Climate Change in Tok, Alaska

64+ years of recorded temperature data show Tok is warming.

Based on our analysis of 64 years of temperature data near Tok, AK, this area shows a warming trend of approximately +0.7°F per decade. 6 of the last 10 years recorded above-average temperatures, and 1993 was the warmest year on record at +3.3°F above the historical baseline.

Key Climate Facts

Rate of Change

+0.7°F

per decade

Warmest Year

1993

+3.3°F anomaly

Recent Warm Years

6 / 10

above-average years

Decade Shift

+3.1°F

2010s vs 1950s

Compared to the National Average

Tok is warming 0.5°F/decade faster than the national average.

National: +0.20°F/decade
Tok: +0.69°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 Tok's long-term warming trend.

Temperature anomaly spiral for Tok, Alaska
Climate spiral: monthly temperature anomalies from 64+ years of NOAA records for Tok, 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 Tok, Alaska
Warming stripes: each stripe is one year of average temperature anomaly for Tok, AK.

Temperature Trend

Annual temperature anomalies plotted over time with a linear regression trend line. The slope of +0.69°F per decade quantifies the rate of change.

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

Temperature by Decade

1950s
-2.72°F
1960s
-2.28°F
1970s
-3.72°F
1980s
-0.30°F
1990s
-0.21°F
2000s
+0.18°F
2010s
+0.32°F

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

Anomaly Scale

-13.0°F Colder Normal +8.6°F Warmer

Color bounds are set to the 5th and 95th percentile of anomalies to avoid outlier washout.

Monthly Temperature Records

Complete monthly temperature record for Tok, AK. Filter by decade or download as CSV.

