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Data as of 2026-10-16
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Built 2026-10-18 (18 October 2026)

Port Alcan Threshold Days by Year

12 fixed thresholds counted per year at Port Alcan (USC00507513): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Port Alcan Thresholds

  • Port Alcan: days with a maximum temperature at or below 0 C (32 F) in 26 years, most in 2023 with 185.
  • Port Alcan: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1986 with 260.
  • Port Alcan: nights with a minimum temperature at or below -10 C (14 F) in 25 years, most in 1986 with 184.
  • Port Alcan: nights with a minimum temperature at or below -20 C (-4 F) in 25 years, most in 2012 with 130.
  • 12 fixed thresholds have at least one qualifying day at Port Alcan.
9 years with a qualifying day
Days at or above 30 C (86 F) per year at Port Alcan Days per year at Port Alcan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 6 in 2004. 02461987: 11989: 41991: 12004: 62009: 12013: 22017: 12019: 12023: 1198719891991200420092013201720192023
Days per year at Port Alcan with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 6 in 2004.
Days at or above 30 C (86 F) per year at Port Alcan
YearDaysDecade average
198712.5
198942.5
199111
200463.5
200913.5
201321.3
201711.3
201911.3
202311
First to last qualifying date each year at Port Alcan For each year, a bar from the first to the last day at Port Alcan meeting 30 C (86 F). 1987: 30 June 1987 to 30 June 19871989: 9 July 1989 to 13 August 19891991: 21 June 1991 to 21 June 19912004: 20 June 2004 to 12 July 20042009: 30 July 2009 to 30 July 20092013: 26 June 2013 to 28 June 20132017: 10 June 2017 to 10 June 20172019: 1 July 2019 to 1 July 20192023: 8 July 2023 to 8 July 202319871991200920172023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Port Alcan meeting 30 C (86 F).
First to last qualifying date each year at Port Alcan
YearFirst dateLast date
19871987-06-301987-06-30
19891989-07-091989-08-13
19911991-06-211991-06-21
20042004-06-202004-07-12
20092009-07-302009-07-30
20132013-06-262013-06-28
20172017-06-102017-06-10
20192019-07-012019-07-01
20232023-07-082023-07-08

Every Fixed Threshold

Fixed thresholds at Port Alcan
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days9620041
90 F (32.2 C): Days1120041
0 C (32 F): Ice days (max26185202397
0 C (32 F): Frost days (min252601986126
-10 C (14 F): Days with min25184198669
-20 C (-4 F): Days with min25130201246
-30 C (-22 F): Days with min2567201223
-40 C (-40 F): Days with min212519909
10 mm (0.39 in): Days with 10 mm or more rain251620108
25 mm (0.98 in): Days with 25 mm or more rain11319891
10 cm (3.9 in): Days with 10 cm or more snowfall16820223
25 cm (9.8 in): Days with 25 cm or more snowfall3120221

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1987.

Download the Data

  • Data for Port Alcan 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-16).