Superior Weather Records

Superior, Wisconsin weather averages and records from 1909–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Superior, Wisconsin was 105 °F which occurred on July 14, 1936.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Superior, Wisconsin was -38 °F which occurred on February 12, 1967.
Lowest Temperatures: All-Time By Year
Superior Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 22.2 5.5 55 -37 0.9 12.2
February 27.3 9.8 60 -38 0.9 12.0
March 36.2 21.2 80 -38 1.5 8.4
April 46.0 31.6 92 -2 2.6 3.3
May 57.5 40.8 96 11 3.4 0.0
June 67.4 49.5 98 25 4.5 0.0
July 76.2 57.9 105 34 3.9 0.0
August 74.8 58.2 99 31 3.9 0.0
September 66.6 50.2 97 19 3.4 0.0
October 53.0 38.7 89 9 3.1 0.2
November 39.6 26.1 79 -19 2.1 6.1
December 27.3 13.2 60 -32 1.3 11.0
Entire year 49.5 33.7 105 -38 30.5 50.9
More Superior Weather Records
1909–2024
Highest daily low 80 °F August 9, 1949
Lowest daily high -21 °F January 16, 1982
Greatest daily range
(Difference of high and low)
60 °F May 4, 1986
Greatest difference in daily high
over two conscutive days
52 °F Jan 28–29, 1934
Most daily precipitation 5.8 inches July 1, 1958
Most monthly precipitation 12.2 inches June 2012
Most yearly precipitation 46.5 inches 1991
Most yearly days with precipitation 143 1945
Earliest snow in season October 9 1917
Latest snow in season May 17 1950
Most daily snow 18.0 inches February 24, 2001
Most monthly snow 53.8 inches November 1991
Most yearly snow 96.2 inches 1991
Most snow in a winter 103.0 inches 1964–1965
Greatest snow accumulation 54.0 inches April 1, 1965
Earliest freeze August 20 1950
Earliest day ≥ 70 °F March 7 1987
Earliest day ≥ 80 °F March 28 1946
Earliest day ≥ 90 °F April 27 1952
Latest freeze June 21 1963
Latest day ≥ 70 °F November 17 1953
Latest day ≥ 80 °F October 23 1963
Latest day ≥ 90 °F September 26 1920
Most days in a year < 0 °F 65 1917
Most days in a year < 32 °F 202 1961
Most days in a year ≥ 80 °F 77 1961
Most days in a year ≥ 90 °F 16 1948
Most days in a year ≥ 100 °F 4 1936
Superior Weather Streaks
Most consecutive days...
With precipitation 14 days Sep 8–21, 1954
Without precipitation 54 days Sep 26 – Nov 18, 1953
With snow 8 days Jan 2–9, 1937
High temperature at or
below freezing
64 days Dec 19, 1978 – Feb 20, 1979
High temperature ≥ 80 °F 18 days Jul 15 – Aug 1, 1959
High temperature ≥ 90 °F 6 days Jun 27 – Jul 2, 1910
Plant Hardiness Zone
5A
Superior is in plant hardiness zone 5A
based on average yearly minimum temperature from 1991–2020
Superior Weather by Year
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Weather Station Details
Years Station Coordinates
1909–2024 Superior location