Data Sources & Audit

Station
TOK, AK US
Distance
36.8 mi
Coverage
86.2%
Records
662
Range
1954-01 – 2017-12
Gap-filled
65 from 7 stations
Full Data Audit 727 records
YearMonthTempBaselineAnomalySourceGap
1954Jan-19.6°F-10.9°F-8.7°USW00026440
1954Feb-18.5°F-2.8°F-15.7°USW00026440
1954Mar10.4°F10.6°F-0.2°USW00026440
1954Apr20.8°F31.9°F-11.0°USW00026440
1954May47.6°F46.1°F+1.5°USW00026440
1954Jun55.8°F57.0°F-1.2°USW00026440
1954Jul58.3°F59.7°F-1.4°USW00026440
1954Aug55.2°F53.6°F+1.6°USW00026440
1954Sep41.8°F42.2°F-0.4°USC00509313
1954Oct29.4°F22.0°F+7.3°USC00509313
1954Nov14.7°F-1.0°F+15.7°USC00509313
1954Dec-21.6°F-8.4°F-13.2°USC00509313
1955Mar8.3°F10.6°F-2.3°USC00509313
1955Apr23.5°F31.9°F-8.3°USC00509313
1955May39.8°F46.1°F-6.3°USC00509313
1955Jun50.8°F57.0°F-6.2°USC00509313
1955Jul58.5°F59.7°F-1.2°USC00509313
1955Aug50.2°F53.6°F-3.4°USC00509313
1955Sep40.8°F42.2°F-1.4°USC00509313
1955Oct21.7°F22.0°F-0.3°USC00509313
1955Nov-15.2°F-1.0°F-14.2°USC00509313
1955Dec-16.0°F-8.4°F-7.6°USC00509313
1956Jan-26.6°F-10.9°F-15.7°USC00509313
1956Feb-12.6°F-2.8°F-9.8°USC00509313
1956Mar5.8°F10.6°F-4.8°USC00509313
1956Apr28.7°F31.9°F-3.1°USC00509313
1956May42.9°F46.1°F-3.1°USC00509313
1956Jun52.9°F57.0°F-4.1°USC00509313
1956Jul57.9°F59.7°F-1.8°USC00509313
1956Aug52.9°F53.6°F-0.7°USC00509313
1956Sep39.4°F42.2°F-2.8°USC00509313
1956Oct17.6°F22.0°F-4.4°USC00509313
1956Nov0.2°F-1.0°F+1.1°USC00509313
1956Dec-29.9°F-8.4°F-21.5°USC00509313
1957Jan-8.0°F-10.9°F+2.9°USC00509313
1957Feb-5.1°F-2.8°F-2.3°USC00509313
1957Mar15.7°F10.6°F+5.1°USW00026440
1957Apr28.7°F31.9°F-3.2°USC00509313
1957May43.8°F46.1°F-2.2°USC00509313
1957Jun57.5°F57.0°F+0.4°USC00509313
1957Jul55.9°F59.7°F-3.7°USC00509313
1957Aug57.0°F53.6°F+3.4°USC00509313
1957Sep41.2°F42.2°F-1.0°USC00509313
1957Oct25.4°F22.0°F+3.4°USC00509313
1957Nov12.8°F-1.0°F+13.8°USC00509313
1957Dec-17.3°F-8.4°F-8.9°USC00509313
1958Jan-9.9°F-10.9°F+1.0°USC00509313
1958Feb-7.2°F-2.8°F-4.4°USC00509313
1958Mar11.6°F10.6°F+1.0°USC00509313
1958Apr32.8°F31.9°F+0.9°USC00509313
1958May44.2°F46.1°F-1.9°USW00026440
1958Jun57.6°F57.0°F+0.6°USW00026440
1958Jul60.1°F59.7°F+0.4°USC00509313
1958Aug52.8°F53.6°F-0.8°USC00509313
1958Sep41.8°F42.2°F-0.4°USC00509313
1958Oct14.0°F22.0°F-8.0°USC00509313
1958Nov-1.3°F-1.0°F-0.3°USC00509313
1958Dec-14.2°F-8.4°F-5.8°USC00509313
1959Jan-25.2°F-10.9°F-14.3°USC00509313
1959Feb1.9°F-2.8°F+4.7°USC00509313
1959Mar-0.7°F10.6°F-11.3°USC00509313
1959Apr27.2°F31.9°F-4.6°USC00509313
1959May44.7°F46.1°F-1.4°USC00509313
1959Jun57.4°F57.0°F+0.4°USC00509313
1959Jul55.0°F59.7°F-4.7°USC00509313
1959Aug52.8°F53.6°F-0.7°USC00509313
1959Sep43.4°F42.2°F+1.2°USC00509313
1959Oct19.7°F22.0°F-2.3°USC00509313
1959Nov1.3°F-1.0°F+2.3°USC00509313
1959Dec-10.8°F-8.4°F-2.4°USC00509313
1960Jan-8.7°F-10.9°F+2.3°USC00509313
1960Feb6.1°F-2.8°F+8.9°USC00509313
1960Mar2.8°F10.6°F-7.8°USC00509313
1960Apr27.4°F31.9°F-4.4°USC00509313
1960May48.5°F46.1°F+2.4°USC00509313
1960Jun49.9°F57.0°F-7.1°USC00509313
1960Jul53.9°F59.7°F-5.8°USC00509313
1960Aug51.5°F53.6°F-2.1°USC00509313
1960Sep40.9°F42.2°F-1.3°USC00509313
1960Oct25.9°F22.0°F+3.9°USC00509313
1960Nov-1.4°F-1.0°F-0.4°USC00509313
1960Dec-4.0°F-8.4°F+4.4°USC00509313
1961Jan-12.5°F-10.9°F-1.5°USC00509313
1961Feb-7.6°F-2.8°F-4.8°USC00509313
1961Mar-1.2°F10.6°F-11.8°USC00509313
1961Apr23.6°F31.9°F-8.2°USC00509313
1961May44.8°F46.1°F-1.2°USC00509313
1961Jul56.9°F59.7°F-2.7°USC00509313
1961Aug53.8°F53.6°F+0.3°USC00509313
1961Sep42.6°F42.2°F+0.4°USC00509313
1961Oct21.1°F22.0°F-0.9°USC00509313
1961Nov-6.2°F-1.0°F-5.2°USC00509313
1961Dec-27.0°F-8.4°F-18.6°USC00509313
