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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Amchitka Threshold Days by Year (USC00500252)

5 fixed thresholds counted per year at Amchitka (USC00500252): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Amchitka Thresholds

  • Amchitka: days with a maximum temperature at or below 0 C (32 F) in 8 years, most in 1944 with 38.
  • Amchitka: nights with a minimum temperature at or below 0 C (32 F) in 8 years, most in 1944 with 140.
  • Amchitka: days with 10 mm (0.39 in) or more of precipitation in 7 years, most in 1949 with 44.
  • Amchitka: days with 25 mm (0.98 in) or more of precipitation in 7 years, most in 1946 with 7.
  • 5 fixed thresholds have at least one qualifying day at Amchitka.
8 years with a qualifying day
Nights at or below 0 C (32 F) per year at Amchitka Days per year at Amchitka with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 140 in 1944. 0501001501943: 1091944: 1401945: 1351946: 1241947: 921948: 641949: 1241990: 9919431944194519461947194819491990
Days per year at Amchitka with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 140 in 1944.
Nights at or below 0 C (32 F) per year at Amchitka
YearDaysDecade average
1943109112.6
1944140112.6
1945135112.6
1946124112.6
194792112.6
194864112.6
1949124112.6
19909999
First to last qualifying date each year at Amchitka For each year, a bar from the first to the last day at Amchitka meeting 0 C (32 F). 1943: 1 February 1943 to 31 December 19431944: 1 January 1944 to 31 December 19441945: 1 January 1945 to 31 December 19451946: 1 January 1946 to 31 December 19461947: 2 February 1947 to 31 December 19471948: 1 February 1948 to 31 December 19481949: 1 January 1949 to 28 December 19491990: 2 January 1990 to 17 December 199019431944194519461947194819491990JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Amchitka meeting 0 C (32 F).
First to last qualifying date each year at Amchitka
YearFirst dateLast date
19431943-02-011943-12-31
19441944-01-011944-12-31
19451945-01-011945-12-31
19461946-01-011946-12-31
19471947-02-021947-12-31
19481948-02-011948-12-31
19491949-01-011949-12-28
19901990-01-021990-12-17

Every Fixed Threshold

Fixed thresholds at Amchitka
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
0 C (32 F): Ice days (max838194415
0 C (32 F): Frost days (min8140194499
10 mm (0.39 in): Days with 10 mm or more rain744194916
25 mm (0.98 in): Days with 25 mm or more rain7719462
50 mm (1.97 in): Days with 50 mm or more rain2119461

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1943.

Download the Data

  • Data for Amchitka threshold days by year: CSV or JSON. Field meanings are on the data page.

Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).