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

Helm Alaska Threshold Days by Year (USR0000AHLM)

6 fixed thresholds counted per year at Helm Alaska (USR0000AHLM): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Helm Alaska Thresholds

  • Helm Alaska: days with a maximum temperature at or below 0 C (32 F) in 12 years, most in 2021 with 32.
  • Helm Alaska: nights with a minimum temperature at or below 0 C (32 F) in 12 years, most in 2020 with 116.
  • Helm Alaska: days with a maximum temperature at or above 30 C (86 F) in 11 years, most in 2018 with 15.
  • Helm Alaska: days with a maximum temperature at or above 90 F (32.2 C) in 11 years, most in 2024 with 5.
  • 6 fixed thresholds have at least one qualifying day at Helm Alaska.
11 years with a qualifying day
Days at or above 30 C (86 F) per year at Helm Alaska Days per year at Helm Alaska with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 15 in 2018. 0510152015: 52016: 12017: 42018: 152019: 82020: 22021: 52022: 102023: 112024: 82025: 7201520172019202120232025
Days per year at Helm Alaska with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 15 in 2018.
Days at or above 30 C (86 F) per year at Helm Alaska
YearDaysDecade average
201556.6
201616.6
201746.6
2018156.6
201986.6
202027.2
202157.2
2022107.2
2023117.2
202487.2
202577.2
First to last qualifying date each year at Helm Alaska For each year, a bar from the first to the last day at Helm Alaska meeting 30 C (86 F). 2015: 15 June 2015 to 9 July 20152016: 18 July 2016 to 18 July 20162017: 4 August 2017 to 5 September 20172018: 18 June 2018 to 5 August 20182019: 26 May 2019 to 13 August 20192020: 30 July 2020 to 31 July 20202021: 26 June 2021 to 30 July 20212022: 16 June 2022 to 24 August 20222023: 16 May 2023 to 28 August 20232024: 8 July 2024 to 18 August 20242025: 21 June 2025 to 2 September 2025201520172019202120232025JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Helm Alaska meeting 30 C (86 F).
First to last qualifying date each year at Helm Alaska
YearFirst dateLast date
20152015-06-152015-07-09
20162016-07-182016-07-18
20172017-08-042017-09-05
20182018-06-182018-08-05
20192019-05-262019-08-13
20202020-07-302020-07-31
20212021-06-262021-07-30
20222022-06-162022-08-24
20232023-05-162023-08-28
20242024-07-082024-08-18
20252025-06-212025-09-02

Every Fixed Threshold

Fixed thresholds at Helm Alaska
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days111520187
35 C (95 F): Days4220211
90 F (32.2 C): Days11520241
0 C (32 F): Ice days (max1232202118
0 C (32 F): Frost days (min12116202078
-10 C (14 F): Days with min91020227

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 2015.

Download the Data

  • Data for Helm 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

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