1962Jan-11.6°F-10.9°F-0.6°USC00509313
1962Feb1.9°F-2.8°F+4.7°USC00509313
1962Mar7.1°F10.6°F-3.5°USC00509313
1962Apr30.0°F31.9°F-1.8°USC00509313
1962May42.2°F46.1°F-3.8°USC00509313
1962Jun54.3°F57.0°F-2.7°USC00509313
1962Jul59.7°F59.7°F+0.0°USC00509313
1962Aug55.4°F53.6°F+1.8°USC00509313
1962Sep40.3°F42.2°F-1.9°USC00509313
1962Oct29.3°F22.0°F+7.3°USC00509313
1962Nov4.6°F-1.0°F+5.6°USC00509313
1962Dec-8.9°F-8.4°F-0.4°USC00509313
1963Jan-5.4°F-10.9°F+5.5°USC00509313
1963Feb3.5°F-2.8°F+6.3°USC00509313
1963Mar10.0°F10.6°F-0.6°USW00026440
1963Apr25.2°F31.9°F-6.7°USW00026440
1963May47.8°F46.1°F+1.7°USC00509313
1963Jun51.4°F57.0°F-5.7°USW00026440
1963Jul61.2°F59.7°F+1.6°USC00509313
1963Aug58.7°F53.6°F+5.1°USC00509313
1963Sep44.6°F42.2°F+2.4°USW00026440
1963Oct24.4°F22.0°F+2.4°USC00509313
1963Nov-13.9°F-1.0°F-13.0°USC00509313
1963Dec-10.7°F-8.4°F-2.3°USC00509313
1964Jan-20.2°F-10.9°F-9.2°USC00509313
1964Feb8.0°F-2.8°F+10.8°USC00509313
1964Mar0.7°F10.6°F-9.9°USC00509313
1964Apr26.9°F31.9°F-5.0°USW00026440
1964May34.9°F46.1°F-11.2°USW00026440
1964Jun52.0°F57.0°F-5.0°USC00509313
1964Jul45.8°F59.7°F-13.8°USC00509313
1964Oct28.9°F22.0°F+6.9°USC00502522
1964Nov3.5°F-1.0°F+4.5°USC00509313
1964Dec-27.8°F-8.4°F-19.3°USC00509313
1965Jan-28.2°F-10.9°F-17.3°USC00509313
1965Feb-20.7°F-2.8°F-17.9°USC00509313
1965Mar29.9°F10.6°F+19.3°USC00509313
1965Apr30.4°F31.9°F-1.5°USC00509313
1965May47.2°F46.1°F+1.1°USC00509313
1965Jun54.9°F57.0°F-2.1°USC00502522
1965Jul56.1°F59.7°F-3.6°USC00502522
1965Aug51.2°F53.6°F-2.4°USC00502522
1965Oct15.9°F22.0°F-6.1°USC00502522
1965Nov-6.9°F-1.0°F-5.9°USW00026440
1965Dec-12.4°F-8.4°F-4.0°USW00026440
1966Jan-31.9°F-10.9°F-20.9°USC00509313
1966Feb-8.4°F-2.8°F-5.6°USW00026440
1966Aug51.6°F53.6°F-2.0°USC00502522
1966Sep43.1°F42.2°F+0.9°USC00502522
1966Oct19.8°F22.0°F-2.2°USC00502522
1966Nov0.0°F-1.0°F+1.0°USC00502522
1967Jan-11.3°F-10.9°F-0.4°USC00502522
1967Feb-4.7°F-2.8°F-1.9°USC00502522
1967Mar12.3°F10.6°F+1.7°USC00502522
1967Apr29.7°F31.9°F-2.2°USC00502522
1967May41.1°F46.1°F-5.0°USC00502522
1967Jun55.8°F57.0°F-1.2°USC00502522
1967Jul58.2°F59.7°F-1.5°USW00026440
1967Aug53.0°F53.6°F-0.5°USW00026440
1967Sep42.3°F42.2°F+0.1°USW00026440
1967Oct23.7°F22.0°F+1.7°USC00509313
1967Nov8.7°F-1.0°F+9.7°USC00509313
1967Dec-8.5°F-8.4°F-0.1°USC00509313
1968Jan-12.8°F-10.9°F-1.9°USC00509313
1968Feb-1.4°F-2.8°F+1.4°USC00509313
1968Mar12.6°F10.6°F+2.1°USC00509313
1968Apr26.8°F31.9°F-5.0°USC00509313
1968May44.6°F46.1°F-1.5°USC00509313
1968Jun53.0°F57.0°F-4.0°USC00509313
1968Jul58.9°F59.7°F-0.7°USC00509313
1968Aug52.2°F53.6°F-1.4°USC00509313
1968Sep39.4°F42.2°F-2.8°USC00509313
1968Oct18.5°F22.0°F-3.5°USC00509313
1968Nov-0.5°F-1.0°F+0.5°USC00509313
1968Dec-24.0°F-8.4°F-15.6°USC00509313
1969Jan-35.3°F-10.9°F-24.4°USC00509313
1969Feb-11.1°F-2.8°F-8.3°USC00509313
1969Mar11.8°F10.6°F+1.2°USC00509313
1969Apr33.3°F31.9°F+1.4°USC00509313
1969May43.7°F46.1°F-2.4°USC00509313
1969Jun56.7°F57.0°F-0.3°USC00509313
1969Jul54.5°F59.7°F-5.2°USC00509313
1969Aug45.5°F53.6°F-8.0°USC00509313
1969Sep42.6°F42.2°F+0.4°USC00509313
1969Oct28.4°F22.0°F+6.4°USC00509313
1969Nov-2.7°F-1.0°F-1.7°USC00509313
1969Dec-6.4°F-8.4°F+2.0°USC00509313
1970Jan-24.2°F-10.9°F-13.3°USC00509313
1970Feb3.6°F-2.8°F+6.3°USC00509313
1970Mar21.8°F10.6°F+11.2°USC00509313
1970Apr27.9°F31.9°F-4.0°USC00509313
1970May43.7°F46.1°F-2.4°USC00509313
1970Jun50.3°F57.0°F-6.8°USC00509313
1970Jul55.4°F59.7°F-4.3°USC00509313
1970Aug52.3°F53.6°F-1.3°USC00509313
1970Sep38.3°F42.2°F-3.9°USC00509313
1970Oct15.5°F22.0°F-6.6°USC00509313
1970Nov4.9°F-1.0°F+5.8°USC00509313
1970Dec-16.9°F-8.4°F-8.5°USC00509313
