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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Alert Bay Threshold Days by Year (CA001020270)

12 fixed thresholds counted per year at Alert Bay (CA001020270): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alert Bay Thresholds

  • Alert Bay: days with 10 mm (0.39 in) or more of precipitation in 62 years, most in 1939 with 69.
  • Alert Bay: days with 25 mm (0.98 in) or more of precipitation in 62 years, most in 1939 with 23.
  • Alert Bay: days with 50 mm (1.97 in) or more of precipitation in 45 years, most in 1968 with 6.
  • Alert Bay: nights with a minimum temperature at or below 0 C (32 F) in 35 years, most in 1972 with 65.
  • 12 fixed thresholds have at least one qualifying day at Alert Bay.
3 years with a qualifying day
Days at or above 30 C (86 F) per year at Alert Bay Days per year at Alert Bay with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 2 in 1960. 011221955: 11960: 21983: 1195519601983
Days per year at Alert Bay with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 2 in 1960.
Days at or above 30 C (86 F) per year at Alert Bay
YearDaysDecade average
195511
196022
198311
First to last qualifying date each year at Alert Bay For each year, a bar from the first to the last day at Alert Bay meeting 30 C (86 F). 1955: 9 June 1955 to 9 June 19551960: 8 August 1960 to 9 August 19601983: 28 May 1983 to 28 May 1983195519601983JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alert Bay meeting 30 C (86 F).
First to last qualifying date each year at Alert Bay
YearFirst dateLast date
19551955-06-091955-06-09
19601960-08-081960-08-09
19831983-05-281983-05-28

Every Fixed Threshold

Fixed thresholds at Alert Bay
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3219601
90 F (32.2 C): Days1119601
0 C (32 F): Ice days (max281719694
0 C (32 F): Frost days (min3565197226
-10 C (14 F): Days with min5419681
10 mm (0.39 in): Days with 10 mm or more rain6269193949
25 mm (0.98 in): Days with 25 mm or more rain6223193913
50 mm (1.97 in): Days with 50 mm or more rain45619682
100 mm (3.94 in): Days with 100 mm or more rain4119301
10 cm (3.9 in): Days with 10 cm or more snowfall35919712
25 cm (9.8 in): Days with 25 cm or more snowfall11219161
50 cm (19.7 in): Days with 50 cm or more snowfall1119161

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1955.

Download the Data

  • Data for Alert Bay 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 (2026-10-17).