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Built 2026-10-19 (19 October 2026)

Yellowknife A Threshold Days by Year (CA002204100)

13 fixed thresholds counted per year at Yellowknife A (CA002204100): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Yellowknife A Thresholds

  • Yellowknife A: days with a maximum temperature at or below 0 C (32 F) in 41 years, most in 1961 with 211.
  • Yellowknife A: nights with a minimum temperature at or below 0 C (32 F) in 41 years, most in 1972 with 255.
  • Yellowknife A: nights with a minimum temperature at or below -10 C (14 F) in 41 years, most in 1961 with 188.
  • Yellowknife A: nights with a minimum temperature at or below -20 C (-4 F) in 41 years, most in 1948 with 142.
  • 13 fixed thresholds have at least one qualifying day at Yellowknife A.
7 years with a qualifying day
Days at or above 30 C (86 F) per year at Yellowknife A Days per year at Yellowknife A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 4 in 1979. 012341945: 21947: 11951: 11961: 11964: 11975: 21979: 41945194719511961196419751979
Days per year at Yellowknife A with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 4 in 1979.
Days at or above 30 C (86 F) per year at Yellowknife A
YearDaysDecade average
194521.5
194711.5
195111
196111
196411
197523
197943
First to last qualifying date each year at Yellowknife A For each year, a bar from the first to the last day at Yellowknife A meeting 30 C (86 F). 1945: 7 August 1945 to 8 August 19451947: 20 July 1947 to 20 July 19471951: 18 July 1951 to 18 July 19511961: 6 July 1961 to 6 July 19611964: 9 July 1964 to 9 July 19641975: 11 July 1975 to 12 July 19751979: 30 June 1979 to 17 August 19791945194719511961196419751979JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Yellowknife A meeting 30 C (86 F).
First to last qualifying date each year at Yellowknife A
YearFirst dateLast date
19451945-08-071945-08-08
19471947-07-201947-07-20
19511951-07-181951-07-18
19611961-07-061961-07-06
19641964-07-091964-07-09
19751975-07-111975-07-12
19791979-06-301979-08-17

Every Fixed Threshold

Fixed thresholds at Yellowknife A
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days7419794
90 F (32.2 C): Days1119641
0 C (32 F): Ice days (max412111961178
0 C (32 F): Frost days (min412551972244
-10 C (14 F): Days with min411881961156
-20 C (-4 F): Days with min411421948116
-30 C (-22 F): Days with min4191198253
-40 C (-40 F): Days with min413519757
20 C (68 F): Tropical nights (min3119551
10 mm (0.39 in): Days with 10 mm or more rain41919574
25 mm (0.98 in): Days with 25 mm or more rain11319691
50 mm (1.97 in): Days with 50 mm or more rain1119731
10 cm (3.9 in): Days with 10 cm or more snowfall20419752

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1945.

Download the Data

  • Data for Yellowknife A 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).