1971Jan-37.6°F-10.9°F-26.7°USC00509313
1971Feb-4.7°F-2.8°F-2.0°USC00509313
1971Mar-1.4°F10.6°F-12.0°USC00509313
1971Apr25.6°F31.9°F-6.2°USC00509313
1971May39.3°F46.1°F-6.7°USC00509313
1971Jun53.9°F57.0°F-3.1°USC00509313
1971Jul57.9°F59.7°F-1.7°USC00509313
1971Aug51.7°F53.6°F-1.9°USC00509313
1971Sep40.9°F42.2°F-1.2°USC00509313
1971Oct21.8°F22.0°F-0.3°USC00509313
1971Nov-5.4°F-1.0°F-4.5°USC00509313
1971Dec-12.7°F-8.4°F-4.3°USC00509313
1972Jan-28.1°F-10.9°F-17.2°USC00509313
1972Feb-16.3°F-2.8°F-13.5°USC00509313
1972Mar-2.3°F10.6°F-12.9°USC00509313
1972Apr20.2°F31.9°F-11.7°USC00509313
1972May41.8°F46.1°F-4.3°USC00502252
1972Jun53.8°F57.0°F-3.2°USC00509313
1972Jul57.0°F59.7°F-2.7°USC00502522
1972Aug53.7°F53.6°F+0.1°USC00509313
1972Sep36.7°F42.2°F-5.5°USC00509313
1972Oct24.1°F22.0°F+2.0°USC00509313
1972Nov-0.7°F-1.0°F+0.3°USC00509313
1972Dec-10.7°F-8.4°F-2.3°USC00509313
1973Jan-26.2°F-10.9°F-15.2°USC00509313
1973Feb-11.5°F-2.8°F-8.7°USC00509313
1973Mar10.7°F10.6°F+0.1°USC00509313
1973Apr33.0°F31.9°F+1.2°USC00509313
1973May45.1°F46.1°F-0.9°USC00502522
1973Jun52.9°F57.0°F-4.1°USC00509313
1973Jul56.9°F59.7°F-2.8°USC00509313
1973Aug51.0°F53.6°F-2.6°USC00509313
1973Oct19.9°F22.0°F-2.1°USC00509313
1973Nov-14.2°F-1.0°F-13.2°USC00509313
1973Dec-13.7°F-8.4°F-5.3°USC00509313
1974Jan-27.3°F-10.9°F-16.3°USC00509313
1974Feb-14.7°F-2.8°F-11.9°USC00509313
1974Mar4.7°F10.6°F-5.9°USC00509313
1974Apr28.1°F31.9°F-3.8°USC00509313
1974May43.0°F46.1°F-3.1°USC00509313
1974Jul56.7°F59.7°F-3.0°USC00509313
1974Aug53.4°F53.6°F-0.1°USC00509313
1974Sep42.7°F42.2°F+0.6°USC00509313
1974Oct20.0°F22.0°F-2.0°USC00509313
1974Nov-3.7°F-1.0°F-2.7°USC00509313
1975Jan-26.3°F-10.9°F-15.3°USC00509313
1975Feb-13.2°F-2.8°F-10.4°USC00509313
1975Mar8.9°F10.6°F-1.7°USC00502522
1975Apr26.7°F31.9°F-5.1°USC00509313
1975Sep43.7°F42.2°F+1.5°USC00509313
1975Oct21.4°F22.0°F-0.6°USC00509313
1975Nov-9.9°F-1.0°F-8.9°USC00509313
1975Dec-22.6°F-8.4°F-14.2°USC00509313
1976Jan-15.2°F-10.9°F-4.2°USC00509313
1976Mar7.9°F10.6°F-2.7°USC00509313
1976Apr30.2°F31.9°F-1.7°USC00509313
1976May42.5°F46.1°F-3.6°USC00509313
1976Jul58.7°F59.7°F-1.0°USC00509313
1976Aug55.2°F53.6°F+1.6°USC00509313
1976Sep40.7°F42.2°F-1.5°USC00509313
1976Oct19.2°F22.0°F-2.8°USC00509313
1976Nov6.6°F-1.0°F+7.5°USC00509313
1977Feb5.3°F-2.8°F+8.1°USC00509313
1977Mar9.0°F10.6°F-1.6°USC00509313
1977Apr29.8°F31.9°F-2.0°USC00509313
1977May43.6°F46.1°F-2.5°USC00509313
1977Jun53.9°F57.0°F-3.1°USC00509313
1977Jul57.1°F59.7°F-2.5°USC00509313
1977Aug58.4°F53.6°F+4.9°USC00509313
1977Sep43.5°F42.2°F+1.3°USC00509313
1977Oct22.4°F22.0°F+0.3°USC00509313
1977Nov-12.5°F-1.0°F-11.6°USC00509313
1977Dec-22.3°F-8.4°F-13.9°USC00509313
1978Feb-2.4°F-2.8°F+0.4°USC00509313
1978Apr30.5°F31.9°F-1.3°USC00509313
1978May43.8°F46.1°F-2.2°USC00509313
1978Jul59.4°F59.7°F-0.2°USC00509313
1978Aug54.5°F53.6°F+0.9°USC00509313
1978Sep43.9°F42.2°F+1.7°USC00509313
1978Oct19.9°F22.0°F-2.1°USC00509313
1978Nov-0.7°F-1.0°F+0.3°USC00509313
1978Dec-4.5°F-8.4°F+3.9°USC00509313
1979Feb-34.3°F-2.8°F-31.5°USC00509313
1979Apr30.8°F31.9°F-1.1°USC00509313
1979Aug55.9°F53.6°F+2.3°USC00509313
1979Sep42.2°F42.2°F+0.0°USC00509313
1979Oct27.5°F22.0°F+5.5°USC00509313
1979Nov12.1°F-1.0°F+13.1°USC00509313
1979Dec-17.0°F-8.4°F-8.6°USC00509313
1980Feb1.9°F-2.8°F+4.7°USC00509313
1980Mar14.3°F10.6°F+3.7°USC00509313
1980Apr31.6°F31.9°F-0.3°USC00509313
1980May44.6°F46.1°F-1.4°USC00509313
1980Jul57.6°F59.7°F-2.0°USC00509313
1980Aug51.7°F53.6°F-1.9°USC00509313
1980Sep39.0°F42.2°F-3.2°USC00509313
1980Oct26.3°F22.0°F+4.3°USC00509313
1980Nov4.6°F-1.0°F+5.5°USC00509313
1981Jan3.7°F-10.9°F+14.6°USC00509313
