Climate Change in Healy, Alaska

96+ years of recorded temperature data show Healy is warming.

Based on our analysis of 96 years of temperature data near Healy, AK, this area shows a warming trend of approximately +0.2°F per decade. 9 of the last 10 years recorded above-average temperatures, and 2019 was the warmest year on record at +5.7°F above the historical baseline.

Key Climate Facts

Rate of Change

+0.2°F

per decade

Warmest Year

2019

+5.7°F anomaly

Recent Warm Years

9 / 10

above-average years

Decade Shift

+1.4°F

2020s vs 1930s

Compared to the National Average

Healy is warming at roughly the national average rate.

National: +0.20°F/decade
Healy: +0.22°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 Healy's long-term warming trend.

Temperature anomaly spiral for Healy, Alaska
Climate spiral: monthly temperature anomalies from 96+ years of NOAA records for Healy, 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 Healy, Alaska
Warming stripes: each stripe is one year of average temperature anomaly for Healy, AK.

Temperature Trend

Annual temperature anomalies plotted over time with a linear regression trend line. The slope of +0.22°F per decade quantifies the rate of change.

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

Temperature by Decade

1930s
+0.20°F
1940s
+1.79°F
1950s
-0.07°F
1960s
+0.14°F
1970s
-0.91°F
1980s
+1.04°F
1990s
+0.59°F
2000s
+2.43°F
2010s
+2.55°F
2020s
+1.58°F

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

Anomaly Scale

-10.3°F Colder Normal +11.9°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 Healy, AK. Filter by decade or download as CSV.

