Climate Change in Willow, Alaska

95+ years of recorded temperature data show Willow is warming.

Based on our analysis of 95 years of temperature data near Willow, AK, this area shows a warming trend of approximately +0.5°F per decade. 10 of the last 10 years recorded above-average temperatures, and 2003 was the warmest year on record at +7.2°F above the historical baseline.

Key Climate Facts

Rate of Change

+0.5°F

per decade

Warmest Year

2003

+7.2°F anomaly

Recent Warm Years

10 / 10

above-average years

Decade Shift

+3.0°F

2020s vs 1930s

Compared to the National Average

Willow is warming 0.3°F/decade faster than the national average.

National: +0.20°F/decade
Willow: +0.50°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 Willow's long-term warming trend.

Temperature anomaly spiral for Willow, Alaska
Climate spiral: monthly temperature anomalies from 95+ years of NOAA records for Willow, AK.

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 Willow, Alaska
Warming stripes: each stripe is one year of average temperature anomaly for Willow, AK.

Temperature Trend

Annual temperature anomalies plotted over time with a linear regression trend line. The slope of +0.50°F per decade quantifies the rate of change.

Temperature trend chart for Willow, Alaska
Linear trend: annual temperature anomalies with trend line for Willow, AK.

Temperature by Decade

1930s
-0.25°F
1940s
+0.30°F
1950s
-0.87°F
1960s
-0.76°F
1970s
-1.03°F
1980s
+1.22°F
1990s
+1.02°F
2000s
+3.28°F
2010s
+3.54°F
2020s
+2.52°F

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

Anomaly Scale

-8.1°F Colder Normal +9.5°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 Willow, AK. Filter by decade or download as CSV.

