Climate Change in Anchorage, Alaska

74+ years of recorded temperature data show Anchorage is warming.

Based on our analysis of 74 years of temperature data near Anchorage, AK, this area shows a warming trend of approximately +0.6°F per decade. 8 of the last 10 years recorded above-average temperatures, and 2019 was the warmest year on record at +5.4°F above the historical baseline.

Key Climate Facts

Rate of Change

+0.6°F

per decade

Warmest Year

2019

+5.5°F anomaly

Recent Warm Years

8 / 10

above-average years

Decade Shift

+3.3°F

2020s vs 1950s

Compared to the National Average

Anchorage is warming 0.4°F/decade faster than the national average.

National: +0.20°F/decade
Anchorage: +0.61°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 Anchorage's long-term warming trend.

Temperature anomaly spiral for Anchorage, Alaska
Climate spiral: monthly temperature anomalies from 74+ years of NOAA records for Anchorage, 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 Anchorage, Alaska
Warming stripes: each stripe is one year of average temperature anomaly for Anchorage, AK.

Temperature Trend

Annual temperature anomalies plotted over time with a linear regression trend line. The slope of +0.61°F per decade quantifies the rate of change.

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

Temperature by Decade

1950s
-2.69°F
1960s
-1.76°F
1970s
-1.46°F
1980s
-0.19°F
1990s
-0.69°F
2000s
+0.31°F
2010s
+1.90°F
2020s
+0.52°F

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

Anomaly Scale

-8.8°F Colder Normal +7.0°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 Anchorage, AK. Filter by decade or download as CSV.