Data Sources & Audit

Station
MCKINLEY PARK, AK US
Distance
22.2 mi
Coverage
94.8%
Records
1,092
Range
1930-01 – 2025-12
Gap-filled
56 from 8 stations
Full Data Audit 1,148 records
YearMonthTempBaselineAnomalySourceGap
1930Jan13.5°F0.3°F+13.1°USC00505778
1930Feb-10.6°F3.4°F-14.0°USC00505778
1930Mar9.1°F14.0°F-4.9°USC00505778
1930Apr22.3°F26.4°F-4.1°USC00505778
1930May41.4°F41.7°F-0.3°USC00505778
1930Jun50.8°F51.2°F-0.5°USC00505778
1930Jul55.4°F54.7°F+0.8°USC00505778
1930Aug51.3°F50.2°F+1.1°USC00505778
1930Sep38.9°F40.5°F-1.7°USC00505778
1930Oct22.6°F22.2°F+0.4°USC00505778
1930Nov1.3°F8.3°F-7.0°USC00505778
1930Dec18.9°F3.6°F+15.3°USC00505778
1931Jan16.4°F0.3°F+16.1°USC00505778
1931Feb16.8°F3.4°F+13.4°USC00505778
1931Mar12.7°F14.0°F-1.3°USC00505778
1931Apr25.4°F26.4°F-0.9°USC00505778
1931May36.8°F41.7°F-4.9°USC00505778
1931Jun50.5°F51.2°F-0.7°USC00505778
1931Jul53.8°F54.7°F-0.9°USC00505778
1931Aug50.3°F50.2°F+0.1°USC00505778
1931Sep40.7°F40.5°F+0.2°USC00505778
1931Oct23.0°F22.2°F+0.9°USC00505778
1931Nov19.7°F8.3°F+11.3°USC00505778
1931Dec1.2°F3.6°F-2.4°USC00505778
1932Jan-10.8°F0.3°F-11.2°USC00505778
1932Feb-3.0°F3.4°F-6.4°USC00505778
1932Mar20.8°F14.0°F+6.8°USC00505778
1932Apr29.5°F26.4°F+3.1°USW00026435
1932May42.1°F41.7°F+0.4°USC00505778
1932Jun48.7°F51.2°F-2.6°USC00505778
1932Jul52.5°F54.7°F-2.1°USC00505778
1932Aug47.0°F50.2°F-3.2°USC00505778
1932Sep34.3°F40.5°F-6.2°USC00505778
1932Oct30.1°F22.2°F+7.9°USW00026435
1933Jan-21.5°F0.3°F-21.8°USC00505778
1933Feb-4.3°F3.4°F-7.7°USW00026435
1933Mar11.5°F14.0°F-2.5°USC00505778
1933Apr30.2°F26.4°F+3.8°USC00505778
1933May43.1°F41.7°F+1.4°USC00505778
1933Jun55.8°F51.2°F+4.6°USW00026435
1933Jul54.4°F54.7°F-0.2°USC00505778
1933Aug56.6°F50.2°F+6.3°USW00026435
1933Sep38.6°F40.5°F-2.0°USC00505778
1933Oct19.8°F22.2°F-2.4°USC00505778
1933Nov11.8°F8.3°F+3.5°USC00505778
1933Dec-11.1°F3.6°F-14.7°USC00505778
1934Jan-12.8°F0.3°F-13.1°USC00505778
1934Feb20.0°F3.4°F+16.6°USC00505778
1934Mar15.3°F14.0°F+1.3°USC00505778
1934Apr30.6°F26.4°F+4.3°USC00505778
1934May39.7°F41.7°F-2.0°USC00505778
1934Jun52.9°F51.2°F+1.6°USC00505778
1934Jul51.5°F54.7°F-3.1°USC00505778
1934Aug51.6°F50.2°F+1.4°USC00505778
1934Sep43.8°F40.5°F+3.3°USC00505778
1934Oct29.2°F22.2°F+7.0°USC00505778
1934Nov12.4°F8.3°F+4.0°USC00505778
1934Dec10.8°F3.6°F+7.3°USC00505778
1935Jan1.0°F0.3°F+0.7°USC00505778
1935Feb5.3°F3.4°F+1.9°USW00026435
1935Mar13.7°F14.0°F-0.3°USC00505778
1935Apr26.8°F26.4°F+0.4°USC00505778
1935May43.9°F41.7°F+2.2°USW00026435
1935Jun47.8°F51.2°F-3.4°USC00505778
1935Jul50.6°F54.7°F-4.0°USC00505778
1935Aug45.0°F50.2°F-5.3°USC00505778
1935Sep42.7°F40.5°F+2.2°USW00026435
1935Oct27.4°F22.2°F+5.3°USW00026435