Data Sources & Audit

Station
TALKEETNA AIRPORT, AK US
Distance
49.4 mi
Coverage
96.9%
Records
1,128
Range
1930-01 – 2026-01
Gap-filled
10 from 2 stations
Full Data Audit 1,138 records
YearMonthTempBaselineAnomalySourceGap
1930Jan4.0°F9.4°F-5.4°USW00026528
1930Feb3.9°F14.9°F-11.0°USW00026528
1930Mar18.1°F22.2°F-4.1°USW00026528
1930Apr33.5°F33.1°F+0.4°USW00026528
1930May45.0°F45.4°F-0.5°USW00026528
1930Jun53.0°F54.8°F-1.8°USW00026528
1930Jul58.3°F58.4°F-0.1°USW00026528
1930Aug55.6°F55.3°F+0.3°USW00026528
1931Aug55.8°F55.3°F+0.5°USW00026528
1931Sep45.1°F46.1°F-0.9°USW00026528
1931Oct32.1°F31.3°F+0.8°USW00026528
1931Nov24.6°F17.3°F+7.3°USW00026528
1931Dec13.9°F12.2°F+1.7°USW00026528
1932Jan1.4°F9.4°F-8.0°USW00026528
1932May40.7°F45.4°F-4.7°USW00026528
1932Jun52.1°F54.8°F-2.7°USW00026528
1932Jul59.0°F58.4°F+0.6°USW00026528
1932Aug53.9°F55.3°F-1.4°USW00026528
1932Sep45.5°F46.1°F-0.6°USW00026528
1932Oct36.8°F31.3°F+5.5°USW00026528
1932Nov11.9°F17.3°F-5.4°USW00026528
1932Dec11.0°F12.2°F-1.2°USW00026528
1933Jan-1.8°F9.4°F-11.2°USW00026528
1933Feb12.2°F14.9°F-2.7°USW00026528
1933Mar21.1°F22.2°F-1.0°USW00026528
1933Apr36.6°F33.1°F+3.4°USW00026528
1933May47.5°F45.4°F+2.1°USW00026528
1933Jun52.7°F54.8°F-2.1°USW00026528
1933Jul59.1°F58.4°F+0.7°USW00026528
1933Aug54.2°F55.3°F-1.1°USW00026528
1933Sep44.7°F46.1°F-1.4°USW00026528
1933Oct27.0°F31.3°F-4.3°USW00026528
1933Nov22.6°F17.3°F+5.2°USW00026528
1933Dec-3.4°F12.2°F-15.6°USW00026528
1934Jan3.7°F9.4°F-5.7°USW00026528
1934Feb27.2°F14.9°F+12.3°USW00026528
1934Mar22.5°F22.2°F+0.3°USW00026528
1934Apr37.4°F33.1°F+4.2°USC00508882
1934May44.7°F45.4°F-0.8°USC00508882
1934Jun55.2°F54.8°F+0.4°USW00026528
1934Jul56.2°F58.4°F-2.2°USW00026528
1934Aug55.6°F55.3°F+0.3°USW00026528
1934Sep47.4°F46.1°F+1.4°USW00026528
1934Oct35.5°F31.3°F+4.2°USW00026528
1934Nov21.7°F17.3°F+4.4°USW00026528
1934Dec16.1°F12.2°F+3.9°USW00026528
1935Jan5.6°F9.4°F-3.8°USW00026528
1935Feb24.5°F14.9°F+9.6°USW00026528
1935Mar18.1°F22.2°F-4.1°USW00026528
1935Apr35.5°F33.1°F+2.4°USW00026528
1935May44.7°F45.4°F-0.7°USW00026528
1935Jun54.1°F54.8°F-0.7°USW00026528
1935Jul58.1°F58.4°F-0.3°USW00026528
1935Aug52.0°F55.3°F-3.3°USW00026528
1935Sep43.5°F46.1°F-2.5°USW00026528
1935Oct29.4°F31.3°F-1.9°USW00026528
1935Nov18.6°F17.3°F+1.2°USW00026528
1935Dec14.0°F12.2°F+1.8°USW00026528
1936Jan13.2°F9.4°F+3.7°USW00026528
1936Feb11.3°F14.9°F-3.6°USW00026528
1936Mar18.0°F22.2°F-4.2°USW00026528
1936Apr33.6°F33.1°F+0.5°USW00026528
1936May44.4°F45.4°F-1.0°USW00026528
1936Jun61.3°F54.8°F+6.5°USW00026528
1936Jul56.9°F58.4°F-1.5°USC00508882
1936Aug57.1°F55.3°F+1.8°USW00026528
1936Sep43.8°F46.1°F-2.3°USW00026528
1936Oct38.3°F31.3°F+6.9°USW00026528
1936Nov30.0°F17.3°F+12.6°USC00508882