Data Sources & Audit

Station
ANCHORAGE TED STEVENS INTERNATIONAL AIRPORT, AK US
Distance
6.5 mi
Coverage
97.7%
Records
879
Range
1952-01 – 2026-01
Gap-filled
10 from 1 station
Full Data Audit 889 records
YearMonthTempBaselineAnomalySourceGap
1952Jan3.9°F18.5°F-14.6°USW00026409
1952Feb18.7°F20.2°F-1.5°USW00026409
1952Mar22.8°F27.3°F-4.4°USW00026409
1952Apr33.2°F37.0°F-3.7°USW00026409
1952May42.1°F47.6°F-5.5°USW00026409
1952Jun52.3°F55.3°F-3.0°USW00026451
1952Jul56.8°F58.8°F-2.0°USW00026451
1952Aug55.8°F56.8°F-1.0°USW00026451
1952Sep46.4°F48.7°F-2.3°USW00026409
1952Oct38.0°F34.7°F+3.4°USW00026409
1952Nov31.8°F22.7°F+9.0°USW00026451
1952Dec17.9°F17.8°F+0.0°USW00026409
1953Jan6.9°F18.5°F-11.6°USW00026409
1953Feb20.5°F20.2°F+0.3°USW00026409
1953Mar19.1°F27.3°F-8.2°USW00026451
1953Apr35.4°F37.0°F-1.6°USW00026451
1953May45.1°F47.6°F-2.5°USW00026451
1953Jun57.6°F55.3°F+2.3°USW00026451
1953Jul59.6°F58.8°F+0.8°USW00026451
1953Aug55.2°F56.8°F-1.6°USW00026451
1953Sep45.5°F48.7°F-3.2°USW00026451
1953Oct33.6°F34.7°F-1.1°USW00026451
1953Nov20.6°F22.7°F-2.1°USW00026451
1953Dec17.9°F17.8°F+0.1°USW00026451
1954Jan9.8°F18.5°F-8.7°USW00026451
1954Feb6.6°F20.2°F-13.6°USW00026451
1954Mar22.4°F27.3°F-4.9°USW00026451
1954Apr33.3°F37.0°F-3.7°USW00026451
1954May48.4°F47.6°F+0.8°USW00026451
1954Jun54.7°F55.3°F-0.7°USW00026451
1954Jul57.8°F58.8°F-0.9°USW00026451
1954Aug56.1°F56.8°F-0.7°USW00026451
1954Sep48.5°F48.7°F-0.2°USW00026451
1954Oct39.8°F34.7°F+5.1°USW00026451
1954Nov27.6°F22.7°F+4.9°USW00026451
1954Dec6.0°F17.8°F-11.8°USW00026451
1955Jan18.2°F18.5°F-0.3°USW00026451
1955Feb15.4°F20.2°F-4.9°USW00026451
1955Mar23.1°F27.3°F-4.2°USW00026451
1955Apr31.0°F37.0°F-5.9°USW00026451
1955May43.9°F47.6°F-3.7°USW00026451
1955Jun51.2°F55.3°F-4.1°USW00026451
1955Jul57.5°F58.8°F-1.3°USW00026451
1955Aug54.4°F56.8°F-2.4°USW00026451
1955Sep46.3°F48.7°F-2.4°USW00026451
1955Oct31.5°F34.7°F-3.1°USW00026451
1955Nov9.4°F22.7°F-13.3°USW00026451
1955Dec8.1°F17.8°F-9.7°USW00026451
1956Jan5.1°F18.5°F-13.4°USW00026451
1956Feb10.2°F20.2°F-10.0°USW00026451
1956Mar19.5°F27.3°F-7.7°USW00026451
1956Apr34.6°F37.0°F-2.3°USW00026451
1956May44.0°F47.6°F-3.7°USW00026451
1956Jun52.4°F55.3°F-2.9°USW00026451
1956Jul56.3°F58.8°F-2.5°USW00026451
1956Aug56.0°F56.8°F-0.8°USW00026451
1956Sep46.1°F48.7°F-2.6°USW00026451
1956Oct28.4°F34.7°F-6.3°USW00026451
1956Nov16.5°F22.7°F-6.2°USW00026451
1956Dec4.3°F17.8°F-13.6°USW00026451
1957Jan15.0°F18.5°F-3.5°USW00026451
1957Feb13.5°F20.2°F-6.7°USW00026451
1957Mar28.7°F27.3°F+1.4°USW00026451
1957Apr37.0°F37.0°F+0.0°USW00026451
1957May48.6°F47.6°F+0.9°USW00026451
1957Jun58.0°F55.3°F+2.7°USW00026451
1957Jul58.1°F58.8°F-0.7°USW00026451
1957Aug58.5°F56.8°F+1.7°USW00026451
1957Sep49.9°F48.7°F+1.2°USW00026451
1957Oct38.1°F34.7°F+3.4°USW00026451
1957Nov33.0°F22.7°F+10.2°USW00026451
1957Dec9.4°F17.8°F-8.5°USW00026451
1958Jan18.5°F18.5°F+0.0°USW00026451
1958Feb19.1°F20.2°F-1.1°USW00026451
1958Mar28.8°F27.3°F+1.6°USW00026451
1958Apr38.8°F37.0°F+1.8°USW00026451
1958May47.5°F47.6°F-0.1°USW00026451
1958Jun55.0°F55.3°F-0.3°USW00026451
1958Jul56.4°F58.8°F-2.4°USW00026451