1935Nov5.8°F8.3°F-2.5°USC00505778
1935Dec-14.4°F3.6°F-18.0°USW00026435
1936Jan0.7°F0.3°F+0.3°USW00026435
1936Feb-5.2°F3.4°F-8.6°USW00026435
1936Mar9.6°F14.0°F-4.4°USC00505778
1936Apr26.7°F26.4°F+0.4°USC00505778
1936May41.9°F41.7°F+0.2°USC00505778
1936Jun57.6°F51.2°F+6.4°USC00505778
1936Jul55.6°F54.7°F+1.0°USC00505778
1936Aug53.5°F50.2°F+3.3°USC00505778
1936Sep41.3°F40.5°F+0.8°USC00505778
1936Oct30.2°F22.2°F+8.1°USC00505778
1936Nov8.7°F8.3°F+0.4°USW00026435
1936Dec-8.6°F3.6°F-12.2°USW00026435
1937Jan15.2°F0.3°F+14.9°USW00026435
1937Feb-1.0°F3.4°F-4.4°USC00505778
1937Mar3.8°F14.0°F-10.2°USW00026435
1937Apr23.4°F26.4°F-3.0°USC00505778
1937May43.4°F41.7°F+1.7°USW00026435
1937Jun62.8°F51.2°F+11.6°USW00026435
1937Jul60.6°F54.7°F+5.9°USW00026435
1937Aug51.8°F50.2°F+1.5°USW00026435
1937Sep44.7°F40.5°F+4.2°USC00505778
1937Oct33.2°F22.2°F+11.0°USC00505778
1937Nov12.0°F8.3°F+3.7°USW00026435
1937Dec-4.0°F3.6°F-7.5°USW00026435
1938Feb-6.9°F3.4°F-10.3°USW00026435
1938Mar7.7°F14.0°F-6.3°USW00026435
1938Apr31.3°F26.4°F+4.9°USW00026435
1938May41.8°F41.7°F+0.1°USC00505778
1938Jun50.2°F51.2°F-1.1°USC00505778
1938Jul53.5°F54.7°F-1.1°USC00505778
1938Aug51.8°F50.2°F+1.6°USC00505778
1938Sep47.8°F40.5°F+7.2°USC00505778
1938Oct34.6°F22.2°F+12.4°USC00505778
1938Nov14.5°F8.3°F+6.1°USC00505778
1938Dec0.7°F3.6°F-2.9°USW00026435
1939Jan2.2°F0.3°F+1.9°USC00505778
1939Feb9.3°F3.4°F+5.9°USC00505778
1939Mar6.9°F14.0°F-7.1°USC00505778
1939Apr27.7°F26.4°F+1.4°USC00505778
1939May40.2°F41.7°F-1.5°USC00505778
1939Jun52.2°F51.2°F+0.9°USC00505778
1939Jul54.3°F54.7°F-0.3°USC00505778
1939Aug47.7°F50.2°F-2.6°USC00505778
1939Sep38.9°F40.5°F-1.6°USC00505778
1939Oct18.0°F22.2°F-4.2°USC00505778
1939Nov2.8°F8.3°F-5.6°USC00505778
1939Dec11.9°F3.6°F+8.4°USC00505778
1940Jan11.2°F0.3°F+10.9°USC00505778
1940Feb11.9°F3.4°F+8.5°USC00505778
1940Mar13.1°F14.0°F-0.9°USC00505778
1940Apr38.2°F26.4°F+11.9°USC00505778
1940May43.5°F41.7°F+1.8°USC00505778
1940Jun53.4°F51.2°F+2.2°USC00505778
1940Jul56.8°F54.7°F+2.1°USC00505778
1940Aug52.1°F50.2°F+1.9°USC00505778
1940Sep44.2°F40.5°F+3.7°USC00505778
1940Oct28.6°F22.2°F+6.4°USC00505778
1940Nov16.8°F8.3°F+8.4°USC00505778
1940Dec11.6°F3.6°F+8.1°USC00505778
1941Jan-2.0°F0.3°F-2.3°USC00505778
1941Feb18.2°F3.4°F+14.8°USC00505778
1941Mar13.6°F14.0°F-0.4°USW00026435
1941Apr35.6°F26.4°F+9.2°USC00505778
1941May42.9°F41.7°F+1.2°USC00505778
1941Jun55.4°F51.2°F+4.2°USC00505778
1941Jul53.3°F54.7°F-1.3°USC00505778
1941Aug55.3°F50.2°F+5.0°USC00505778
1941Sep42.1°F40.5°F+1.6°USC00505778
1941Oct22.9°F22.2°F+0.8°USC00505778
1941Nov5.2°F8.3°F-3.1°USC00505778
1941Dec10.8°F3.6°F+7.3°USC00505778
1942Jan14.8°F0.3°F+14.5°USC00505778
1942Feb20.1°F3.4°F+16.7°USC00505778