1936Dec3.3°F12.2°F-8.9°USW00026528
1937Jan10.7°F9.4°F+1.3°USW00026528
1937Feb4.1°F14.9°F-10.8°USW00026528
1937Mar24.9°F22.2°F+2.7°USC00508882
1937Apr32.9°F33.1°F-0.2°USW00026528
1937May42.5°F45.4°F-3.0°USW00026528
1937Jun55.6°F54.8°F+0.8°USW00026528
1937Jul58.7°F58.4°F+0.3°USW00026528
1937Aug56.1°F55.3°F+0.8°USW00026528
1937Sep47.4°F46.1°F+1.4°USW00026528
1937Oct38.9°F31.3°F+7.5°USW00026528
1937Nov21.1°F17.3°F+3.8°USW00026528
1937Dec9.9°F12.2°F-2.3°USW00026528
1938Jan9.1°F9.4°F-0.3°USW00026528
1938Feb14.8°F14.9°F-0.1°USW00026528
1938Mar22.6°F22.2°F+0.4°USW00026528
1938Apr38.2°F33.1°F+5.0°USW00026528
1938May43.4°F45.4°F-2.0°USW00026528
1938Jun51.6°F54.8°F-3.2°USW00026528
1938Jul56.7°F58.4°F-1.7°USW00026528
1938Aug55.3°F55.3°F+0.0°USW00026528
1938Sep47.6°F46.1°F+1.6°USC00508882
1938Oct38.4°F31.3°F+7.0°USW00026528
1938Nov18.1°F17.3°F+0.8°USW00026528
1938Dec14.1°F12.2°F+1.9°USW00026528
1939Jan7.4°F9.4°F-2.0°USW00026528
1939Feb17.3°F14.9°F+2.4°USW00026528
1939Mar17.9°F22.2°F-4.3°USW00026528
1939Apr32.9°F33.1°F-0.2°USW00026528
1939May43.3°F45.4°F-2.1°USW00026528
1939Jun53.9°F54.8°F-0.9°USW00026528
1939Jul57.4°F58.4°F-1.0°USW00026528
1939Sep45.1°F46.1°F-1.0°USW00026528
1939Oct27.4°F31.3°F-4.0°USW00026528
1939Nov15.9°F17.3°F-1.4°USW00026528
1939Dec16.7°F12.2°F+4.4°USW00026528
1940Jan17.1°F9.4°F+7.7°USW00026528
1940Feb20.6°F14.9°F+5.7°USW00026528
1940Mar24.4°F22.2°F+2.2°USW00026528
1940Apr40.7°F33.1°F+7.6°USW00026528
1940May46.4°F45.4°F+1.0°USW00026528
1940Jun55.7°F54.8°F+0.9°USW00026528
1940Jul58.0°F58.4°F-0.4°USW00026528
1940Aug54.9°F55.3°F-0.4°USW00026528
1940Sep46.0°F46.1°F-0.1°USW00026528
1940Oct34.4°F31.3°F+3.0°USW00026528
1940Nov20.7°F17.3°F+3.3°USW00026528
1940Dec14.6°F12.2°F+2.4°USW00026528
1941Jan13.2°F9.4°F+3.8°USW00026528
1941Feb23.1°F14.9°F+8.2°USW00026528
1941Mar29.9°F22.2°F+7.7°USW00026528
1941Apr39.4°F33.1°F+6.3°USW00026528
1941May45.5°F45.4°F+0.1°USW00026528
1941Jun56.8°F54.8°F+2.0°USW00026528
1941Jul56.7°F58.4°F-1.7°USC00508882
1941Aug58.8°F55.3°F+3.5°USW00026528
1941Sep46.6°F46.1°F+0.6°USW00026528
1941Oct28.7°F31.3°F-2.6°USW00026528
1941Nov13.1°F17.3°F-4.2°USW00026528
1941Dec9.6°F12.2°F-2.6°USW00026528
1942Jan17.2°F9.4°F+7.8°USW00026528
1942Feb26.1°F14.9°F+11.2°USW00026528
1942Mar18.0°F22.2°F-4.2°USW00026528
1942Apr34.1°F33.1°F+0.9°USW00026528
1942May49.5°F45.4°F+4.0°USW00026528
1942Jun55.3°F54.8°F+0.5°USW00026528
1942Jul58.7°F58.4°F+0.3°USW00026528
1942Aug56.3°F55.3°F+1.0°USW00026528
1942Sep50.7°F46.1°F+4.6°USW00026528
1942Oct36.4°F31.3°F+5.1°USW00026528
1942Nov14.7°F17.3°F-2.6°USW00026528
1942Dec2.0°F12.2°F-10.2°USW00026528
1943Jan7.2°F9.4°F-2.2°USW00026528
1943Feb23.1°F14.9°F+8.2°USW00026528
1943Mar20.0°F22.2°F-2.2°USW00026528