1958Aug55.4°F56.8°F-1.4°USW00026451
1958Sep46.4°F48.7°F-2.3°USW00026451
1958Oct29.5°F34.7°F-5.2°USW00026451
1958Nov19.5°F22.7°F-3.3°USW00026451
1958Dec15.4°F17.8°F-2.4°USW00026451
1959Jan10.1°F18.5°F-8.4°USW00026451
1959Feb20.8°F20.2°F+0.6°USW00026451
1959Mar14.0°F27.3°F-13.3°USW00026451
1959Apr33.7°F37.0°F-3.3°USW00026451
1959May47.6°F47.6°F+0.0°USW00026451
1959Jun56.6°F55.3°F+1.2°USW00026451
1959Jul55.7°F58.8°F-3.1°USW00026451
1959Aug55.8°F56.8°F-1.0°USW00026451
1959Sep47.6°F48.7°F-1.1°USW00026451
1959Oct32.5°F34.7°F-2.1°USW00026451
1959Nov23.3°F22.7°F+0.6°USW00026451
1959Dec18.0°F17.8°F+0.2°USW00026451
1960Jan17.0°F18.5°F-1.5°USW00026451
1960Feb22.7°F20.2°F+2.5°USW00026451
1960Mar20.9°F27.3°F-6.3°USW00026451
1960Apr34.1°F37.0°F-2.9°USW00026451
1960May49.1°F47.6°F+1.5°USW00026451
1960Jun55.1°F55.3°F-0.3°USW00026451
1960Jul57.6°F58.8°F-1.2°USW00026451
1960Aug55.2°F56.8°F-1.6°USW00026451
1960Sep47.0°F48.7°F-1.7°USW00026451
1960Oct37.0°F34.7°F+2.3°USW00026451
1960Nov22.5°F22.7°F-0.2°USW00026451
1960Dec25.3°F17.8°F+7.4°USW00026451
1961Jan20.9°F18.5°F+2.4°USW00026451
1961Feb17.8°F20.2°F-2.4°USW00026451
1961Mar16.3°F27.3°F-11.0°USW00026451
1961Apr36.0°F37.0°F-1.0°USW00026451
1961May47.8°F47.6°F+0.2°USW00026451
1961Jun54.9°F55.3°F-0.4°USW00026451
1961Jul57.7°F58.8°F-1.1°USW00026451
1961Aug54.5°F56.8°F-2.3°USW00026451
1961Sep48.5°F48.7°F-0.2°USW00026451
1961Oct28.9°F34.7°F-5.8°USW00026451
1961Nov16.4°F22.7°F-6.3°USW00026451
1961Dec4.2°F17.8°F-13.7°USW00026451
1962Jan13.4°F18.5°F-5.1°USW00026451
1962Feb19.5°F20.2°F-0.7°USW00026451
1962Mar19.9°F27.3°F-7.4°USW00026451
1962Apr36.8°F37.0°F-0.1°USW00026451
1962May44.7°F47.6°F-2.9°USW00026451
1962Jun53.5°F55.3°F-1.9°USW00026451
1962Jul58.4°F58.8°F-0.4°USW00026451
1962Aug56.8°F56.8°F+0.0°USW00026451
1962Sep45.6°F48.7°F-3.1°USW00026451
1962Oct37.7°F34.7°F+3.1°USW00026451
1962Nov22.3°F22.7°F-0.5°USW00026451
1962Dec16.5°F17.8°F-1.3°USW00026451
1963Jan19.2°F18.5°F+0.7°USW00026451
1963Feb23.4°F20.2°F+3.2°USW00026451
1963Mar24.0°F27.3°F-3.3°USW00026451
1963Apr31.9°F37.0°F-5.1°USW00026451
1963May46.8°F47.6°F-0.8°USW00026451
1963Jun51.6°F55.3°F-3.8°USW00026451
1963Jul58.6°F58.8°F-0.2°USW00026451
1963Aug56.9°F56.8°F+0.2°USW00026451
1963Sep51.9°F48.7°F+3.2°USW00026451
1963Oct36.8°F34.7°F+2.1°USW00026451
1963Nov12.1°F22.7°F-10.6°USW00026451
1963Dec24.8°F17.8°F+6.9°USW00026451
1964Jan14.0°F18.5°F-4.5°USW00026451
1964Feb20.1°F20.2°F-0.1°USW00026451
1964Mar17.2°F27.3°F-10.0°USW00026451
1964Apr33.6°F37.0°F-3.3°USW00026451
1964May41.1°F47.6°F-6.5°USW00026451
1964Jun55.9°F55.3°F+0.6°USW00026451
1964Jul57.1°F58.8°F-1.7°USW00026451
1964Aug54.6°F56.8°F-2.2°USW00026451
1964Sep48.6°F48.7°F-0.1°USW00026451
1964Oct35.0°F34.7°F+0.3°USW00026451
1964Nov21.3°F22.7°F-1.5°USW00026451
1964Dec1.0°F17.8°F-16.8°USW00026451
1965Jan10.0°F18.5°F-8.5°USW00026451
1965Feb10.3°F20.2°F-9.9°USW00026451
1965Mar36.5°F27.3°F+9.2°USW00026451
1965Apr39.7°F37.0°F+2.7°USW00026451
1965May45.4°F47.6°F-2.2°USW00026451
1965Jun52.8°F55.3°F-2.5°USW00026451
1965Jul59.0°F58.8°F+0.2°USW00026451
1965Aug56.3°F56.8°F-0.5°USW00026451
1965Sep53.6°F48.7°F+4.9°USW00026451
