.6°NCLIMGRID
1955Mar64.9°F61.2°F+3.7°NCLIMGRID
1955Apr70.9°F68.7°F+2.2°NCLIMGRID
1955May78.2°F75.3°F+2.9°NCLIMGRID
1955Jun79.4°F81.1°F-1.7°NCLIMGRID
1955Jul82.6°F82.7°F-0.1°NCLIMGRID
1955Aug82.6°F82.3°F+0.3°NCLIMGRID
1955Sep81.1°F79.3°F+1.7°NCLIMGRID
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1987Jan50.2°F52.5°F-2.2°NCLIMGRID
1987Feb56.2°F54.7°F+1.5°NCLIMGRID
1987Mar59.4°F61.2°F-1.8°NCLIMGRID
1987Apr66.0°F68.7°F-2.7°NCLIMGRID
1987May76.5°F75.3°F+1.2°NCLIMGRID
1987Jun79.9°F81.1°F-1.2°NCLIMGRID
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1987Nov62.6°F62.6°F+0.1°NCLIMGRID
1987Dec59.1°F56.0°F+3.1°NCLIMGRID
1988Jan49.3°F52.5°F-3.1°NCLIMGRID
1988Feb52.9°F54.7°F-1.7°NCLIMGRID
1988Mar60.3°F61.2°F-0.9°NCLIMGRID
1988Apr69.2°F68.7°F+0.5°NCLIMGRID
1988May73.7°F75.3°F-1.6°NCLIMGRID
1988Jun79.7°F81.1°F-1.4°NCLIMGRID
1988Jul82.3°F82.7°F-0.4°NCLIMGRID
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1988Nov66.9°F62.6°F+4.3°NCLIMGRID
1988Dec57.1°F56.0°F+1.2°NCLIMGRID
1989Jan60.8°F52.5°F+8.3°NCLIMGRID
1989Feb55.5°F54.7°F+0.8°NCLIMGRID
1989Mar62.7°F61.2°F+1.4°NCLIMGRID
1989Apr68.1°F68.7°F-0.7°NCLIMGRID
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1989Nov63.7°F62.6°F+1.1°NCLIMGRID
1989Dec47.4°F56.0°F-8.6°NCLIMGRID
1990Jan57.9°F52.5°F+5.5°NCLIMGRID
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1990Mar63.2°F61.2°F+2.0°NCLIMGRID
1990Apr68.3°F68.7°F-0.4°NCLIMGRID
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1990Jun83.1°F81.1°F+2.0°NCLIMGRID
1990Jul82.5°F82.7°F-0.2°NCLIMGRID
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1990Oct69.4°F70.9°F-1.5°NCLIMGRID
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1991Jan54.0°F52.5°F+1.6°NCLIMGRID
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1991Apr71.1°F68.7°F+2.3°NCLIMGRID
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1991Nov56.8°F62.6°F-5.8°NCLIMGRID
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1997Jan55.3°F52.5°F+2.8°NCLIMGRID
1997Feb57.0°F54.7°F+2.4°NCLIMGRID
1997Mar66.0°F61.2°F+4.8°NCLIMGRID
1997Apr65.1°F68.7°F-3.6°NCLIMGRID
1997May75.1°F75.3°F-0.1°NCLIMGRID
1997Jun80.1°F81.1°F-1.1°NCLIMGRID
1997Jul83.2°F82.7°F+0.5°NCLIMGRID
1997Aug83.3°F82.3°F+1.0°NCLIMGRID
1997Sep81.5°F79.3°F+2.2°NCLIMGRID
1997Oct71.4°F70.9°F+0.5°NCLIMGRID
1997Nov59.9°F62.6°F-2.7°NCLIMGRID
1997Dec53.9°F56.0°F-2.1°NCLIMGRID
1998Jan56.4°F52.5°F+4.0°NCLIMGRID
1998Feb55.8°F54.7°F+1.1°NCLIMGRID
1998Mar59.2°F61.2°F-2.0°NCLIMGRID
