Sioux Lookout Weather Records

Sioux Lookout, Ontario weather averages and records from 1914–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Sioux Lookout, Ontario was 39.4 °C which occurred on July 11, 1936.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Sioux Lookout, Ontario was -46.1 °C which occurred on February 18, 1966.
Lowest Temperatures: All-Time By Year
Sioux Lookout Weather by Month
Averages based on the years 1991–2020
Month Average (°C) Record (°C) Average (cm)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January -12.1 -22.3 6.7 -45.0 3.6 38.9
February -7.7 -19.5 10.7 -46.1 2.5 23.0
March -0.1 -12.3 23.4 -40.0 3.3 24.6
April 8.7 -3.1 30.6 -34.4 4.5 22.3
May 16.1 4.1 33.9 -15.6 9.2 7.0
June 22.1 10.7 39.4 -5.0 10.9 0.0
July 24.3 13.4 39.4 0.6 10.5 0.0
August 23.2 12.5 35.6 -3.9 8.9 0.0
September 17.3 7.5 35.0 -14.4 9.9 0.9
October 8.4 0.7 26.7 -18.9 7.5 19.0
November -0.9 -7.8 19.5 -37.2 5.5 41.7
December -8.7 -17.3 8.9 -42.2 3.8 38.4
Entire year 7.6 -2.7 39.4 -46.1 80.3 214.9
More Sioux Lookout Weather Records
1914–2024
Highest daily low 24.4 °C July 17, 1975
Lowest daily high -35.6 °C January 14, 1972
Greatest daily range
(Difference of high and low)
39.5 °C March 1, 1918
Greatest difference in daily high
over two conscutive days
30.6 °C Feb 26–27, 1925
Most daily precipitation 11.6 cm September 20, 1941
Most monthly precipitation 33.8 cm September 1941
Most yearly precipitation 109.2 cm 2004
Most yearly days with precipitation 196 2001
Earliest snow in season September 4 1991
Latest snow in season June 8 1978
Most daily snow 40.6 cm November 16, 1941
Most monthly snow 106.5 cm November 1933
Most yearly snow 346.4 cm 1950
Most snow in a winter 364.0 cm 1933–1934
Greatest snow accumulation 142.0 cm January 29, 1956
Earliest freeze August 24 1914
Earliest day ≥ 20 °C March 18 2012
Earliest day ≥ 25 °C April 6 1991
Earliest day ≥ 30 °C April 30 1952
Earliest day ≥ 35 °C June 11 1956
Latest freeze June 21 1918
Latest day ≥ 20 °C October 27 1944
Latest day ≥ 25 °C October 21 1953
Latest day ≥ 30 °C September 18 1989
Latest day ≥ 35 °C September 7 1976
Most days in a year < 0 °C 232 1918
Most days in a year ≥ 20 °C 117 2006
Most days in a year ≥ 25 °C 61 1983
Most days in a year ≥ 30 °C 25 1919
Most days in a year ≥ 35 °C 6 1936
Sioux Lookout Weather Streaks
Most consecutive days...
With precipitation 15 days Nov 17 – Dec 1, 2003
Without precipitation 150 days Feb 18 – Jul 16, 2020
With snow 15 days Dec 5–19, 1969
Freezing temperatures
High temperature ≤ 0 °C
116 days Nov 17, 1971 – Mar 11, 1972
High temperature ≥ 20 °C 61 days Jun 7 – Aug 6, 1919
High temperature ≥ 25 °C 20 days Jun 26 – Jul 15, 2012
High temperature ≥ 30 °C 9 days Jun 15–23, 1995
High temperature ≥ 35 °C 3 days Jul 11–13, 1936
Plant Hardiness Zone
3B
Sioux Lookout is in plant hardiness zone 3B
based on average yearly minimum temperature from 1991–2020
Sioux Lookout Weather by Year
More Sioux Lookout Weather
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Weather Station Details
Years Station Coordinates
1938–2024 Sioux Lookout A location
1933–1938 Sioux Lookout location
1914–1932 Sioux Lookout location