1965Oct30.7°F34.7°F-4.0°USW00026451
1965Nov20.5°F22.7°F-2.2°USW00026451
1965Dec13.1°F17.8°F-4.7°USW00026451
1966Jan9.6°F18.5°F-8.9°USW00026451
1966Feb14.7°F20.2°F-5.5°USW00026451
1966Mar16.6°F27.3°F-10.6°USW00026451
1966Apr35.3°F37.0°F-1.7°USW00026451
1966May44.1°F47.6°F-3.5°USW00026451
1966Jun55.3°F55.3°F+0.0°USW00026451
1966Jul57.8°F58.8°F-0.9°USW00026451
1966Aug54.4°F56.8°F-2.4°USW00026451
1966Sep46.3°F48.7°F-2.4°USW00026451
1966Oct32.3°F34.7°F-2.4°USW00026451
1966Nov17.5°F22.7°F-5.2°USW00026451
1966Dec10.8°F17.8°F-7.0°USW00026451
1967Jan7.1°F18.5°F-11.4°USW00026451
1967Feb14.3°F20.2°F-5.9°USW00026451
1967Mar23.1°F27.3°F-4.1°USW00026451
1967Apr35.1°F37.0°F-1.9°USW00026451
1967May47.1°F47.6°F-0.5°USW00026451
1967Jun56.1°F55.3°F+0.8°USW00026451
1967Jul59.3°F58.8°F+0.5°USW00026451
1967Aug58.3°F56.8°F+1.5°USW00026451
1967Sep48.0°F48.7°F-0.7°USW00026451
1967Oct35.7°F34.7°F+1.0°USW00026451
1967Nov30.0°F22.7°F+7.3°USW00026451
1967Dec16.0°F17.8°F-1.9°USW00026451
1968Jan12.4°F18.5°F-6.1°USW00026451
1968Feb23.1°F20.2°F+2.9°USW00026451
1968Mar28.4°F27.3°F+1.1°USW00026451
1968Apr35.0°F37.0°F-2.0°USW00026451
1968May48.2°F47.6°F+0.6°USW00026451
1968Jun54.7°F55.3°F-0.7°USW00026451
1968Jul59.9°F58.8°F+1.1°USW00026451
1968Aug58.2°F56.8°F+1.4°USW00026451
1968Sep47.1°F48.7°F-1.6°USW00026451
1968Oct33.1°F34.7°F-1.6°USW00026451
1968Nov22.0°F22.7°F-0.7°USW00026451
1968Dec6.3°F17.8°F-11.6°USW00026451
1969Jan4.6°F18.5°F-13.9°USW00026451
1969Feb17.9°F20.2°F-2.3°USW00026451
1969Mar28.5°F27.3°F+1.3°USW00026451
1969Apr39.4°F37.0°F+2.5°USW00026451
1969May47.7°F47.6°F+0.1°USW00026451
1969Jun57.7°F55.3°F+2.3°USW00026451
1969Jul59.3°F58.8°F+0.5°USW00026451
1969Aug54.2°F56.8°F-2.6°USW00026451
1969Sep48.9°F48.7°F+0.2°USW00026451
1969Oct41.1°F34.7°F+6.5°USW00026451
1969Nov23.6°F22.7°F+0.9°USW00026451
1969Dec28.4°F17.8°F+10.5°USW00026451
1970Jan9.2°F18.5°F-9.3°USW00026451
1970Feb29.6°F20.2°F+9.4°USW00026451
1970Mar35.4°F27.3°F+8.1°USW00026451
1970Apr36.4°F37.0°F-0.6°USW00026451
1970May48.1°F47.6°F+0.5°USW00026451
1970Jun54.8°F55.3°F-0.6°USW00026451
1970Jul57.1°F58.8°F-1.7°USW00026451
1970Aug54.6°F56.8°F-2.2°USW00026451
1970Sep46.4°F48.7°F-2.3°USW00026451
1970Oct32.5°F34.7°F-2.2°USW00026451
1970Nov24.9°F22.7°F+2.1°USW00026451
1970Dec14.9°F17.8°F-2.9°USW00026451
1971Jan2.7°F18.5°F-15.8°USW00026451
1971Feb20.6°F20.2°F+0.4°USW00026451
1971Mar14.1°F27.3°F-13.1°USW00026451
1971Apr33.4°F37.0°F-3.6°USW00026451
1971May41.6°F47.6°F-6.0°USW00026451
1971Jun51.1°F55.3°F-4.2°USW00026451
1971Jul55.4°F58.8°F-3.4°USW00026451
1971Aug55.0°F56.8°F-1.8°USW00026451
1971Sep46.0°F48.7°F-2.7°USW00026451
1971Oct32.3°F34.7°F-2.4°USW00026451
1971Nov18.2°F22.7°F-4.5°USW00026451
1971Dec16.2°F17.8°F-1.7°USW00026451
1972Jan6.3°F18.5°F-12.2°USW00026451
1972Feb13.5°F20.2°F-6.7°USW00026451
1972Mar15.7°F27.3°F-11.6°USW00026451
1972Apr26.8°F37.0°F-10.2°USW00026451
1972May43.2°F47.6°F-4.4°USW00026451
1972Jun51.9°F55.3°F-3.4°USW00026451
1972Jul58.9°F58.8°F+0.1°USW00026451
1972Aug56.6°F56.8°F-0.2°USW00026451
1972Sep44.5°F48.7°F-4.2°USW00026451
1972Oct31.7°F34.7°F-3.0°USW00026451