1998Apr67.5°F68.7°F-1.3°NCLIMGRID
1998May77.6°F75.3°F+2.3°NCLIMGRID
1998Jun83.9°F81.1°F+2.7°NCLIMGRID
1998Jul85.4°F82.7°F+2.7°NCLIMGRID
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1998Sep81.8°F79.3°F+2.5°NCLIMGRID
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1998Nov66.6°F62.6°F+4.0°NCLIMGRID
1998Dec60.4°F56.0°F+4.5°NCLIMGRID
1999Jan58.3°F52.5°F+5.8°NCLIMGRID
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1999Apr73.1°F68.7°F+4.4°NCLIMGRID
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1999Aug86.1°F82.3°F+3.7°NCLIMGRID
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2000Jan57.6°F52.5°F+5.1°NCLIMGRID
2000Feb60.5°F54.7°F+5.8°NCLIMGRID
2000Mar66.5°F61.2°F+5.2°NCLIMGRID
2000Apr69.1°F68.7°F+0.3°NCLIMGRID
2000May78.9°F75.3°F+3.6°NCLIMGRID
2000Jun81.2°F81.1°F+0.1°NCLIMGRID
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2000Oct70.5°F70.9°F-0.4°NCLIMGRID
2000Nov61.3°F62.6°F-1.3°NCLIMGRID
2000Dec50.7°F56.0°F-5.3°NCLIMGRID
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2001Mar59.7°F61.2°F-1.5°NCLIMGRID
2001Apr71.3°F68.7°F+2.6°NCLIMGRID
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2002Jan56.3°F52.5°F+3.9°NCLIMGRID
2002Feb53.1°F54.7°F-1.6°NCLIMGRID
2002Mar61.5°F61.2°F+0.3°NCLIMGRID
2002Apr72.1°F68.7°F+3.4°NCLIMGRID
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2002Oct75.5°F70.9°F+4.6°NCLIMGRID
2002Nov61.0°F62.6°F-1.6°NCLIMGRID
2002Dec55.0°F56.0°F-1.0°NCLIMGRID
2003Jan49.4°F52.5°F-3.1°NCLIMGRID
2003Feb55.8°F54.7°F+1.2°NCLIMGRID
2003Mar62.4°F61.2°F+1.2°NCLIMGRID
2003Apr69.1°F68.7°F+0.4°NCLIMGRID
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2003Jun81.2°F81.1°F+0.1°NCLIMGRID
2003Jul81.7°F82.7°F-1.0°NCLIMGRID
2003Aug82.8°F82.3°F+0.5°NCLIMGRID
2003Sep79.5°F79.3°F+0.2°NCLIMGRID
2003Oct71.7°F70.9°F+0.7°NCLIMGRID
2003Nov66.2°F62.6°F+3.6°NCLIMGRID
2003Dec53.3°F56.0°F-2.7°NCLIMGRID
2004Jan54.3°F52.5°F+1.9°NCLIMGRID
2004Feb53.9°F54.7°F-0.8°NCLIMGRID
2004Mar65.1°F61.2°F+3.9°NCLIMGRID
2004Apr68.3°F68.7°F-0.4°NCLIMGRID
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2004Nov67.4°F62.6°F+4.9°NCLIMGRID
2004Dec54.2°F56.0°F-1.8°NCLIMGRID
2005Jan58.9°F52.5°F+6.4°NCLIMGRID
2005Feb59.2°F54.7°F+4.5°NCLIMGRID
2005Mar61.3°F61.2°F+0.1°NCLIMGRID
2005Apr68.1°F68.7°F-0.7°NCLIMGRID
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2005Jun81.3°F81.1°F+0.2°NCLIMGRID
2005Jul83.0°F82.7°F+0.3°NCLIMGRID
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2005Sep83.2°F79.3°F+3.9°NCLIMGRID