1943Apr34.4°F33.1°F+1.3°USW00026528
1943May46.3°F45.4°F+0.9°USW00026528
1943Jun57.0°F54.8°F+2.2°USW00026528
1943Jul56.6°F58.4°F-1.8°USW00026528
1943Aug54.2°F55.3°F-1.1°USW00026528
1943Sep46.7°F46.1°F+0.7°USW00026528
1943Oct36.6°F31.3°F+5.2°USW00026528
1943Nov26.6°F17.3°F+9.2°USW00026528
1943Dec21.3°F12.2°F+9.0°USW00026528
1944Jan14.3°F9.4°F+4.8°USW00026528
1944Feb24.5°F14.9°F+9.6°USW00026528
1944Mar17.5°F22.2°F-4.6°USW00026528
1944Apr30.0°F33.1°F-3.1°USW00026528
1944May44.9°F45.4°F-0.5°USW00026528
1944Jun56.5°F54.8°F+1.7°USW00026528
1944Jul59.1°F58.4°F+0.7°USW00026528
1944Aug54.9°F55.3°F-0.4°USW00026528
1944Sep46.9°F46.1°F+0.9°USW00026528
1944Oct36.3°F31.3°F+5.0°USW00026528
1944Nov22.3°F17.3°F+5.0°USW00026528
1944Dec14.1°F12.2°F+1.8°USW00026528
1945Jan23.0°F9.4°F+13.6°USW00026528
1945Feb18.6°F14.9°F+3.7°USW00026528
1945Mar20.7°F22.2°F-1.5°USW00026528
1945Apr29.8°F33.1°F-3.3°USW00026528
1945May42.2°F45.4°F-3.2°USW00026528
1945Jun53.8°F54.8°F-1.0°USW00026528
1945Jul58.6°F58.4°F+0.2°USW00026528
1945Aug53.9°F55.3°F-1.4°USW00026528
1945Sep46.2°F46.1°F+0.1°USW00026528
1945Oct32.3°F31.3°F+1.0°USW00026528
1945Nov14.5°F17.3°F-2.9°USC00508882
1945Dec11.9°F12.2°F-0.4°USW00026528
1946Jan11.3°F9.4°F+1.9°USW00026528
1946Feb14.3°F14.9°F-0.5°USW00026528
1946Mar10.9°F22.2°F-11.3°USW00026528
1946Apr29.8°F33.1°F-3.4°USW00026528
1946May43.4°F45.4°F-2.0°USW00026528
1946Jun56.6°F54.8°F+1.8°USW00026528
1946Jul59.3°F58.4°F+0.9°USW00026528
1946Aug53.0°F55.3°F-2.3°USW00026528
1946Sep47.3°F46.1°F+1.3°USW00026528
1946Oct34.3°F31.3°F+2.9°USW00026528
1946Nov11.9°F17.3°F-5.5°USW00026528
1946Dec1.0°F12.2°F-11.2°USW00026528
1947Jan-9.7°F9.4°F-19.1°USW00026528
1947Feb19.7°F14.9°F+4.8°USW00026528
1947Mar28.1°F22.2°F+5.9°USW00026528
1947Apr33.0°F33.1°F-0.1°USW00026528
1947May45.4°F45.4°F+0.0°USW00026528
1947Jun53.8°F54.8°F-1.0°USW00026528
1947Jul59.8°F58.4°F+1.4°USW00026528
1947Aug54.1°F55.3°F-1.2°USW00026528
1947Sep45.0°F46.1°F-1.1°USW00026528
1947Oct33.8°F31.3°F+2.5°USW00026528
1947Nov25.6°F17.3°F+8.2°USW00026528
1947Dec20.6°F12.2°F+8.3°USW00026528
1948Jan14.8°F9.4°F+5.4°USW00026528
1948Feb8.1°F14.9°F-6.7°USW00026528
1948Mar13.9°F22.2°F-8.3°USW00026528
1948Apr24.0°F33.1°F-9.1°USW00026528
1948May44.0°F45.4°F-1.5°USW00026528
1948Jun55.7°F54.8°F+0.8°USW00026528
1948Jul55.9°F58.4°F-2.5°USW00026528
1948Aug50.7°F55.3°F-4.6°USW00026528
1948Sep43.6°F46.1°F-2.5°USW00026528
1948Oct33.8°F31.3°F+2.5°USW00026528
1948Nov12.3°F17.3°F-5.1°USW00026528
1948Dec-0.5°F12.2°F-12.7°USW00026528
1949Jan9.0°F9.4°F-0.4°USW00026528
1949Feb1.1°F14.9°F-13.8°USW00026528
1949Mar25.5°F22.2°F+3.3°USW00026528
1949Apr27.9°F33.1°F-5.2°USW00026528
1949May41.2°F45.4°F-4.2°USW00026528
1949Jun50.3°F54.8°F-4.6°USW00026528