1972Nov21.2°F22.7°F-1.5°USW00026451
1972Dec12.3°F17.8°F-5.5°USW00026451
1973Jan2.9°F18.5°F-15.6°USW00026451
1973Feb13.1°F20.2°F-7.1°USW00026451
1973Mar24.2°F27.3°F-3.1°USW00026451
1973Apr35.8°F37.0°F-1.1°USW00026451
1973May43.6°F47.6°F-4.0°USW00026451
1973Jun51.4°F55.3°F-4.0°USW00026451
1973Jul57.7°F58.8°F-1.1°USW00026451
1973Aug53.7°F56.8°F-3.1°USW00026451
1973Sep45.7°F48.7°F-3.0°USW00026451
1973Oct32.1°F34.7°F-2.5°USW00026451
1973Nov13.6°F22.7°F-9.2°USW00026451
1973Dec18.3°F17.8°F+0.5°USW00026451
1974Jan6.8°F18.5°F-11.7°USW00026451
1974Feb14.1°F20.2°F-6.1°USW00026451
1974Mar23.3°F27.3°F-4.0°USW00026451
1974Apr37.9°F37.0°F+0.9°USW00026451
1974May47.8°F47.6°F+0.2°USW00026451
1974Jun55.5°F55.3°F+0.1°USW00026451
1974Jul57.2°F58.8°F-1.6°USW00026451
1974Aug56.3°F56.8°F-0.5°USW00026451
1974Sep49.7°F48.7°F+1.0°USW00026451
1974Oct34.5°F34.7°F-0.1°USW00026451
1974Nov22.6°F22.7°F-0.1°USW00026451
1974Dec18.8°F17.8°F+0.9°USW00026451
1975Jan11.9°F18.5°F-6.6°USW00026451
1975Feb12.9°F20.2°F-7.3°USW00026451
1975Mar22.5°F27.3°F-4.8°USW00026451
1975Apr32.9°F37.0°F-4.1°USW00026451
1975May46.3°F47.6°F-1.3°USW00026451
1975Jun53.0°F55.3°F-2.4°USW00026451
1975Jul58.6°F58.8°F-0.2°USW00026451
1975Aug56.6°F56.8°F-0.2°USW00026451
1975Sep49.3°F48.7°F+0.6°USW00026451
1975Oct34.6°F34.7°F-0.1°USW00026451
1975Nov14.2°F22.7°F-8.5°USW00026451
1975Dec11.6°F17.8°F-6.2°USW00026451
1976Jan17.0°F18.5°F-1.5°USW00026451
1976Feb12.7°F20.2°F-7.5°USW00026451
1976Mar24.1°F27.3°F-3.2°USW00026451
1976Apr34.8°F37.0°F-2.2°USW00026451
1976May44.9°F47.6°F-2.7°USW00026451
1976Jun53.6°F55.3°F-1.7°USW00026451
1976Jul58.9°F58.8°F+0.1°USW00026451
1976Aug56.2°F56.8°F-0.5°USW00026451
1976Sep47.3°F48.7°F-1.4°USW00026451
1976Oct33.4°F34.7°F-1.3°USW00026451
1976Nov30.5°F22.7°F+7.8°USW00026451
1976Dec23.1°F17.8°F+5.2°USW00026451
1977Jan32.0°F18.5°F+13.5°USW00026451
1977Feb32.7°F20.2°F+12.5°USW00026451
1977Mar24.7°F27.3°F-2.6°USW00026451
1977Apr35.7°F37.0°F-1.3°USW00026451
1977May46.9°F47.6°F-0.7°USW00026451
1977Jun57.8°F55.3°F+2.4°USW00026451
1977Jul62.5°F58.8°F+3.7°USW00026451
1977Aug60.2°F56.8°F+3.4°USW00026451
1977Sep50.7°F48.7°F+2.0°USW00026451
1977Oct38.3°F34.7°F+3.6°USW00026451
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2005Dec25.4°F17.8°F+7.6°USW00026451
2006Jan10.6°F18.5°F-7.9°USW00026451
2006Feb21.9°F20.2°F+1.7°USW00026451
2006Mar23.7°F27.3°F-3.6°USW00026451
2006Apr35.8°F37.0°F-1.2°USW00026451
2006May48.6°F47.6°F+1.0°USW00026451
2006Jun54.4°F55.3°F-0.9°USW00026451
2006Jul58.2°F58.8°F-0.6°USW00026451
2006Aug54.9°F56.8°F-1.9°USW00026451
2006Sep49.5°F48.7°F+0.8°USW00026451
2006Oct39.0°F34.7°F+4.3°USW00026451
2006Nov11.5°F22.7°F-11.3°USW00026451
2006Dec21.5°F17.8°F+3.7°USW00026451
2007Jan16.7°F18.5°F-1.8°USW00026451
2007Feb17.3°F20.2°F-2.9°USW00026451
2007Mar14.3°F27.3°F-13.0°USW00026451
2007Apr38.4°F37.0°F+1.4°USW00026451
2007May47.3°F47.6°F-0.3°USW00026451
2007Jun54.5°F55.3°F-0.9°USW00026451
2007Jul58.2°F58.8°F-0.6°USW00026451
2007Aug58.2°F56.8°F+1.4°USW00026451
2007Sep50.5°F48.7°F+1.8°USW00026451
2007Oct35.5°F34.7°F+0.9°USW00026451
2007Nov30.8°F22.7°F+8.0°USW00026451