1942Mar14.9°F14.0°F+0.9°USC00505778
1942Apr31.8°F26.4°F+5.5°USC00505778
1942May46.4°F41.7°F+4.7°USC00505778
1942Jun54.1°F51.2°F+2.8°USC00505778
1942Jul54.9°F54.7°F+0.3°USC00505778
1942Aug48.7°F50.2°F-1.5°USC00505778
1942Sep47.1°F40.5°F+6.6°USC00505778
1942Oct26.7°F22.2°F+4.5°USC00505778
1942Nov1.3°F8.3°F-7.0°USC00505778
1942Dec-14.3°F3.6°F-17.8°USC00505778
1943Jan-6.9°F0.3°F-7.2°USC00505778
1943Feb14.5°F3.4°F+11.0°USC00505778
1943Mar11.0°F14.0°F-3.0°USW00026435
1943Apr27.7°F26.4°F+1.3°USC00505778
1943May45.1°F41.7°F+3.4°USC00505778
1943Jun57.1°F51.2°F+5.9°USC00505778
1943Jul54.3°F54.7°F-0.3°USC00505778
1943Aug50.7°F50.2°F+0.4°USC00505778
1943Sep42.0°F40.5°F+1.5°USC00505778
1943Oct31.0°F22.2°F+8.8°USC00505778
1943Nov22.1°F8.3°F+13.7°USC00505778
1943Dec14.7°F3.6°F+11.2°USC00505778
1944Jan8.0°F0.3°F+7.7°USC00505778
1944Feb21.9°F3.4°F+18.5°USC00505778
1944Mar13.2°F14.0°F-0.8°USC00505778
1944Apr23.8°F26.4°F-2.5°USC00505778
1944May43.6°F41.7°F+1.9°USC00505778
1944Jun53.9°F51.2°F+2.7°USC00505778
1944Jul57.7°F54.7°F+3.0°USC00505778
1944Aug51.6°F50.2°F+1.4°USC00505778
1944Sep41.4°F40.5°F+0.9°USC00505778
1944Oct29.4°F22.2°F+7.2°USC00505778
1944Nov7.9°F8.3°F-0.4°USC00503581
1944Dec10.3°F3.6°F+6.8°USC00505778
1945Jan12.2°F0.3°F+11.8°USC00503581
1945Feb11.1°F3.4°F+7.7°USC00505778
1945Mar11.2°F14.0°F-2.8°USC00505778
1945Apr21.2°F26.4°F-5.2°USC00505778
1945May36.9°F41.7°F-4.8°USC00505778
1945Jun48.6°F51.2°F-2.6°USC00505778
1945Jul52.4°F54.7°F-2.2°USC00505778
1945Aug46.7°F50.2°F-3.5°USC00505778
1945Sep41.6°F40.5°F+1.1°USC00505778
1945Oct25.5°F22.2°F+3.3°USC00505778
1945Nov-4.2°F8.3°F-12.5°USC00505778
1945Dec4.0°F3.6°F+0.4°USC00505778
1946Jan8.3°F0.3°F+7.9°USC00505778
1946Feb5.1°F3.4°F+1.7°USC00505778
1946Mar6.8°F14.0°F-7.2°USC00505778
1946Apr25.0°F26.4°F-1.3°USC00505778
1946May41.7°F41.7°F+0.0°USC00505778
1946Jun55.3°F51.2°F+4.1°USC00505778
1946Jul56.2°F54.7°F+1.6°USC00505778
1946Aug49.6°F50.2°F-0.7°USC00505778
1946Sep41.3°F40.5°F+0.8°USC00505778
1946Oct31.8°F22.2°F+9.7°USC00505778
1946Nov4.7°F8.3°F-3.6°USC00505778
1946Dec-8.0°F3.6°F-11.6°USC00505778
1947Jan-12.9°F0.3°F-13.3°USC00505778
1947Feb13.0°F3.4°F+9.6°USC00505778
1947Mar20.0°F14.0°F+6.0°USC00505778
1947Apr27.5°F26.4°F+1.1°USC00505778
1947May42.9°F41.7°F+1.1°USC00505778
1947Jun51.6°F51.2°F+0.4°USC00505778
1947Jul57.8°F54.7°F+3.2°USC00505778
1947Aug48.5°F50.2°F-1.7°USC00505778
1947Sep39.4°F40.5°F-1.1°USC00505778
1947Oct24.9°F22.2°F+2.7°USC00505778
1947Nov19.3°F8.3°F+10.9°USC00505778
1947Dec8.0°F3.6°F+4.5°USW00026435
1948Jan6.5°F0.3°F+6.2°USC00505778
1948Feb2.8°F3.4°F-0.7°USC00505778
1948Mar12.1°F14.0°F-1.9°USC00505778
1948Apr20.1°F26.4°F-6.3°USC00505778
1948May39.1°F41.7°F-2.6°USC00505778
