Yellowknife Weather Records

Yellowknife, Northwest Territories weather averages and records from 1942–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Yellowknife, Northwest Territories was 32.6 °C which occurred on August 2, 2021.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Yellowknife, Northwest Territories was -51.2 °C which occurred on February 4, 1947.
Lowest Temperatures: All-Time By Year
Yellowknife Weather by Month
Averages based on the years 1991–2020
Month Average (°C) Record (°C) Average (cm)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January -21.2 -29.1 3.4 -51.2 1.7 23.8
February -17.9 -27.2 6.2 -51.2 1.1 16.8
March -10.7 -22.6 9.3 -43.3 1.3 17.8
April 0.3 -11.4 20.4 -40.6 1.1 9.8
May 10.4 0.0 26.3 -22.8 1.5 3.5
June 18.6 9.0 31.1 -4.4 3.0 0.0
July 21.7 12.8 32.5 0.6 3.8 0.0
August 18.4 10.5 32.6 -0.6 4.4 0.0
September 11.1 4.3 26.1 -9.7 3.8 2.2
October 1.5 -3.6 19.0 -28.9 2.6 18.4
November -9.0 -16.2 7.8 -44.4 2.4 35.6
December -17.4 -25.0 2.8 -48.3 1.6 24.5
Entire year 0.6 -8.1 32.6 -51.2 28.6 149.7
More Yellowknife Weather Records
1942–2024
Highest daily low 21.8 °C July 16, 1989
Lowest daily high -43.9 °C December 11, 1948
Greatest daily range
(Difference of high and low)
34.9 °C December 3, 2022
Greatest difference in daily high
over two conscutive days
30.0 °C Dec 2–3, 2022
Most daily precipitation 8.3 cm August 15, 1973
Most monthly precipitation 14.2 cm August 1969
Most yearly precipitation 42.3 cm 1958
Most yearly days with precipitation 160 1958
Earliest snow in season August 23 1982
Latest snow in season June 20 1967
Most daily snow 26.4 cm October 29, 2008
Most monthly snow 85.6 cm November 2006
Most yearly snow 224.3 cm 1959
Most snow in a winter 214.3 cm 1960–1961
Greatest snow accumulation 81.0 cm March 7, 1958
Earliest freeze August 24 1982
Earliest day ≥ 20 °C April 20 2010
Earliest day ≥ 25 °C May 13 2023
Latest freeze June 12 2003
Latest day ≥ 20 °C September 27 2022
Latest day ≥ 25 °C September 15 1967
Most days in a year < 0 °C 246 2018
Most days in a year ≥ 20 °C 71 2022
Most days in a year ≥ 25 °C 25 1989
Most days in a year ≥ 30 °C 4 1989
Yellowknife Weather Streaks
Most consecutive days...
With precipitation 13 days Oct 31 – Nov 12, 1979
Without precipitation 47 days Mar 27 – May 12, 1948
With snow 13 days Oct 31 – Nov 12, 1979
Freezing temperatures
High temperature ≤ 0 °C
182 days Oct 15, 1966 – Apr 14, 1967
High temperature ≥ 20 °C 27 days Jul 11 – Aug 6, 2023
High temperature ≥ 25 °C 10 days Jul 3–12, 1998
High temperature ≥ 30 °C 3 days Jul 14–16, 1989
Plant Hardiness Zone
2B
Yellowknife is in plant hardiness zone 2B
based on average yearly minimum temperature from 1991–2020
Facts About Yellowknife Weather
Yellowknife Weather by Year
More Yellowknife Weather
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Weather Station Details
Years Station Coordinates
2013–2024 Yellowknife A location
1942–2013 Yellowknife A location