2005Oct71.2°F70.9°F+0.2°NCLIMGRID
2005Nov65.5°F62.6°F+2.9°NCLIMGRID
2005Dec54.5°F56.0°F-1.5°NCLIMGRID
2006Jan59.8°F52.5°F+7.3°NCLIMGRID
2006Feb56.7°F54.7°F+2.1°NCLIMGRID
2006Mar64.3°F61.2°F+3.1°NCLIMGRID
2006Apr72.5°F68.7°F+3.7°NCLIMGRID
2006May76.4°F75.3°F+1.2°NCLIMGRID
2006Jun83.6°F81.1°F+2.5°NCLIMGRID
2006Jul83.0°F82.7°F+0.3°NCLIMGRID
2006Aug84.3°F82.3°F+2.0°NCLIMGRID
2006Sep79.6°F79.3°F+0.3°NCLIMGRID
2006Oct72.6°F70.9°F+1.7°NCLIMGRID
2006Nov62.0°F62.6°F-0.6°NCLIMGRID
2006Dec56.9°F56.0°F+1.0°NCLIMGRID
2007Jan54.7°F52.5°F+2.2°NCLIMGRID
2007Feb53.8°F54.7°F-0.9°NCLIMGRID
2007Mar64.0°F61.2°F+2.8°NCLIMGRID
2007Apr67.4°F68.7°F-1.3°NCLIMGRID
2007May75.4°F75.3°F+0.1°NCLIMGRID
2007Jun81.9°F81.1°F+0.7°NCLIMGRID
2007Jul82.7°F82.7°F-0.1°NCLIMGRID
2007Aug85.3°F82.3°F+3.0°NCLIMGRID
2007Sep81.8°F79.3°F+2.5°NCLIMGRID
2007Oct73.7°F70.9°F+2.7°NCLIMGRID
2007Nov64.2°F62.6°F+1.6°NCLIMGRID
2007Dec61.0°F56.0°F+5.1°NCLIMGRID
2008Jan53.3°F52.5°F+0.9°NCLIMGRID
2008Feb59.3°F54.7°F+4.7°NCLIMGRID
2008Mar61.1°F61.2°F-0.2°NCLIMGRID
2008Apr69.3°F68.7°F+0.6°NCLIMGRID
2008May76.2°F75.3°F+0.9°NCLIMGRID
2008Jun82.6°F81.1°F+1.5°NCLIMGRID
2008Jul83.8°F82.7°F+1.0°NCLIMGRID
2008Aug82.3°F82.3°F+0.0°NCLIMGRID
2008Sep78.9°F79.3°F-0.4°NCLIMGRID
2008Oct71.3°F70.9°F+0.4°NCLIMGRID
2008Nov62.0°F62.6°F-0.6°NCLIMGRID
2008Dec59.6°F56.0°F+3.7°NCLIMGRID
2009Jan56.0°F52.5°F+3.6°NCLIMGRID
2009Feb58.5°F54.7°F+3.8°NCLIMGRID
2009Mar64.3°F61.2°F+3.1°NCLIMGRID
2009Apr68.5°F68.7°F-0.3°NCLIMGRID
2009May77.2°F75.3°F+1.9°NCLIMGRID
2009Jun83.3°F81.1°F+2.2°NCLIMGRID
2009Jul83.9°F82.7°F+1.2°NCLIMGRID
2009Aug82.6°F82.3°F+0.3°NCLIMGRID
2009Sep80.9°F79.3°F+1.6°NCLIMGRID
2009Oct73.2°F70.9°F+2.3°NCLIMGRID
2009Nov61.7°F62.6°F-0.9°NCLIMGRID
2009Dec54.5°F56.0°F-1.5°NCLIMGRID
2010Jan48.6°F52.5°F-3.8°NCLIMGRID
2010Feb48.5°F54.7°F-6.2°NCLIMGRID
2010Mar57.2°F61.2°F-4.0°NCLIMGRID
2010Apr69.2°F68.7°F+0.5°NCLIMGRID
2010May78.8°F75.3°F+3.5°NCLIMGRID
2010Jun84.1°F81.1°F+3.0°NCLIMGRID
2010Jul84.7°F82.7°F+2.0°NCLIMGRID
2010Aug85.2°F82.3°F+2.8°NCLIMGRID
2010Sep81.8°F79.3°F+2.4°NCLIMGRID
2010Oct71.7°F70.9°F+0.7°NCLIMGRID
2010Nov64.2°F62.6°F+1.6°NCLIMGRID
2010Dec51.6°F56.0°F-4.4°NCLIMGRID
2011Jan51.4°F52.5°F-1.1°NCLIMGRID
2011Feb55.7°F54.7°F+1.1°NCLIMGRID
2011Mar65.6°F61.2°F+4.4°NCLIMGRID
2011Apr72.5°F68.7°F+3.8°NCLIMGRID
2011May76.3°F75.3°F+1.0°NCLIMGRID
2011Jun84.7°F81.1°F+3.6°NCLIMGRID
2011Jul84.3°F82.7°F+1.6°NCLIMGRID
2011Aug86.6°F82.3°F+4.3°NCLIMGRID
2011Sep78.5°F79.3°F-0.8°NCLIMGRID