1948Jun52.0°F51.2°F+0.7°USC00505778
1948Jul53.6°F54.7°F-1.0°USC00505778
1948Aug46.9°F50.2°F-3.3°USC00505778
1948Sep37.1°F40.5°F-3.4°USC00505778
1948Oct27.1°F22.2°F+4.9°USC00505778
1948Nov1.9°F8.3°F-6.4°USC00505778
1948Dec-3.7°F3.6°F-7.3°USC00505778
1949Jan-2.0°F0.3°F-2.4°USW00026435
1949Feb-6.5°F3.4°F-9.9°USW00026435
1949Mar18.6°F14.0°F+4.6°USW00026435
1949Apr18.8°F26.4°F-7.6°USW00026435
1949May38.4°F41.7°F-3.3°USW00026435
1949Jun47.2°F51.2°F-4.1°USW00026435
1949Jul55.3°F54.7°F+0.7°USW00026435
1949Aug52.0°F50.2°F+1.7°USW00026435
1949Sep43.9°F40.5°F+3.4°USC00506089
1949Oct26.3°F22.2°F+4.1°USC00506089
1949Nov21.8°F8.3°F+13.4°USC00505778
1949Dec-1.7°F3.6°F-5.3°USC00505778
1950Feb-13.0°F3.4°F-16.4°USC00506089
1950Mar21.5°F14.0°F+7.5°USC00505778
1950Apr26.0°F26.4°F-0.3°USC00505778
1950May46.4°F41.7°F+4.7°USW00026435
1950Jun52.4°F51.2°F+1.2°USC00505778
1950Jul56.1°F54.7°F+1.5°USC00505778
1950Aug55.2°F50.2°F+5.0°USC00505778
1950Sep43.3°F40.5°F+2.7°USC00505778
1950Oct25.4°F22.2°F+3.2°USC00505778
1950Nov2.9°F8.3°F-5.5°USC00505778
1950Dec3.6°F3.6°F+0.0°USC00505778
1951Jan-8.4°F0.3°F-8.7°USC00505778
1951Feb2.0°F3.4°F-1.4°USC00505778
1951Mar2.6°F14.0°F-11.4°USC00505778
1951Apr32.0°F26.4°F+5.6°USC00505778
1951May44.2°F41.7°F+2.5°USC00505778
1951Jun50.8°F51.2°F-0.4°USC00505778
1951Jul56.5°F54.7°F+1.9°USC00505778
1951Aug52.4°F50.2°F+2.2°USC00505778
1951Sep42.6°F40.5°F+2.1°USW00026435
1951Oct22.3°F22.2°F+0.2°USC00505778
1951Nov16.2°F8.3°F+7.8°USC00505778
1951Dec-2.5°F3.6°F-6.1°USW00026435
1952Jan-7.5°F0.3°F-7.9°USC00505778
1952Feb7.1°F3.4°F+3.7°USC00505778
1952Mar12.5°F14.0°F-1.5°USC00505778
1952Apr24.1°F26.4°F-2.3°USC00505778
1952May36.4°F41.7°F-5.3°USW00026435
1952Jun50.4°F51.2°F-0.8°USC00505778
1952Jul53.1°F54.7°F-1.5°USC00505778
1952Aug48.4°F50.2°F-1.8°USC00505778
1952Sep38.3°F40.5°F-2.2°USC00505778
1952Oct30.9°F22.2°F+8.7°USC00505778
1952Nov22.6°F8.3°F+14.2°USC00505778
1952Dec9.4°F3.6°F+5.8°USC00505778
1953Jan-7.0°F0.3°F-7.3°USC00505778
1953Feb10.4°F3.4°F+7.0°USC00505778
1953Mar11.8°F14.0°F-2.2°USC00505778
1953Apr33.2°F26.4°F+6.8°USC00505778
1953May44.8°F41.7°F+3.1°USC00505778
1953Jun56.4°F51.2°F+5.2°USC00505778
1953Jul56.6°F54.7°F+2.0°USC00505778
1953Aug51.3°F50.2°F+1.0°USC00505778
1953Sep41.9°F40.5°F+1.4°USC00505778
1953Oct22.9°F22.2°F+0.8°USC00505778
1953Nov11.6°F8.3°F+3.2°USC00505778
1953Dec6.0°F3.6°F+2.5°USC00505778
1954Jan-4.7°F0.3°F-5.0°USC00505778
1954Feb-6.2°F3.4°F-9.6°USC00505778
1954Mar17.8°F14.0°F+3.8°USC00505778
1954Apr21.6°F26.4°F-4.7°USC00505778
1954May42.3°F41.7°F+0.6°USC00505778
1954Jun50.8°F51.2°F-0.4°USC00505778
1954Jul51.6°F54.7°F-3.0°USC00505778
1954Aug49.9°F50.2°F-0.3°USC00505778
1954Sep39.2°F40.5°F-1.3°USC00505778