1949Jul56.4°F58.4°F-2.0°USW00026528
1949Aug53.5°F55.3°F-1.8°USW00026528
1949Sep47.6°F46.1°F+1.6°USW00026528
1949Oct34.6°F31.3°F+3.3°USW00026528
1949Nov23.4°F17.3°F+6.0°USW00026528
1949Dec1.0°F12.2°F-11.2°USW00026528
1950Jan-1.0°F9.4°F-10.5°USW00026528
1950Feb9.0°F14.9°F-5.8°USW00026528
1950Mar26.7°F22.2°F+4.5°USW00026528
1950Apr35.1°F33.1°F+1.9°USW00026528
1950May45.0°F45.4°F-0.4°USW00026528
1950Jun53.3°F54.8°F-1.5°USW00026528
1950Jul56.7°F58.4°F-1.7°USW00026528
1950Aug57.7°F55.3°F+2.4°USW00026528
1950Sep46.8°F46.1°F+0.8°USW00026528
1950Oct30.3°F31.3°F-1.1°USW00026528
1950Nov7.9°F17.3°F-9.5°USW00026528
1950Dec11.1°F12.2°F-1.2°USW00026528
1951Jan5.2°F9.4°F-4.2°USW00026528
1951Feb8.3°F14.9°F-6.6°USW00026528
1951Mar9.2°F22.2°F-13.0°USW00026528
1951Apr35.7°F33.1°F+2.6°USW00026528
1951May46.4°F45.4°F+1.0°USW00026528
1951Jun53.1°F54.8°F-1.7°USW00026528
1951Jul60.3°F58.4°F+1.9°USW00026528
1951Aug54.4°F55.3°F-0.9°USW00026528
1951Sep47.1°F46.1°F+1.1°USW00026528
1951Oct29.8°F31.3°F-1.5°USW00026528
1951Nov21.3°F17.3°F+4.0°USW00026528
1951Dec3.8°F12.2°F-8.4°USW00026528
1952Jan1.9°F9.4°F-7.5°USW00026528
1952Feb17.5°F14.9°F+2.7°USW00026528
1952Mar17.2°F22.2°F-5.0°USW00026528
1952Apr30.7°F33.1°F-2.4°USW00026528
1952May39.1°F45.4°F-6.3°USW00026528
1952Jun53.4°F54.8°F-1.4°USW00026528
1952Jul57.2°F58.4°F-1.2°USW00026528
1952Aug53.5°F55.3°F-1.8°USW00026528
1952Sep44.5°F46.1°F-1.6°USW00026528
1952Oct36.4°F31.3°F+5.1°USW00026528
1952Nov28.7°F17.3°F+11.4°USW00026528
1952Dec16.2°F12.2°F+4.0°USW00026528
1953Jan6.4°F9.4°F-3.0°USW00026528
1953Feb18.3°F14.9°F+3.4°USW00026528
1953Mar17.6°F22.2°F-4.6°USW00026528
1953Apr36.1°F33.1°F+3.0°USW00026528
1953May46.7°F45.4°F+1.3°USW00026528
1953Jun59.7°F54.8°F+4.9°USW00026528
1953Jul60.7°F58.4°F+2.3°USW00026528
1953Aug54.5°F55.3°F-0.8°USW00026528
1953Sep47.0°F46.1°F+1.0°USW00026528
1953Oct31.4°F31.3°F+0.1°USW00026528
1953Nov19.8°F17.3°F+2.5°USW00026528
1953Dec14.9°F12.2°F+2.7°USW00026528
1954Jan6.3°F9.4°F-3.2°USW00026528
1954Feb3.1°F14.9°F-11.8°USW00026528
1954Mar20.2°F22.2°F-1.9°USW00026528
1954Apr31.7°F33.1°F-1.4°USW00026528
1954May47.3°F45.4°F+1.9°USW00026528
1954Jun55.9°F54.8°F+1.1°USW00026528
1954Jul56.7°F58.4°F-1.7°USW00026528
1954Aug55.1°F55.3°F-0.2°USW00026528
1954Sep47.4°F46.1°F+1.3°USW00026528
1954Oct37.1°F31.3°F+5.7°USW00026528
1954Nov24.1°F17.3°F+6.7°USW00026528
1954Dec1.1°F12.2°F-11.1°USW00026528
1955Jan16.6°F9.4°F+7.2°USW00026528
1955Feb11.0°F14.9°F-3.9°USW00026528
1955Mar19.1°F22.2°F-3.0°USW00026528
1955Apr27.0°F33.1°F-6.1°USW00026528
1955May41.7°F45.4°F-3.7°USW00026528
1955Jun50.6°F54.8°F-4.2°USW00026528
1955Jul58.7°F58.4°F+0.3°USW00026528
1955Aug52.4°F55.3°F-2.9°USW00026528
1955Sep45.1°F46.1°F-0.9°USW00026528
1955Oct29.8°F31.3°F-1.5°USW00026528