2011Oct69.4°F70.9°F-1.5°NCLIMGRID
2011Nov65.0°F62.6°F+2.4°NCLIMGRID
2011Dec58.1°F56.0°F+2.1°NCLIMGRID
2012Jan59.7°F52.5°F+7.2°NCLIMGRID
2012Feb60.2°F54.7°F+5.5°NCLIMGRID
2012Mar69.1°F61.2°F+7.9°NCLIMGRID
2012Apr71.5°F68.7°F+2.7°NCLIMGRID
2012May78.0°F75.3°F+2.7°NCLIMGRID
2012Jun81.9°F81.1°F+0.8°NCLIMGRID
2012Jul83.2°F82.7°F+0.5°NCLIMGRID
2012Aug82.9°F82.3°F+0.5°NCLIMGRID
2012Sep80.4°F79.3°F+1.1°NCLIMGRID
2012Oct70.9°F70.9°F+0.0°NCLIMGRID
2012Nov61.0°F62.6°F-1.5°NCLIMGRID
2012Dec59.8°F56.0°F+3.9°NCLIMGRID
2013Jan57.0°F52.5°F+4.5°NCLIMGRID
2013Feb58.2°F54.7°F+3.6°NCLIMGRID
2013Mar57.5°F61.2°F-3.7°NCLIMGRID
2013Apr67.7°F68.7°F-1.0°NCLIMGRID
2013May73.5°F75.3°F-1.8°NCLIMGRID
2013Jun83.2°F81.1°F+2.0°NCLIMGRID
2013Jul82.4°F82.7°F-0.3°NCLIMGRID
2013Aug82.2°F82.3°F-0.1°NCLIMGRID
2013Sep82.0°F79.3°F+2.6°NCLIMGRID
2013Oct73.9°F70.9°F+2.9°NCLIMGRID
2013Nov61.0°F62.6°F-1.6°NCLIMGRID
2013Dec55.7°F56.0°F-0.2°NCLIMGRID
2014Jan47.1°F52.5°F-5.4°NCLIMGRID
2014Feb55.3°F54.7°F+0.6°NCLIMGRID
2014Mar57.5°F61.2°F-3.7°NCLIMGRID
2014Apr68.2°F68.7°F-0.5°NCLIMGRID
2014May74.3°F75.3°F-1.0°NCLIMGRID
2014Jun81.5°F81.1°F+0.4°NCLIMGRID
2014Jul82.6°F82.7°F-0.1°NCLIMGRID
2014Aug84.1°F82.3°F+1.7°NCLIMGRID
2014Sep81.2°F79.3°F+1.9°NCLIMGRID
2014Oct73.6°F70.9°F+2.7°NCLIMGRID
2014Nov58.3°F62.6°F-4.2°NCLIMGRID
2014Dec60.0°F56.0°F+4.1°NCLIMGRID
2015Jan52.8°F52.5°F+0.3°NCLIMGRID
2015Feb52.4°F54.7°F-2.2°NCLIMGRID
2015Mar65.3°F61.2°F+4.0°NCLIMGRID
2015Apr73.5°F68.7°F+4.7°NCLIMGRID
2015May77.8°F75.3°F+2.5°NCLIMGRID
2015Jun83.0°F81.1°F+1.9°NCLIMGRID
2015Jul86.1°F82.7°F+3.4°NCLIMGRID
2015Aug84.7°F82.3°F+2.4°NCLIMGRID
2015Sep80.6°F79.3°F+1.3°NCLIMGRID
2015Oct73.4°F70.9°F+2.5°NCLIMGRID
2015Nov68.0°F62.6°F+5.4°NCLIMGRID
2015Dec64.7°F56.0°F+8.8°NCLIMGRID
2016Jan53.1°F52.5°F+0.7°NCLIMGRID
2016Feb57.1°F54.7°F+2.5°NCLIMGRID
2016Mar66.0°F61.2°F+4.8°NCLIMGRID
2016Apr70.1°F68.7°F+1.3°NCLIMGRID
2016May75.4°F75.3°F+0.1°NCLIMGRID
2016Jun82.3°F81.1°F+1.2°NCLIMGRID
2016Jul84.7°F82.7°F+2.0°NCLIMGRID
2016Aug83.3°F82.3°F+1.0°NCLIMGRID
2016Sep82.5°F79.3°F+3.1°NCLIMGRID
2016Oct75.5°F70.9°F+4.6°NCLIMGRID
2016Nov66.6°F62.6°F+4.0°NCLIMGRID
2016Dec60.1°F56.0°F+4.1°NCLIMGRID
2017Jan60.3°F52.5°F+7.8°NCLIMGRID
2017Feb63.4°F54.7°F+8.8°NCLIMGRID
2017Mar66.1°F61.2°F+4.9°NCLIMGRID
2017Apr71.3°F68.7°F+2.5°NCLIMGRID
2017May74.3°F75.3°F-1.0°NCLIMGRID
2017Jun80.0°F81.1°F-1.2°NCLIMGRID
2017Jul83.2°F82.7°F+0.5°NCLIMGRID
2017Aug82.8°F82.3°F+0.5°NCLIMGRID