1981Mar18.1°F10.6°F+7.5°USC00509313
1981Apr25.2°F31.9°F-6.7°USC00509313
1981May49.8°F46.1°F+3.7°USC00509313
1981Jun51.7°F57.0°F-5.3°USC00509313
1981Jul56.1°F59.7°F-3.6°USC00509313
1981Aug52.5°F53.6°F-1.1°USC00509313
1981Sep38.8°F42.2°F-3.4°USC00509313
1981Oct22.3°F22.0°F+0.2°USC00509313
1981Nov4.7°F-1.0°F+5.7°USC00509313
1981Dec-13.7°F-8.4°F-5.3°USC00509313
1982Jan-30.3°F-10.9°F-19.3°USC00509313
1982Feb-9.3°F-2.8°F-6.5°USC00509313
1982Mar6.3°F10.6°F-4.3°USC00509313
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1984Feb-7.1°F-2.8°F-4.3°USC00509313
1984Mar20.8°F10.6°F+10.2°USC00509313
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1985Apr23.4°F31.9°F-8.5°USC00509313
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1987Apr33.4°F31.9°F+1.5°USC00509313
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1987Nov4.2°F-1.0°F+5.2°USC00509313
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1988Jan-12.2°F-10.9°F-1.2°USC00509313
1988Feb-0.8°F-2.8°F+2.0°USC00509313
1988Mar17.2°F10.6°F+6.6°USC00509313
1988Apr34.2°F31.9°F+2.4°USC00509313
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1988Jul63.1°F59.7°F+3.4°USC00509313
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1988Dec-3.2°F-8.4°F+5.2°USC00509313
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1989Feb-6.3°F-2.8°F-3.5°USC00509313
1989Mar4.5°F10.6°F-6.1°USC00509313
1989Apr37.1°F31.9°F+5.3°USC00509313
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1990Mar13.8°F10.6°F+3.2°USC00509313
1990Apr36.2°F31.9°F+4.3°USC00509313
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1990Jun57.4°F57.0°F+0.4°USC00509313
1990Jul58.8°F59.7°F-0.8°USC00509313
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1991Jan-9.7°F-10.9°F+1.3°USC00509313
1991Feb2.5°F-2.8°F+5.2°USC00509313
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1991Jul59.8°F59.7°F+0.2°USR0000ATLA
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1992Mar21.5°F10.6°F+10.9°USR0000ATLA
1992Apr25.8°F31.9°F-6.1°USC00509313
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1995Feb3.7°F-2.8°F+6.5°USC00509313
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1995Apr36.3°F31.9°F+4.5°USC00509313
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1995Oct24.9°F22.0°F+2.9°USC00509313
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1996Jan-20.6°F-10.9°F-9.6°USR0000ATLA
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1996Mar13.0°F10.6°F+2.4°USC00509313
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1996May48.3°F46.1°F+2.2°USR0000ATLA
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1996Nov-8.0°F-1.0°F-7.0°USC00509313
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1997Feb6.7°F-2.8°F+9.5°USC00509313
1997Mar3.9°F10.6°F-6.7°USC00509313
1997Apr30.7°F31.9°F-1.2°USC00509313
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1997Nov8.2°F-1.0°F+9.2°USC00509313
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1998Feb1.4°F-2.8°F+4.2°USC00509313
1998Mar14.2°F10.6°F+3.6°USC00509313
1998Apr35.8°F31.9°F+3.9°USC00509313
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1998Oct18.1°F22.0°F-3.9°USC00509313
1998Nov2.6°F-1.0°F+3.5°USC00509313
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1999Jan-19.9°F-10.9°F-8.9°USC00509313
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1999Mar8.0°F10.6°F-2.6°USC00509313
1999Apr32.3°F31.9°F+0.4°USC00509313
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2000Jan-14.6°F-10.9°F-3.7°USC00509313
2000Feb9.2°F-2.8°F+12.0°USC00509313
2000Mar18.1°F10.6°F+7.5°USC00509313
2000Apr30.3°F31.9°F-1.6°USC00509313
2000May42.7°F46.1°F-3.4°USC00509313