2007Dec19.5°F17.8°F+1.6°USW00026451
2008Jan13.4°F18.5°F-5.1°USW00026451
2008Feb16.8°F20.2°F-3.4°USW00026451
2008Mar30.2°F27.3°F+3.0°USW00026451
2008Apr33.4°F37.0°F-3.6°USW00026451
2008May45.8°F47.6°F-1.8°USW00026451
2008Jun51.6°F55.3°F-3.7°USW00026451
2008Jul55.8°F58.8°F-3.0°USW00026451
2008Aug55.6°F56.8°F-1.2°USW00026451
2008Sep48.4°F48.7°F-0.3°USW00026451
2008Oct29.3°F34.7°F-5.3°USW00026451
2008Nov21.2°F22.7°F-1.6°USW00026451
2008Dec14.2°F17.8°F-3.6°USW00026451
2009Jan13.0°F18.5°F-5.5°USW00026451
2009Feb17.5°F20.2°F-2.7°USW00026451
2009Mar21.8°F27.3°F-5.5°USW00026451
2009Apr35.3°F37.0°F-1.7°USW00026451
2009May48.5°F47.6°F+0.9°USW00026451
2009Jun54.2°F55.3°F-1.1°USW00026451
2009Jul59.4°F58.8°F+0.6°USW00026451
2009Aug56.2°F56.8°F-0.6°USW00026451
2009Sep49.0°F48.7°F+0.3°USW00026451
2009Oct40.7°F34.7°F+6.1°USW00026451
2009Nov20.5°F22.7°F-2.2°USW00026451
2009Dec20.2°F17.8°F+2.4°USW00026451
2010Jan18.4°F18.5°F-0.1°USW00026451
2010Feb25.6°F20.2°F+5.4°USW00026451
2010Mar27.0°F27.3°F-0.2°USW00026451
2010Apr36.8°F37.0°F-0.1°USW00026451
2010May48.4°F47.6°F+0.8°USW00026451
2010Jun54.3°F55.3°F-1.1°USW00026451
2010Jul56.5°F58.8°F-2.3°USW00026451
2010Aug56.6°F56.8°F-0.2°USW00026451
2010Sep49.7°F48.7°F+1.0°USW00026451
2010Oct38.2°F34.7°F+3.5°USW00026451
2010Nov26.0°F22.7°F+3.2°USW00026451
2010Dec11.2°F17.8°F-6.7°USW00026451
2011Jan18.8°F18.5°F+0.3°USW00026451
2011Feb17.2°F20.2°F-3.1°USW00026451
2011Mar25.0°F27.3°F-2.2°USW00026451
2011Apr37.6°F37.0°F+0.6°USW00026451
2011May48.1°F47.6°F+0.5°USW00026451
2011Jun54.3°F55.3°F-1.1°USW00026451
2011Jul58.0°F58.8°F-0.8°USW00026451
2011Aug55.5°F56.8°F-1.3°USW00026451
2011Sep49.7°F48.7°F+1.0°USW00026451
2011Oct37.7°F34.7°F+3.0°USW00026451
2011Nov14.8°F22.7°F-7.9°USW00026451
2011Dec23.7°F17.8°F+5.9°USW00026451
2012Jan2.9°F18.5°F-15.6°USW00026451
2012Feb25.3°F20.2°F+5.1°USW00026451
2012Mar20.9°F27.3°F-6.4°USW00026451
2012Apr38.7°F37.0°F+1.7°USW00026451
2012May45.8°F47.6°F-1.8°USW00026451
2012Jun54.9°F55.3°F-0.5°USW00026451
2012Jul56.2°F58.8°F-2.5°USW00026451
2012Aug56.8°F56.8°F+0.0°USW00026451
2012Sep49.0°F48.7°F+0.3°USW00026451
2012Oct34.3°F34.7°F-0.3°USW00026451
2012Nov18.5°F22.7°F-4.2°USW00026451
2012Dec15.7°F17.8°F-2.2°USW00026451
2013Jan23.3°F18.5°F+4.8°USW00026451
2013Feb26.0°F20.2°F+5.8°USW00026451
2013Mar24.7°F27.3°F-2.6°USW00026451
2013Apr29.3°F37.0°F-7.7°USW00026451
2013May45.3°F47.6°F-2.3°USW00026451
2013Jun59.4°F55.3°F+4.1°USW00026451
2013Jul62.2°F58.8°F+3.4°USW00026451
2013Aug58.5°F56.8°F+1.7°USW00026451
2013Sep49.2°F48.7°F+0.5°USW00026451
2013Oct43.9°F34.7°F+9.3°USW00026451
2013Nov23.1°F22.7°F+0.4°USW00026451
2013Dec15.7°F17.8°F-2.1°USW00026451
2014Jan30.3°F18.5°F+11.8°USW00026451
2014Feb19.2°F20.2°F-1.0°USW00026451
2014Mar27.6°F27.3°F+0.3°USW00026451
2014Apr38.5°F37.0°F+1.5°USW00026451
2014May52.5°F47.6°F+4.9°USW00026451
2014Jun54.8°F55.3°F-0.6°USW00026451
2014Jul60.6°F58.8°F+1.8°USW00026451
2014Aug58.5°F56.8°F+1.7°USW00026451
2014Sep50.4°F48.7°F+1.7°USW00026451
2014Oct34.7°F34.7°F+0.1°USW00026451
2014Nov31.4°F22.7°F+8.6°USW00026451
2014Dec27.9°F17.8°F+10.1°USW00026451
2015Jan20.5°F18.5°F+2.0°USW00026451