1954Oct29.2°F22.2°F+7.0°USC00505778
1954Nov16.6°F8.3°F+8.2°USC00505778
1954Dec-11.3°F3.6°F-14.9°USC00505778
1955Jan13.1°F0.3°F+12.8°USC00505778
1955Feb0.4°F3.4°F-3.0°USC00505778
1955Mar15.7°F14.0°F+1.8°USC00505778
1955Apr19.9°F26.4°F-6.4°USC00505778
1955May38.2°F41.7°F-3.5°USC00505778
1955Jun47.9°F51.2°F-3.3°USC00505778
1955Jul55.1°F54.7°F+0.4°USC00505778
1955Aug48.0°F50.2°F-2.2°USC00505778
1955Sep41.3°F40.5°F+0.8°USC00505778
1955Oct22.2°F22.2°F+0.0°USC00505778
1955Nov-2.6°F8.3°F-10.9°USC00505778
1955Dec-4.9°F3.6°F-8.4°USC00505778
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2012Feb16.6°F3.4°F+13.1°USC00505778
2012Mar3.0°F14.0°F-11.0°USC00505778
2012Apr33.2°F26.4°F+6.9°USC00505778
2012May40.4°F41.7°F-1.3°USC00505778
2012Jun52.8°F51.2°F+1.6°USC00505778
2012Jul53.9°F54.7°F-0.8°USC00505778
2012Aug50.3°F50.2°F+0.0°USC00505778
2012Sep41.5°F40.5°F+0.9°USC00505778
2012Oct20.0°F22.2°F-2.2°USC00505778
2012Nov-5.1°F8.3°F-13.5°USC00505778
2012Dec-3.1°F3.6°F-6.6°USC00505778
2013Jan9.8°F0.3°F+9.4°USC00505778
2013Feb11.8°F3.4°F+8.4°USC00505778
2013Mar11.1°F14.0°F-2.9°USC00505778
2013Apr13.6°F26.4°F-12.8°USC00505778
2013May36.0°F41.7°F-5.7°USC00505778
2013Jun57.8°F51.2°F+6.6°USC00505778
2013Jul56.2°F54.7°F+1.5°USC00505778
2013Aug53.4°F50.2°F+3.1°USC00505778
2013Sep38.4°F40.5°F-2.1°USC00505778
2013Oct34.7°F22.2°F+12.5°USC00505778
2013Nov10.3°F8.3°F+2.0°USC00505778
2013Dec1.0°F3.6°F-2.5°USC00505778
2014Jan22.9°F0.3°F+22.5°USC00505778
2014Feb1.3°F3.4°F-2.1°USC00505778
2014Mar15.2°F14.0°F+1.2°USC00505778
2014Apr28.9°F26.4°F+2.6°USC00505778
2014May45.1°F41.7°F+3.4°USC00505778
2014Jun49.1°F51.2°F-2.1°USC00505778
2014Jul53.2°F54.7°F-1.4°USC00505778
2014Aug51.8°F50.2°F+1.6°USC00505778
2014Sep41.4°F40.5°F+0.9°USC00505778
2014Oct19.5°F22.2°F-2.7°USC00505778
2014Nov18.9°F8.3°F+10.6°USC00505778
2014Dec16.2°F3.6°F+12.7°USC00505778
2015Jan5.2°F0.3°F+4.9°USC00505778
2015Feb9.8°F3.4°F+6.3°USC00505778
2015Mar17.0°F14.0°F+3.0°USC00505778
2015Apr31.4°F26.4°F+5.0°USC00505778
2015May48.2°F41.7°F+6.5°USC00505778
2015Jun54.0°F51.2°F+2.8°USC00505778
2015Jul54.4°F54.7°F-0.2°USC00505778
2015Aug49.2°F50.2°F-1.1°USC00505778
2015Sep36.9°F40.5°F-3.6°USC00505778
2015Oct30.7°F22.2°F+8.5°USC00505778
2015Nov12.4°F8.3°F+4.0°USC00505778
2015Dec5.1°F3.6°F+1.5°USC00505778
2016Jan14.8°F0.3°F+14.5°USC00505778
2016Feb19.9°F3.4°F+16.5°USC00505778
2016Mar20.4°F14.0°F+6.5°USC00505778
2016Apr37.3°F26.4°F+11.0°USC00505778
2016May45.1°F41.7°F+3.4°USC00505778
2016Jun53.7°F51.2°F+2.5°USC00505778
2016Jul56.2°F54.7°F+1.5°USC00505778
2016Aug53.9°F50.2°F+3.7°USC00505778
2016Sep42.0°F40.5°F+1.5°USC00505778
2016Oct27.0°F22.2°F+4.8°USC00505778
2016Nov10.5°F8.3°F+2.2°USC00505778