2000Jun56.8°F57.0°F-0.2°USC00509313
2000Jul58.9°F59.7°F-0.8°USC00509313
2000Aug49.6°F53.6°F-4.0°USC00509313
2000Sep41.5°F42.2°F-0.7°USC00509313
2000Oct18.0°F22.0°F-4.0°USC00509313
2000Nov5.8°F-1.0°F+6.7°USC00509313
2000Dec-6.1°F-8.4°F+2.3°USC00509313
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2001Feb2.0°F-2.8°F+4.8°USC00509313
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2001Apr36.5°F31.9°F+4.6°USC00509313
2001May42.4°F46.1°F-3.7°USC00509313
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2001Dec-15.9°F-8.4°F-7.5°USC00509313
2002Jan-0.9°F-10.9°F+10.1°USC00509313
2002Feb-3.9°F-2.8°F-1.2°USC00509313
2002Mar4.7°F10.6°F-5.9°USC00509313
2002Apr23.5°F31.9°F-8.4°USC00509313
2002May46.1°F46.1°F+0.0°USC00509313
2002Jun56.1°F57.0°F-0.9°USC00509313
2002Jul60.3°F59.7°F+0.6°USC00509313
2002Aug52.7°F53.6°F-0.9°USC00509313
2002Sep43.7°F42.2°F+1.5°USC00509313
2002Oct31.4°F22.0°F+9.3°USC00509313
2002Nov16.9°F-1.0°F+17.9°USR0000ATLA
2002Dec0.6°F-8.4°F+9.0°USC00509313
2003Jan-5.0°F-10.9°F+5.9°USC00509313
2003Feb10.7°F-2.8°F+13.5°USC00509313
2003Mar8.6°F10.6°F-2.0°USC00509313
2003Apr30.7°F31.9°F-1.2°USC00509313
2003May44.9°F46.1°F-1.1°USC00509313
2003Jun55.0°F57.0°F-2.1°USC00509313
2003Jul61.4°F59.7°F+1.8°USC00509313
2003Aug53.4°F53.6°F-0.2°USC00509313
2003Sep37.6°F42.2°F-4.6°USC00509313
2003Oct26.1°F22.0°F+4.1°USC00509313
2003Nov3.2°F-1.0°F+4.2°USC00509313
2003Dec-14.3°F-8.4°F-5.9°USC00509313
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2004Feb2.7°F-2.8°F+5.5°USC00509313
2004Mar7.7°F10.6°F-2.9°USC00509313
2004Apr33.2°F31.9°F+1.3°USC00509313
2004May50.6°F46.1°F+4.5°USC00509313
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2004Aug57.7°F53.6°F+4.1°USC00509313
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2004Nov2.5°F-1.0°F+3.4°USC00509313
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2005Oct25.4°F22.0°F+3.4°USC00509313
2005Nov-4.6°F-1.0°F-3.6°USC00509313
2005Dec-1.9°F-8.4°F+6.5°USC00509313
2006Jan-18.0°F-10.9°F-7.1°USC00509313
2006Feb-1.3°F-2.8°F+1.5°USC00509313
2006Mar0.8°F10.6°F-9.8°USC00509313
2006Apr28.0°F31.9°F-3.9°USC00509313
2006May45.1°F46.1°F-0.9°USC00509313
2006Jun55.2°F57.0°F-1.8°USC00509313
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2006Aug51.3°F53.6°F-2.3°USC00509313
2006Sep44.8°F42.2°F+2.6°USC00509313
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2006Nov-17.1°F-1.0°F-16.1°USC00509313
2006Dec-7.0°F-8.4°F+1.4°USC00509313
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2007Apr31.5°F31.9°F-0.4°USC00509313
2007May45.5°F46.1°F-0.6°USC00509313
2007Jun57.9°F57.0°F+0.9°USC00509313
2007Jul60.5°F59.7°F+0.9°USC00509313
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2007Sep43.0°F42.2°F+0.8°USC00509313
2007Oct20.4°F22.0°F-1.6°USC00509313
2007Nov8.5°F-1.0°F+9.5°USC00509313
2007Dec-11.3°F-8.4°F-2.9°USC00509313
2008Jan-13.4°F-10.9°F-2.5°USC00509313
2008Feb-10.4°F-2.8°F-7.6°USC00509313
2008Mar14.5°F10.6°F+3.9°USC00509313
2008Apr31.0°F31.9°F-0.8°USC00509313
2008May43.6°F46.1°F-2.5°USC00509313
2008Jun53.9°F57.0°F-3.1°USC00509313
2008Jul54.5°F59.7°F-5.1°USC00509313
2008Aug49.8°F53.6°F-3.8°USC00509313
2008Sep41.2°F42.2°F-1.0°USR0000AUCR
2008Oct16.0°F22.0°F-6.0°USC00509313
2008Nov-1.3°F-1.0°F-0.3°USC00509313
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2009Jan-17.7°F-10.9°F-6.8°USC00509313
2009Feb-4.7°F-2.8°F-1.9°USC00509313
2009Mar4.9°F10.6°F-5.7°USC00509313
2009Apr31.5°F31.9°F-0.3°USC00509313
2009May47.4°F46.1°F+1.3°USC00509313
2009Jun55.7°F57.0°F-1.3°USC00509313
2009Jul62.7°F59.7°F+3.1°USC00509313
2009Aug54.0°F53.6°F+0.4°USC00509313
2009Sep43.7°F42.2°F+1.5°USC00509313