2015Feb25.1°F20.2°F+4.9°USW00026451
2015Mar29.8°F27.3°F+2.5°USW00026451
2015Apr40.7°F37.0°F+3.7°USW00026451
2015May50.2°F47.6°F+2.6°USW00026451
2015Jun59.5°F55.3°F+4.1°USW00026451
2015Jul62.2°F58.8°F+3.4°USW00026451
2015Aug58.9°F56.8°F+2.1°USW00026451
2015Sep46.4°F48.7°F-2.3°USW00026451
2015Oct40.5°F34.7°F+5.8°USW00026451
2015Nov23.9°F22.7°F+1.1°USW00026451
2015Dec21.6°F17.8°F+3.8°USW00026451
2016Jan27.2°F18.5°F+8.7°USW00026451
2016Feb30.0°F20.2°F+9.8°USW00026451
2016Mar33.5°F27.3°F+6.2°USW00026451
2016Apr43.5°F37.0°F+6.5°USW00026451
2016May52.0°F47.6°F+4.4°USW00026451
2016Jun59.1°F55.3°F+3.7°USW00026451
2016Jul62.7°F58.8°F+3.9°USW00026451
2016Aug60.5°F56.8°F+3.7°USW00026451
2016Sep51.7°F48.7°F+3.0°USW00026451
2016Oct35.9°F34.7°F+1.3°USW00026451
2016Nov26.2°F22.7°F+3.5°USW00026451
2016Dec16.2°F17.8°F-1.6°USW00026451
2017Jan13.8°F18.5°F-4.7°USW00026451
2017Feb18.9°F20.2°F-1.3°USW00026451
2017Mar19.4°F27.3°F-7.9°USW00026451
2017Apr40.4°F37.0°F+3.4°USW00026451
2017May47.9°F47.6°F+0.3°USW00026451
2017Jun55.3°F55.3°F+0.0°USW00026451
2017Jul60.2°F58.8°F+1.4°USW00026451
2017Aug57.5°F56.8°F+0.7°USW00026451
2017Sep51.6°F48.7°F+2.9°USW00026451
2017Oct39.2°F34.7°F+4.5°USW00026451
2017Nov21.0°F22.7°F-1.7°USW00026451
2017Dec26.6°F17.8°F+8.7°USW00026451
2018Jan20.3°F18.5°F+1.8°USW00026451
2018Feb19.1°F20.2°F-1.1°USW00026451
2018Mar27.8°F27.3°F+0.5°USW00026451
2018Apr39.6°F37.0°F+2.7°USW00026451
2018May48.5°F47.6°F+0.9°USW00026451
2018Jun56.5°F55.3°F+1.2°USW00026451
2018Jul61.4°F58.8°F+2.6°USW00026451
2018Aug58.3°F56.8°F+1.5°USW00026451
2018Sep55.0°F48.7°F+6.3°USW00026451
2018Oct44.8°F34.7°F+10.2°USW00026451
2018Nov30.2°F22.7°F+7.5°USW00026451
2018Dec25.7°F17.8°F+7.9°USW00026451
2019Jan20.4°F18.5°F+1.9°USW00026451
2019Feb20.9°F20.2°F+0.7°USW00026451
2019Mar35.8°F27.3°F+8.5°USW00026451
2019Apr40.1°F37.0°F+3.1°USW00026451
2019May50.2°F47.6°F+2.6°USW00026451
2019Jun60.5°F55.3°F+5.1°USW00026451
2019Jul65.2°F58.8°F+6.5°USW00026451
2019Aug62.7°F56.8°F+5.9°USW00026451
2019Sep52.7°F48.7°F+4.0°USW00026451
2019Oct41.8°F34.7°F+7.1°USW00026451
2019Nov35.7°F22.7°F+13.0°USW00026451
2019Dec24.9°F17.8°F+7.0°USW00026451
2020Jan6.4°F18.5°F-12.2°USW00026451
2020Feb18.9°F20.2°F-1.3°USW00026451
2020Mar21.7°F27.3°F-5.6°USW00026451
2020Apr36.7°F37.0°F-0.3°USW00026451
2020May50.4°F47.6°F+2.8°USW00026451
2020Jun55.5°F55.3°F+0.2°USW00026451
2020Jul61.0°F58.8°F+2.2°USW00026451
2020Aug58.8°F56.8°F+2.0°USW00026451
2020Sep50.6°F48.7°F+1.9°USW00026451
2020Oct37.3°F34.7°F+2.6°USW00026451
2020Nov21.5°F22.7°F-1.2°USW00026451
2020Dec22.8°F17.8°F+4.9°USW00026451
2021Jan22.4°F18.5°F+3.9°USW00026451
2021Feb14.4°F20.2°F-5.8°USW00026451
2021Mar19.3°F27.3°F-7.9°USW00026451
2021Apr34.9°F37.0°F-2.1°USW00026451
2021May48.0°F47.6°F+0.4°USW00026451
2021Jun56.5°F55.3°F+1.1°USW00026451
2021Jul59.1°F58.8°F+0.3°USW00026451
2021Aug57.3°F56.8°F+0.5°USW00026451
2021Sep47.5°F48.7°F-1.2°USW00026451
2021Oct37.9°F34.7°F+3.2°USW00026451
2021Nov15.9°F22.7°F-6.9°USW00026451
2021Dec17.2°F17.8°F-0.6°USW00026451
2022Jan20.8°F18.5°F+2.3°USW00026451
2022Feb28.2°F20.2°F+8.0°USW00026451
2022Mar32.4°F27.3°F+5.2°USW00026451