2016Dec1.1°F3.6°F-2.5°USC00505778
2017Jan0.8°F0.3°F+0.5°USC00505778
2017Feb10.5°F3.4°F+7.0°USC00505778
2017Mar-0.8°F14.0°F-14.8°USC00505778
2017Apr32.4°F26.4°F+6.0°USC00505778
2017May42.6°F41.7°F+0.9°USC00505778
2017Jun53.9°F51.2°F+2.6°USC00505778
2017Jul57.8°F54.7°F+3.2°USC00505778
2017Aug52.3°F50.2°F+2.1°USC00505778
2017Sep43.2°F40.5°F+2.7°USC00505778
2017Oct29.4°F22.2°F+7.2°USC00505778
2017Nov10.1°F8.3°F+1.8°USC00505778
2017Dec20.5°F3.6°F+16.9°USC00505778
2018Jan3.1°F0.3°F+2.8°USC00505778
2018Feb8.1°F3.4°F+4.7°USC00505778
2018Mar16.8°F14.0°F+2.8°USC00505778
2018Apr27.2°F26.4°F+0.9°USC00505778
2018May41.4°F41.7°F-0.3°USC00505778
2018Jun51.7°F51.2°F+0.5°USC00505778
2018Jul57.1°F54.7°F+2.4°USC00505778
2018Aug50.8°F50.2°F+0.5°USC00505778
2018Sep43.7°F40.5°F+3.1°USC00505778
2018Oct35.2°F22.2°F+13.0°USC00505778
2018Nov19.0°F8.3°F+10.7°USC00505778
2018Dec9.4°F3.6°F+5.8°USC00505778
2019Jan5.5°F0.3°F+5.2°USC00505778
2019Feb12.7°F3.4°F+9.3°USC00505778
2019Mar30.0°F14.0°F+16.0°USC00505778
2019Apr31.3°F26.4°F+4.9°USC00505778
2019May45.4°F41.7°F+3.7°USC00505778
2019Jun56.5°F51.2°F+5.3°USC00505778
2019Jul59.4°F54.7°F+4.8°USC00505778
2019Aug50.6°F50.2°F+0.4°USC00505778
2019Sep43.9°F40.5°F+3.3°USC00505778
2019Oct28.2°F22.2°F+6.0°USC00505778
2019Nov16.0°F8.3°F+7.6°USC00505778
2019Dec5.3°F3.6°F+1.8°USC00505778
2020Jan-13.5°F0.3°F-13.8°USC00505778
2020Feb2.9°F3.4°F-0.5°USC00505778
2020Mar9.4°F14.0°F-4.6°USC00505778
2020Apr27.9°F26.4°F+1.6°USC00505778
2020May45.5°F41.7°F+3.8°USC00505778
2020Jun51.6°F51.2°F+0.3°USC00505778
2020Jul54.8°F54.7°F+0.1°USC00505778
2020Aug52.1°F50.2°F+1.9°USC00505778
2020Sep42.4°F40.5°F+1.8°USC00505778
2020Oct26.7°F22.2°F+4.6°USC00505778
2020Nov9.7°F8.3°F+1.4°USC00505778
2020Dec8.4°F3.6°F+4.8°USC00505778
2021Jan12.8°F0.3°F+12.5°USC00505778
2021Feb0.9°F3.4°F-2.5°USC00505778
2021Mar7.5°F14.0°F-6.5°USC00505778
2021Apr24.7°F26.4°F-1.7°USC00505778
2021May42.4°F41.7°F+0.7°USC00505778
2021Jun53.5°F51.2°F+2.3°USC00505778
2021Jul56.0°F54.7°F+1.4°USC00505778
2021Aug49.8°F50.2°F-0.5°USC00505778
2021Sep37.7°F40.5°F-2.8°USC00505778
2021Oct27.0°F22.2°F+4.9°USC00505778
2021Nov-2.3°F8.3°F-10.7°USC00505778
2021Dec3.7°F3.6°F+0.2°USC00505778
2022Jan0.3°F0.3°F+0.0°USC00505778
2022Feb7.8°F3.4°F+4.4°USC00505778
2022Mar15.1°F14.0°F+1.1°USC00505778
2022Apr25.2°F26.4°F-1.2°USC00505778
2022May41.3°F41.7°F-0.4°USC00505778
2022Jun55.3°F51.2°F+4.1°USC00505778
2022Jul55.5°F54.7°F+0.8°USC00505778
2022Aug50.9°F50.2°F+0.7°USC00505778
2022Sep41.8°F40.5°F+1.3°USC00505778
2022Oct26.3°F22.2°F+4.2°USC00505778
2022Nov13.5°F8.3°F+5.1°USC00505778
2022Dec1.5°F3.6°F-2.0°USC00505778
2023Jan11.3°F0.3°F+11.0°USC00505778
2023Feb6.7°F3.4°F+3.3°USC00505778
