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Data as of 2026-10-14
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Built 2026-10-16 (16 October 2026)

Port Alsworth Alaska Threshold Days by Year

8 fixed thresholds counted per year at Port Alsworth Alaska (USR0000APAL): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Port Alsworth Alaska Thresholds

  • Port Alsworth Alaska: days with a maximum temperature at or below 0 C (32 F) in 26 years, most in 1999 with 119.
  • Port Alsworth Alaska: nights with a minimum temperature at or below 0 C (32 F) in 26 years, most in 2008 with 224.
  • Port Alsworth Alaska: nights with a minimum temperature at or below -10 C (14 F) in 26 years, most in 1999 with 128.
  • Port Alsworth Alaska: nights with a minimum temperature at or below -20 C (-4 F) in 25 years, most in 1999 with 70.
  • 8 fixed thresholds have at least one qualifying day at Port Alsworth Alaska.
9 years with a qualifying day
Days at or above 30 C (86 F) per year at Port Alsworth Alaska Days per year at Port Alsworth Alaska with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 8 in 2019. 024681997: 22002: 12003: 52004: 62005: 12015: 52018: 12019: 82024: 1199720022003200420052015201820192024
Days per year at Port Alsworth Alaska with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 8 in 2019.
Days at or above 30 C (86 F) per year at Port Alsworth Alaska
YearDaysDecade average
199722
200213.3
200353.3
200463.3
200513.3
201554.7
201814.7
201984.7
202411
First to last qualifying date each year at Port Alsworth Alaska For each year, a bar from the first to the last day at Port Alsworth Alaska meeting 30 C (86 F). 1997: 27 June 1997 to 28 June 19972002: 17 July 2002 to 17 July 20022003: 8 July 2003 to 10 August 20032004: 26 June 2004 to 17 August 20042005: 12 August 2005 to 12 August 20052015: 14 June 2015 to 18 June 20152018: 3 July 2018 to 3 July 20182019: 27 June 2019 to 9 July 20192024: 22 July 2024 to 22 July 202419972003200520182024JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Port Alsworth Alaska meeting 30 C (86 F).
First to last qualifying date each year at Port Alsworth Alaska
YearFirst dateLast date
19971997-06-271997-06-28
20022002-07-172002-07-17
20032003-07-082003-08-10
20042004-06-262004-08-17
20052005-08-122005-08-12
20152015-06-142015-06-18
20182018-07-032018-07-03
20192019-06-272019-07-09
20242024-07-222024-07-22

Every Fixed Threshold

Fixed thresholds at Port Alsworth Alaska
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days9820191
90 F (32.2 C): Days2520195
0 C (32 F): Ice days (max26119199974
0 C (32 F): Frost days (min262242008134
-10 C (14 F): Days with min26128199980
-20 C (-4 F): Days with min2570199946
-30 C (-22 F): Days with min1825199923
-40 C (-40 F): Days with min2519975

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1997.

Download the Data

  • Data for Port Alsworth Alaska 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-14).