2022Apr38.0°F37.0°F+1.0°USW00026451
2022May50.9°F47.6°F+3.3°USW00026451
2022Jun60.1°F55.3°F+4.7°USW00026451
2022Jul59.4°F58.8°F+0.6°USW00026451
2022Aug56.1°F56.8°F-0.7°USW00026451
2022Sep50.3°F48.7°F+1.6°USW00026451
2022Oct36.8°F34.7°F+2.1°USW00026451
2022Nov23.7°F22.7°F+1.0°USW00026451
2022Dec14.8°F17.8°F-3.1°USW00026451
2023Jan23.9°F18.5°F+5.4°USW00026451
2023Feb20.1°F20.2°F-0.1°USW00026451
2023Mar25.1°F27.3°F-2.2°USW00026451
2023Apr32.5°F37.0°F-4.5°USW00026451
2023May46.3°F47.6°F-1.3°USW00026451
2023Jun53.9°F55.3°F-1.5°USW00026451
2023Jul58.1°F58.8°F-0.7°USW00026451
2023Aug58.8°F56.8°F+2.0°USW00026451
2023Sep48.2°F48.7°F-0.5°USW00026451
2023Oct36.2°F34.7°F+1.5°USW00026451
2023Nov28.1°F22.7°F+5.4°USW00026451
2023Dec16.9°F17.8°F-0.9°USW00026451
2024Jan13.4°F18.5°F-5.1°USW00026451
2024Feb22.1°F20.2°F+1.9°USW00026451
2024Mar28.9°F27.3°F+1.6°USW00026451
2024Apr37.5°F37.0°F+0.6°USW00026451
2024May46.8°F47.6°F-0.8°USW00026451
2024Jun56.6°F55.3°F+1.3°USW00026451
2024Jul58.3°F58.8°F-0.5°USW00026451
2024Aug56.1°F56.8°F-0.7°USW00026451
2024Sep50.2°F48.7°F+1.5°USW00026451
2024Oct37.0°F34.7°F+2.3°USW00026451
2024Nov21.0°F22.7°F-1.7°USW00026451
2024Dec25.9°F17.8°F+8.0°USW00026451
2025Jan26.9°F18.5°F+8.4°USW00026451
2025Feb22.9°F20.2°F+2.7°USW00026451
2025Mar33.1°F27.3°F+5.9°USW00026451
2025Apr39.3°F37.0°F+2.4°USW00026451
2025May47.5°F47.6°F-0.1°USW00026451
2025Jun54.1°F55.3°F-1.3°USW00026451
2025Jul59.8°F58.8°F+1.0°USW00026451
2025Aug58.0°F56.8°F+1.2°USW00026451
2025Sep50.6°F48.7°F+1.9°USW00026451
2025Oct41.1°F34.7°F+6.5°USW00026451
2025Nov23.2°F22.7°F+0.4°USW00026451
2025Dec13.5°F17.8°F-4.4°USW00026451
2026Jan13.6°F18.5°F-4.9°USW00026451

Showing 889 of 889 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).

21

Initial gaps

10

Filled

11

Unfillable

Fill stations: ANCHORAGE MERRILL FIELD, 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: 1977 – 2002 (100% coverage)

MonthBaselineYears
January18.5°F26/26
February20.2°F26/26
March27.3°F26/26
April37.0°F26/26
May47.6°F26/26
June55.3°F26/26
July58.8°F26/26
August56.8°F26/26
September48.7°F26/26
October34.7°F26/26
November22.7°F26/26
December17.8°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 Anchorage, Alaska getting warmer?

Based on 74+ years of NOAA temperature records, Anchorage has warmed at a rate of approximately 0.61°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 Anchorage?

The warmest year on record in Anchorage was 2019, based on average annual temperature anomaly from NOAA station data.

Where does the temperature data for Anchorage come from?

Data comes from the ANCHORAGE TED STEVENS INTERNATIONAL AIRPORT, AK US weather station, part of NOAA's Global Historical Climatology Network. This station has recorded 74+ years of temperature observations used to build Anchorage's climate profile.

How are the climate visualizations for Anchorage created?

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

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

Wear Anchorage's Climate Story

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