2023Mar12.9°F14.0°F-1.1°USC00505778
2023Apr17.9°F26.4°F-8.5°USC00505778
2023May43.3°F41.7°F+1.5°USC00505778
2023Jun51.5°F51.2°F+0.3°USC00505778
2023Jul58.9°F54.7°F+4.2°USC00505778
2023Aug55.5°F50.2°F+5.2°USC00505778
2023Sep39.0°F40.5°F-1.6°USC00505778
2023Oct24.9°F22.2°F+2.8°USC00505778
2023Nov17.9°F8.3°F+9.6°USC00505778
2023Dec2.8°F3.6°F-0.8°USC00505778
2024Jan-1.2°F0.3°F-1.5°USC00505778
2024Feb13.2°F3.4°F+9.8°USC00505778
2024Mar13.4°F14.0°F-0.6°USC00505778
2024Apr29.3°F26.4°F+3.0°USC00505778
2024May43.2°F41.7°F+1.5°USC00505778
2024Jun55.6°F51.2°F+4.3°USC00505778
2024Jul55.4°F54.7°F+0.8°USC00505778
2024Aug49.8°F50.2°F-0.5°USC00505778
2024Sep41.5°F40.5°F+1.0°USC00505778
2024Oct23.9°F22.2°F+1.7°USC00505778
2024Nov7.4°F8.3°F-1.0°USC00505778
2024Dec14.2°F3.6°F+10.6°USC00505778
2025Jan15.8°F0.3°F+15.4°USC00505778
2025Feb10.5°F3.4°F+7.1°USC00505778
2025Mar19.7°F14.0°F+5.7°USC00505778
2025Apr31.7°F26.4°F+5.4°USC00505778
2025May42.6°F41.7°F+0.9°USC00505778
2025Jun53.1°F51.2°F+1.9°USC00505778
2025Jul57.4°F54.7°F+2.7°USC00505778
2025Aug51.3°F50.2°F+1.0°USC00505778
2025Sep41.9°F40.5°F+1.4°USC00505778
2025Oct29.9°F22.2°F+7.7°USC00505778
2025Nov13.9°F8.3°F+5.6°USC00505778
2025Dec-9.6°F3.6°F-13.2°USC00505778

Showing 1,148 of 1,148 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).

60

Initial gaps

56

Filled

4

Unfillable

Fill stations: NENANA MUNICIPAL AIRPORT, AK US, MOUNT MCKINLEY NATIONAL PARK AIRPORT, AK US, MOUNT MC KINLEY, AK US, DENALI VISITOR CENTER ALASKA, AK US, HEALY, AK US, SUMMIT AIRPORT, AK US, HEALY, AK US, CLEAR 4 N, 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: 1965 – 1990 (100% coverage)

MonthBaselineYears
January0.3°F26/26
February3.4°F26/26
March14.0°F26/26
April26.4°F26/26
May41.7°F26/26
June51.2°F26/26
July54.7°F26/26
August50.2°F26/26
September40.5°F26/26
October22.2°F26/26
November8.3°F26/26
December3.6°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 Healy, Alaska getting warmer?

Based on 96+ years of NOAA temperature records, Healy has warmed at a rate of approximately 0.22°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 Healy?

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

Where does the temperature data for Healy come from?

Data comes from the MCKINLEY PARK, AK US weather station, part of NOAA's Global Historical Climatology Network. This station has recorded 96+ years of temperature observations used to build Healy's climate profile.

How are the climate visualizations for Healy created?

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

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

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