1955Nov5.2°F17.3°F-12.2°USW00026528
1955Dec3.8°F12.2°F-8.4°USW00026528
1956Jan7.7°F9.4°F-1.8°USW00026528
1956Feb6.9°F14.9°F-8.0°USW00026528
1956Mar16.7°F22.2°F-5.5°USW00026528
1956Apr32.9°F33.1°F-0.2°USW00026528
1956May43.9°F45.4°F-1.5°USW00026528
1956Jun53.2°F54.8°F-1.7°USW00026528
1956Jul57.9°F58.4°F-0.5°USW00026528
1956Aug55.4°F55.3°F+0.1°USW00026528
1956Sep44.3°F46.1°F-1.8°USW00026528
1956Oct24.9°F31.3°F-6.4°USW00026528
1956Nov10.1°F17.3°F-7.2°USW00026528
1956Dec-1.3°F12.2°F-13.6°USW00026528
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2011Oct35.2°F31.3°F+3.8°USW00026528
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2012Apr37.8°F33.1°F+4.7°USW00026528
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2012Jun55.5°F54.8°F+0.7°USW00026528
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2012Nov18.5°F17.3°F+1.2°USW00026528
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2013Mar20.3°F22.2°F-1.9°USW00026528
2013Apr25.8°F33.1°F-7.3°USW00026528
2013May44.2°F45.4°F-1.2°USW00026528
2013Jun60.6°F54.8°F+5.8°USW00026528
2013Jul62.1°F58.4°F+3.7°USW00026528
2013Aug57.1°F55.3°F+1.8°USW00026528
2013Sep47.3°F46.1°F+1.3°USW00026528
2013Oct39.1°F31.3°F+7.8°USW00026528
2013Nov16.7°F17.3°F-0.7°USW00026528
2013Dec11.7°F12.2°F-0.6°USW00026528
2014Jan28.8°F9.4°F+19.4°USW00026528
2014Feb16.8°F14.9°F+1.9°USW00026528
2014Mar24.3°F22.2°F+2.1°USW00026528
2014Apr35.7°F33.1°F+2.6°USW00026528
2014May51.1°F45.4°F+5.6°USW00026528
2014Jun54.0°F54.8°F-0.8°USW00026528
2014Jul59.4°F58.4°F+1.0°USW00026528
2014Aug56.2°F55.3°F+0.9°USW00026528
2014Sep48.9°F46.1°F+2.8°USW00026528
2014Oct31.7°F31.3°F+0.3°USW00026528
2014Nov28.7°F17.3°F+11.3°USW00026528
2014Dec26.5°F12.2°F+14.2°USW00026528
2015Jan16.4°F9.4°F+7.0°USW00026528
2015Feb23.0°F14.9°F+8.2°USW00026528
2015Mar26.5°F22.2°F+4.3°USW00026528
2015Apr38.8°F33.1°F+5.7°USW00026528
2015May50.9°F45.4°F+5.5°USW00026528
2015Jun58.9°F54.8°F+4.1°USW00026528
2015Jul59.7°F58.4°F+1.3°USW00026528
2015Aug56.2°F55.3°F+0.9°USW00026528
2015Sep44.3°F46.1°F-1.7°USW00026528
2015Oct39.9°F31.3°F+8.5°USW00026528
2015Nov22.8°F17.3°F+5.5°USW00026528
2015Dec17.4°F12.2°F+5.2°USW00026528
2016Jan25.2°F9.4°F+15.8°USW00026528
2016Feb29.1°F14.9°F+14.2°USW00026528
2016Mar31.2°F22.2°F+9.0°USW00026528
2016Apr42.5°F33.1°F+9.4°USW00026528
2016May52.1°F45.4°F+6.6°USW00026528
2016Jun58.0°F54.8°F+3.2°USW00026528
2016Jul62.3°F58.4°F+3.9°USW00026528
2016Aug59.5°F55.3°F+4.2°USW00026528
2016Sep48.7°F46.1°F+2.7°USW00026528
2016Oct35.2°F31.3°F+3.9°USW00026528
2016Nov23.5°F17.3°F+6.1°USW00026528
2016Dec12.9°F12.2°F+0.6°USW00026528
2017Jan8.5°F9.4°F-0.9°USW00026528
2017Feb17.2°F14.9°F+2.4°USW00026528
2017Mar18.5°F22.2°F-3.7°USW00026528