2017Sep79.5°F79.3°F+0.2°NCLIMGRID
2017Oct73.3°F70.9°F+2.4°NCLIMGRID
2017Nov65.2°F62.6°F+2.6°NCLIMGRID
2017Dec56.8°F56.0°F+0.8°NCLIMGRID
2018Jan48.8°F52.5°F-3.6°NCLIMGRID
2018Feb67.3°F54.7°F+12.6°NCLIMGRID
2018Mar63.3°F61.2°F+2.1°NCLIMGRID
2018Apr65.7°F68.7°F-3.0°NCLIMGRID
2018May78.8°F75.3°F+3.6°NCLIMGRID
2018Jun83.2°F81.1°F+2.1°NCLIMGRID
2018Jul84.6°F82.7°F+1.9°NCLIMGRID
2018Aug82.9°F82.3°F+0.6°NCLIMGRID
2018Sep82.8°F79.3°F+3.4°NCLIMGRID
2018Oct76.8°F70.9°F+5.9°NCLIMGRID
2018Nov60.5°F62.6°F-2.0°NCLIMGRID
2018Dec58.4°F56.0°F+2.4°NCLIMGRID
2019Jan54.2°F52.5°F+1.7°NCLIMGRID
2019Feb63.6°F54.7°F+8.9°NCLIMGRID
2019Mar61.0°F61.2°F-0.2°NCLIMGRID
2019Apr67.8°F68.7°F-0.9°NCLIMGRID
2019May78.0°F75.3°F+2.7°NCLIMGRID
2019Jun83.4°F81.1°F+2.3°NCLIMGRID
2019Jul83.1°F82.7°F+0.4°NCLIMGRID
2019Aug84.1°F82.3°F+1.7°NCLIMGRID
2019Sep84.1°F79.3°F+4.8°NCLIMGRID
2019Oct75.3°F70.9°F+4.4°NCLIMGRID
2019Nov58.8°F62.6°F-3.8°NCLIMGRID
2019Dec58.7°F56.0°F+2.7°NCLIMGRID
2020Jan57.6°F52.5°F+5.2°NCLIMGRID
2020Feb58.6°F54.7°F+3.9°NCLIMGRID
2020Mar70.5°F61.2°F+9.3°NCLIMGRID
2020Apr70.7°F68.7°F+1.9°NCLIMGRID
2020May76.0°F75.3°F+0.7°NCLIMGRID
2020Jun81.7°F81.1°F+0.6°NCLIMGRID
2020Jul83.5°F82.7°F+0.8°NCLIMGRID
2020Aug83.6°F82.3°F+1.3°NCLIMGRID
2020Sep79.6°F79.3°F+0.3°NCLIMGRID
2020Oct74.0°F70.9°F+3.0°NCLIMGRID
2020Nov67.3°F62.6°F+4.7°NCLIMGRID
2020Dec54.9°F56.0°F-1.1°NCLIMGRID
2021Jan54.8°F52.5°F+2.3°NCLIMGRID
2021Feb53.4°F54.7°F-1.3°NCLIMGRID
2021Mar65.2°F61.2°F+4.0°NCLIMGRID
2021Apr67.0°F68.7°F-1.7°NCLIMGRID
2021May74.7°F75.3°F-0.6°NCLIMGRID
2021Jun81.3°F81.1°F+0.2°NCLIMGRID
2021Jul82.7°F82.7°F-0.1°NCLIMGRID
2021Aug83.8°F82.3°F+1.4°NCLIMGRID
2021Sep79.0°F79.3°F-0.3°NCLIMGRID
2021Oct75.4°F70.9°F+4.4°NCLIMGRID
2021Nov61.0°F62.6°F-1.6°NCLIMGRID
2021Dec64.7°F56.0°F+8.8°NCLIMGRID
2022Jan51.8°F52.5°F-0.7°NCLIMGRID
2022Feb56.2°F54.7°F+1.6°NCLIMGRID
2022Mar61.5°F61.2°F+0.3°NCLIMGRID
2022Apr69.5°F68.7°F+0.8°NCLIMGRID
2022May78.9°F75.3°F+3.6°NCLIMGRID
2022Jun84.5°F81.1°F+3.4°NCLIMGRID
2022Jul83.4°F82.7°F+0.7°NCLIMGRID
2022Aug82.2°F82.3°F-0.1°NCLIMGRID
2022Sep80.2°F79.3°F+0.8°NCLIMGRID
2022Oct70.2°F70.9°F-0.7°NCLIMGRID
2022Nov63.5°F62.6°F+0.9°NCLIMGRID
2022Dec58.9°F56.0°F+3.0°NCLIMGRID
2023Jan60.5°F52.5°F+8.0°NCLIMGRID
2023Feb63.0°F54.7°F+8.3°NCLIMGRID
2023Mar65.9°F61.2°F+4.7°NCLIMGRID
2023Apr69.7°F68.7°F+1.0°NCLIMGRID
2023May77.1°F75.3°F+1.8°NCLIMGRID
2023Jun84.0°F81.1°F+2.9°NCLIMGRID
2023Jul86.1°F82.7°F+3.4°NCLIMGRID
2023Aug88.5°F82.3°F+6.2°NCLIMGRID