2009Oct26.2°F22.0°F+4.2°USC00509313
2009Nov-2.7°F-1.0°F-1.7°USC00509313
2009Dec0.3°F-8.4°F+8.7°USR0000AUCR
2010Jan-7.7°F-10.9°F+3.2°USC00509313
2010Feb2.0°F-2.8°F+4.8°USC00509313
2010Mar11.6°F10.6°F+1.0°USC00509313
2010Apr34.1°F31.9°F+2.2°USC00509313
2010May48.6°F46.1°F+2.5°USC00509313
2010Jun55.0°F57.0°F-2.0°USC00509313
2010Jul58.6°F59.7°F-1.1°USC00509313
2010Aug56.5°F53.6°F+2.9°USC00509313
2010Sep41.6°F42.2°F-0.6°USC00509313
2010Oct25.1°F22.0°F+3.1°USC00509313
2010Nov11.2°F-1.0°F+12.2°USC00509313
2010Dec-14.0°F-8.4°F-5.6°USC00509313
2011Jan-12.6°F-10.9°F-1.7°USC00509313
2011Feb-6.4°F-2.8°F-3.6°USC00509313
2011Mar1.2°F10.6°F-9.4°USC00509313
2011Apr29.7°F31.9°F-2.2°USC00509313
2011May47.6°F46.1°F+1.5°USC00509313
2011Jun55.0°F57.0°F-2.0°USC00509313
2011Jul57.5°F59.7°F-2.1°USC00509313
2011Aug51.3°F53.6°F-2.3°USC00509313
2011Sep43.0°F42.2°F+0.8°USC00509313
2011Oct24.3°F22.0°F+2.2°USC00509313
2011Nov-8.0°F-1.0°F-7.1°USC00509313
2011Dec1.6°F-8.4°F+10.0°USC00509313
2012Jan-25.3°F-10.9°F-14.4°USC00509313
2012Feb4.6°F-2.8°F+7.4°USC00509313
2012Mar6.9°F10.6°F-3.7°USC00509313
2012Apr36.2°F31.9°F+4.4°USC00509313
2012May43.4°F46.1°F-2.7°USC00509313
2012Jun55.5°F57.0°F-1.5°USC00509313
2012Jul57.1°F59.7°F-2.6°USC00509313
2012Aug54.1°F53.6°F+0.5°USC00509313
2012Sep45.4°F42.2°F+3.2°USC00509313
2012Oct19.1°F22.0°F-2.9°USC00509313
2012Nov-12.8°F-1.0°F-11.9°USC00509313
2012Dec-24.2°F-8.4°F-15.8°USC00509313
2013Jan-6.4°F-10.9°F+4.6°USC00509313
2013Feb-1.0°F-2.8°F+1.8°USC00509313
2013Mar6.5°F10.6°F-4.1°USC00509313
2013Apr15.3°F31.9°F-16.6°USC00509313
2013May41.7°F46.1°F-4.3°USC00509313
2013Jun59.7°F57.0°F+2.7°USC00509313
2013Jul60.0°F59.7°F+0.3°USC00509313
2013Aug56.4°F53.6°F+2.8°USR0000ATAK
2013Sep41.8°F42.2°F-0.3°USC00509313
2013Oct33.0°F22.0°F+11.0°USC00509313
2013Nov1.2°F-1.0°F+2.2°USC00509313
2013Dec-16.3°F-8.4°F-7.9°USC00509313
2014Jan3.7°F-10.9°F+14.7°USC00509313
2014Feb-10.5°F-2.8°F-7.7°USC00509313
2014Mar9.9°F10.6°F-0.7°USC00509313
2014Apr30.3°F31.9°F-1.6°USC00509313
2014May46.8°F46.1°F+0.7°USC00509313
2014Jun51.9°F57.0°F-5.1°USC00509313
2014Jul57.3°F59.7°F-2.3°USC00509313
2014Aug52.6°F53.6°F-0.9°USC00509313
2014Sep41.4°F42.2°F-0.8°USC00509313
2014Oct21.8°F22.0°F-0.2°USC00509313
2014Nov3.3°F-1.0°F+4.3°USC00509313
2014Dec2.4°F-8.4°F+10.8°USC00509314
2015Jan-11.3°F-10.9°F-0.3°USC00509313
2015Feb-5.1°F-2.8°F-2.3°USC00509313
2015Mar13.6°F10.6°F+3.0°USC00509313
2015Apr34.4°F31.9°F+2.6°USC00509313
2015May51.2°F46.1°F+5.1°USC00509313
2015Jun56.6°F57.0°F-0.4°USC00509313
2015Jul58.6°F59.7°F-1.1°USC00509313
2015Aug51.3°F53.6°F-2.3°USC00509313
2015Sep41.1°F42.2°F-1.1°USC00509313
2015Oct28.8°F22.0°F+6.8°USC00509313
2015Nov3.7°F-1.0°F+4.7°USC00509313
2015Dec-5.8°F-8.4°F+2.6°USC00509313
2016Jan4.0°F-10.9°F+15.0°USC00509313
2016Feb3.3°F-2.8°F+6.1°USC00509313
2016Mar21.8°F10.6°F+11.2°USC00509313
2016Apr38.9°F31.9°F+7.0°USC00509313
2016May48.1°F46.1°F+2.0°USC00509313
2016Jun57.2°F57.0°F+0.2°USC00509313
2016Jul60.3°F59.7°F+0.7°USC00509313
2016Aug56.2°F53.6°F+2.6°USC00509313
2016Sep43.8°F42.2°F+1.6°USC00509313
2016Oct16.3°F22.0°F-5.7°USC00509313
2016Nov2.4°F-1.0°F+3.4°USC00509313
2016Dec-13.8°F-8.4°F-5.4°USC00509313
2017Jan-13.5°F-10.9°F-2.6°USC00509313
2017Feb-3.2°F-2.8°F-0.4°USC00509313
2017Mar-1.3°F10.6°F-11.9°USC00509313
2017Apr32.5°F31.9°F+0.6°USC00509313
2017May44.9°F46.1°F-1.2°USC00509313
2017Jun60.1°F57.0°F+3.1°USC00509313
2017Jul61.2°F59.7°F+1.5°USC00509313
2017Aug54.6°F53.6°F+1.0°USR0000ATAK
2017Sep44.0°F42.2°F+1.8°USR0000ATAK
2017Oct28.0°F22.0°F+6.0°USR0000ATAK
2017Nov-2.6°F-1.0°F-1.6°USR0000ATAK
2017Dec-0.3°F-8.4°F+8.1°USR0000ATAK