2017Apr40.9°F33.1°F+7.7°USW00026528
2017May48.0°F45.4°F+2.6°USW00026528
2017Jun56.8°F54.8°F+2.0°USW00026528
2017Jul61.6°F58.4°F+3.2°USW00026528
2017Aug56.7°F55.3°F+1.4°USW00026528
2017Sep49.5°F46.1°F+3.4°USW00026528
2017Oct35.5°F31.3°F+4.1°USW00026528
2017Nov17.5°F17.3°F+0.1°USW00026528
2017Dec22.2°F12.2°F+10.0°USW00026528
2018Jan15.4°F9.4°F+6.0°USW00026528
2018Feb13.3°F14.9°F-1.6°USW00026528
2018Mar23.7°F22.2°F+1.5°USW00026528
2018Apr36.4°F33.1°F+3.2°USW00026528
2018May45.8°F45.4°F+0.4°USW00026528
2018Jun55.5°F54.8°F+0.7°USW00026528
2018Jul61.0°F58.4°F+2.6°USW00026528
2018Aug56.0°F55.3°F+0.7°USW00026528
2018Sep50.9°F46.1°F+4.8°USW00026528
2018Oct40.9°F31.3°F+9.6°USW00026528
2018Nov28.7°F17.3°F+11.3°USW00026528
2018Dec20.0°F12.2°F+7.8°USW00026528
2019Jan14.2°F9.4°F+4.8°USW00026528
2019Feb14.8°F14.9°F-0.1°USW00026528
2019Mar33.7°F22.2°F+11.5°USW00026528
2019Apr37.7°F33.1°F+4.6°USW00026528
2019May48.6°F45.4°F+3.2°USW00026528
2019Jun61.5°F54.8°F+6.7°USW00026528
2019Jul65.2°F58.4°F+6.8°USW00026528
2019Aug58.9°F55.3°F+3.7°USW00026528
2019Sep50.1°F46.1°F+4.1°USW00026528
2019Oct38.0°F31.3°F+6.7°USW00026528
2019Nov32.1°F17.3°F+14.8°USW00026528
2019Dec20.2°F12.2°F+8.0°USW00026528
2020Jan-0.9°F9.4°F-10.4°USW00026528
2020Feb17.0°F14.9°F+2.1°USW00026528
2020Mar19.3°F22.2°F-2.9°USW00026528
2020Apr34.8°F33.1°F+1.6°USW00026528
2020May50.8°F45.4°F+5.4°USW00026528
2020Jun56.2°F54.8°F+1.4°USW00026528
2020Jul61.7°F58.4°F+3.3°USW00026528
2020Aug58.7°F55.3°F+3.4°USW00026528
2020Sep49.4°F46.1°F+3.3°USW00026528
2020Oct34.9°F31.3°F+3.6°USW00026528
2020Nov18.1°F17.3°F+0.8°USW00026528
2020Dec19.8°F12.2°F+7.6°USW00026528
2021Jan19.9°F9.4°F+10.4°USW00026528
2021Feb11.3°F14.9°F-3.6°USW00026528
2021Mar15.6°F22.2°F-6.6°USW00026528
2021Apr33.3°F33.1°F+0.1°USW00026528
2021May48.4°F45.4°F+3.0°USW00026528
2021Jun57.8°F54.8°F+3.0°USW00026528
2021Jul59.8°F58.4°F+1.4°USW00026528
2021Aug56.5°F55.3°F+1.2°USW00026528
2021Sep45.6°F46.1°F-0.4°USW00026528
2021Oct34.8°F31.3°F+3.5°USW00026528
2021Nov11.6°F17.3°F-5.8°USW00026528
2021Dec11.7°F12.2°F-0.5°USW00026528
2022Jan16.5°F9.4°F+7.1°USW00026528
2022Feb25.1°F14.9°F+10.2°USW00026528
2022Mar30.9°F22.2°F+8.7°USW00026528
2022Apr35.8°F33.1°F+2.6°USW00026528
2022May48.7°F45.4°F+3.3°USW00026528
2022Jun60.4°F54.8°F+5.6°USW00026528
2022Jul58.6°F58.4°F+0.2°USW00026528
2022Aug55.6°F55.3°F+0.3°USW00026528
2022Sep47.7°F46.1°F+1.7°USW00026528
2022Oct34.4°F31.3°F+3.0°USW00026528
2022Nov20.1°F17.3°F+2.8°USW00026528
2022Dec12.4°F12.2°F+0.2°USW00026528
2023Jan21.5°F9.4°F+12.1°USW00026528
2023Feb15.0°F14.9°F+0.1°USW00026528
2023Mar23.4°F22.2°F+1.2°USW00026528
2023Apr31.1°F33.1°F-2.0°USW00026528
2023May46.1°F45.4°F+0.7°USW00026528
2023Jun54.5°F54.8°F-0.3°USW00026528
