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

Alert Ua Threshold Days by Year (CA002400306)

6 fixed thresholds counted per year at Alert Ua (CA002400306): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alert Ua Thresholds

  • Alert Ua: nights with a minimum temperature at or below 0 C (32 F) in 4 years, most in 1958 with 313.
  • Alert Ua: nights with a minimum temperature at or below -10 C (14 F) in 4 years, most in 1958 with 243.
  • Alert Ua: nights with a minimum temperature at or below -20 C (-4 F) in 4 years, most in 1958 with 196.
  • Alert Ua: nights with a minimum temperature at or below -30 C (-22 F) in 4 years, most in 1958 with 139.
  • 6 fixed thresholds have at least one qualifying day at Alert Ua.
4 years with a qualifying day
Nights at or below 0 C (32 F) per year at Alert Ua Days per year at Alert Ua with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 313 in 1958. 01002003004001958: 3131978: 3051980: 3211981: 3121958197819801981
Days per year at Alert Ua with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 313 in 1958.
Nights at or below 0 C (32 F) per year at Alert Ua
YearDaysDecade average
1958313313
1978305305
1980321316.5
1981312316.5
First to last qualifying date each year at Alert Ua For each year, a bar from the first to the last day at Alert Ua meeting 0 C (32 F). 1958: 1 January 1958 to 31 December 19581978: 1 January 1978 to 31 December 19781980: 1 January 1980 to 31 December 19801981: 1 January 1981 to 31 December 19811958197819801981JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alert Ua meeting 0 C (32 F).
First to last qualifying date each year at Alert Ua
YearFirst dateLast date
19581958-01-011958-12-31
19781978-01-011978-12-31
19801980-01-011980-12-31
19811981-01-011981-12-31

Every Fixed Threshold

Fixed thresholds at Alert Ua
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
0 C (32 F): Ice days (max22541958239
0 C (32 F): Frost days (min43131958312
-10 C (14 F): Days with min42431958224
-20 C (-4 F): Days with min41961958184
-30 C (-22 F): Days with min41391958117
-40 C (-40 F): Days with min428195816

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1958.

Download the Data

  • Data for Alert Ua 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).