Showing 727 of 727 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).

106

Initial gaps

65

Filled

41

Unfillable

Fill stations: TOK NUMBER 2, AK US, DOT LAKE, AK US, CROOKED TEAPOT, AK US, TANACROSS CAA AIRPORT, AK US, TOK AKTAS ALASKA, AK US, T LAKE ALASKA, AK US, UPPER CHARLEY RIVER ALASKA, 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: 1983 – 2008 (96.2% coverage)

Default period 1973-1998 had insufficient coverage, shifted to 1983-2008 (96.2% coverage)

MonthBaselineYears
January-10.9°F25/26
February-2.8°F26/26
March10.6°F26/26
April31.9°F25/26
May46.1°F24/26
June57.0°F26/26
July59.7°F26/26
August53.6°F26/26
September42.2°F25/26
October22.0°F25/26
November-1.0°F26/26
December-8.4°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 Tok, Alaska getting warmer?

Based on 64+ years of NOAA temperature records, Tok has warmed at a rate of approximately 0.69°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 Tok?

The warmest year on record in Tok was 1993, based on average annual temperature anomaly from NOAA station data.

Where does the temperature data for Tok come from?

Data comes from the TOK, AK US weather station, part of NOAA's Global Historical Climatology Network. This station has recorded 64+ years of temperature observations used to build Tok's climate profile.

How are the climate visualizations for Tok created?

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

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

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

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