2023Jul60.2°F58.4°F+1.8°USW00026528
2023Aug57.8°F55.3°F+2.5°USW00026528
2023Sep46.2°F46.1°F+0.2°USW00026528
2023Oct34.6°F31.3°F+3.2°USW00026528
2023Nov26.9°F17.3°F+9.5°USW00026528
2023Dec11.1°F12.2°F-1.1°USW00026528
2024Jan10.8°F9.4°F+1.4°USW00026528
2024Feb18.6°F14.9°F+3.8°USW00026528
2024Mar28.6°F22.2°F+6.4°USW00026528
2024Apr36.1°F33.1°F+3.0°USW00026528
2024May46.8°F45.4°F+1.4°USW00026528
2024Jun58.6°F54.8°F+3.8°USW00026528
2024Jul57.7°F58.4°F-0.7°USW00026528
2024Aug54.5°F55.3°F-0.8°USW00026528
2024Sep49.5°F46.1°F+3.4°USW00026528
2024Oct34.9°F31.3°F+3.5°USW00026528
2024Nov18.2°F17.3°F+0.9°USW00026528
2024Dec25.4°F12.2°F+13.2°USW00026528
2025Jan23.2°F9.4°F+13.8°USW00026528
2025Feb18.7°F14.9°F+3.9°USW00026528
2025Mar30.4°F22.2°F+8.2°USW00026528
2025Apr38.3°F33.1°F+5.2°USW00026528
2025May46.7°F45.4°F+1.3°USW00026528
2025Jun54.7°F54.8°F-0.1°USW00026528
2025Jul60.0°F58.4°F+1.6°USW00026528
2025Aug55.6°F55.3°F+0.3°USW00026528
2025Sep49.6°F46.1°F+3.6°USW00026528
2025Oct37.8°F31.3°F+6.5°USW00026528
2025Nov19.6°F17.3°F+2.2°USW00026528
2025Dec10.8°F12.2°F-1.4°USW00026528
2026Jan10.3°F9.4°F+0.8°USW00026528

Showing 1,138 of 1,138 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).

36

Initial gaps

10

Filled

26

Unfillable

Fill stations: SUSITNA, AK US, WHITES CROSSING, AK 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: 1966 – 1991 (100% coverage)

MonthBaselineYears
January9.4°F26/26
February14.9°F26/26
March22.2°F26/26
April33.1°F26/26
May45.4°F26/26
June54.8°F26/26
July58.4°F26/26
August55.3°F26/26
September46.1°F26/26
October31.3°F26/26
November17.3°F26/26
December12.2°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

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 Willow, Alaska getting warmer?

Based on 95+ years of NOAA temperature records, Willow has warmed at a rate of approximately 0.50°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 Willow?

The warmest year on record in Willow was 2003, based on average annual temperature anomaly from NOAA station data.

Where does the temperature data for Willow come from?

Data comes from the TALKEETNA AIRPORT, AK US weather station, part of NOAA's Global Historical Climatology Network. This station has recorded 95+ years of temperature observations used to build Willow's climate profile.

How are the climate visualizations for Willow created?

Three visualizations are generated from Willow'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 Willow's temperature data?

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

Wear Willow's Climate Story

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

Shop Willow Climate Apparel →

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