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

Yellowknife Hydro Threshold Days by Year (CA002204200)

13 fixed thresholds counted per year at Yellowknife Hydro (CA002204200): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Yellowknife Hydro Thresholds

  • Yellowknife Hydro: days with a maximum temperature at or below 0 C (32 F) in 36 years, most in 1961 with 208.
  • Yellowknife Hydro: days with 10 mm (0.39 in) or more of precipitation in 35 years, most in 1958 with 11.
  • Yellowknife Hydro: nights with a minimum temperature at or below 0 C (32 F) in 34 years, most in 1959 with 279.
  • Yellowknife Hydro: nights with a minimum temperature at or below -10 C (14 F) in 34 years, most in 1961 with 205.
  • 13 fixed thresholds have at least one qualifying day at Yellowknife Hydro.
11 years with a qualifying day
Days at or above 30 C (86 F) per year at Yellowknife Hydro Days per year at Yellowknife Hydro with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 3 in 1975. 01231944: 11945: 11948: 11951: 21953: 11955: 21961: 11973: 11975: 31979: 21982: 2194419481953196119751982
Days per year at Yellowknife Hydro with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 3 in 1975.
Days at or above 30 C (86 F) per year at Yellowknife Hydro
YearDaysDecade average
194411
194511
194811
195121.7
195311.7
195521.7
196111
197312
197532
197922
198222
First to last qualifying date each year at Yellowknife Hydro For each year, a bar from the first to the last day at Yellowknife Hydro meeting 30 C (86 F). 1944: 19 July 1944 to 19 July 19441945: 8 August 1945 to 8 August 19451948: 18 July 1948 to 18 July 19481951: 18 July 1951 to 5 August 19511953: 8 August 1953 to 8 August 19531955: 23 June 1955 to 24 June 19551961: 6 July 1961 to 6 July 19611973: 25 June 1973 to 25 June 19731975: 2 July 1975 to 12 July 19751979: 27 June 1979 to 1 July 19791982: 7 July 1982 to 8 July 1982194419481953196119751982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Yellowknife Hydro meeting 30 C (86 F).
First to last qualifying date each year at Yellowknife Hydro
YearFirst dateLast date
19441944-07-191944-07-19
19451945-08-081945-08-08
19481948-07-181948-07-18
19511951-07-181951-08-05
19531953-08-081953-08-08
19551955-06-231955-06-24
19611961-07-061961-07-06
19731973-06-251973-06-25
19751975-07-021975-07-12
19791979-06-271979-07-01
19821982-07-071982-07-08

Every Fixed Threshold

Fixed thresholds at Yellowknife Hydro
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days11319752
90 F (32.2 C): Days1119751
0 C (32 F): Ice days (max362081961177
0 C (32 F): Frost days (min342791959255
-10 C (14 F): Days with min342051961160
-20 C (-4 F): Days with min341441948118
-30 C (-22 F): Days with min34103198266
-40 C (-40 F): Days with min3441196619
20 C (68 F): Tropical nights (min1319483
10 mm (0.39 in): Days with 10 mm or more rain351119588
25 mm (0.98 in): Days with 25 mm or more rain14219571
10 cm (3.9 in): Days with 10 cm or more snowfall15519791
25 cm (9.8 in): Days with 25 cm or more snowfall1119701

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1944.

Download the Data

  • Data for Yellowknife Hydro 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).