2023Sep83.1°F79.3°F+3.8°NCLIMGRID
2023Oct73.3°F70.9°F+2.3°NCLIMGRID
2023Nov62.8°F62.6°F+0.2°NCLIMGRID
2023Dec57.6°F56.0°F+1.6°NCLIMGRID
2024Jan52.7°F52.5°F+0.2°NCLIMGRID
2024Feb60.4°F54.7°F+5.7°NCLIMGRID
2024Mar63.8°F61.2°F+2.6°NCLIMGRID
2024Apr71.0°F68.7°F+2.3°NCLIMGRID
2024May79.7°F75.3°F+4.4°NCLIMGRID
2024Jun83.5°F81.1°F+2.4°NCLIMGRID
2024Jul84.6°F82.7°F+1.9°NCLIMGRID
2024Aug85.9°F82.3°F+3.6°NCLIMGRID
2024Sep80.9°F79.3°F+1.6°NCLIMGRID
2024Oct74.6°F70.9°F+3.7°NCLIMGRID
2024Nov71.1°F62.6°F+8.5°NCLIMGRID
2024Dec58.8°F56.0°F+2.8°NCLIMGRID
2025Jan51.4°F52.5°F-1.0°NCLIMGRID
2025Feb61.9°F54.7°F+7.3°NCLIMGRID
2025Mar65.3°F61.2°F+4.1°NCLIMGRID
2025Apr72.7°F68.7°F+4.0°NCLIMGRID
2025May77.6°F75.3°F+2.3°NCLIMGRID
2025Jun83.2°F81.1°F+2.1°NCLIMGRID
2025Jul84.7°F82.7°F+2.0°NCLIMGRID
2025Aug84.0°F82.3°F+1.7°NCLIMGRID
2025Sep81.5°F79.3°F+2.2°NCLIMGRID
2025Oct75.5°F70.9°F+4.6°NCLIMGRID
2025Nov65.5°F62.6°F+2.9°NCLIMGRID
2025Dec58.6°F56.0°F+2.7°NCLIMGRID
2026Jan55.5°F52.5°F+3.0°NCLIMGRID
2026Feb60.1°F54.7°F+5.4°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)

MonthBaselineYears
January52.5°F26/26
February54.7°F26/26
March61.2°F26/26
April68.7°F26/26
May75.3°F26/26
June81.1°F26/26
July82.7°F26/26
August82.3°F26/26
September79.3°F26/26
October70.9°F26/26
November62.6°F26/26
December56.0°F26/26

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 Port Sulphur, Louisiana getting warmer?

Based on 96+ years of NOAA temperature records, Port Sulphur has changed 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 Port Sulphur?

The warmest year on record in Port Sulphur was 2023, based on average annual temperature anomaly from NOAA station data.

Where does the temperature data for Port Sulphur 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 Port Sulphur's climate profile.

How are the climate visualizations for Port Sulphur created?

Three visualizations are generated from Port Sulphur'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 Port Sulphur's temperature data?

Yes. The interactive data table on this page shows every monthly temperature reading in Port Sulphur's record. You can filter by decade and download the complete dataset as a CSV file for your own analysis.

Wear Port Sulphur's Climate Story

These visualizations are printed on demand using Port Sulphur's actual NOAA data. Every purchase plants a tree.

Shop Port Sulphur Climate Apparel →

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