Portage Weather Records

Portage, Wisconsin weather averages and records from 1889–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in Portage, Wisconsin was 111 °F which occurred on July 14, 1936.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in Portage, Wisconsin was -37 °F which occurred on February 1, 1918.
Lowest Temperatures: All-Time By Year
Portage Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧 Snow ❄️
January 26.5 10.1 57 -35 1.4 11.2
February 30.9 13.5 72 -37 1.4 10.3
March 42.8 24.5 83 -25 2.1 5.7
April 56.1 36.0 99 5 4.1 2.2
May 68.6 47.9 102 20 4.6 0.0
June 78.3 57.9 104 29 5.6 0.0
July 82.0 61.7 111 37 4.5 0.0
August 80.2 59.6 103 33 4.1 0.0
September 72.9 51.0 103 17 3.6 0.0
October 59.6 39.3 93 8 2.9 0.4
November 44.6 28.5 76 -10 2.2 2.1
December 32.1 17.3 67 -24 1.7 9.3
Entire year 56.3 37.4 111 -37 38.2 42.9
More Portage Weather Records
1889–2024
Highest daily low 84 °F September 10, 1931
Lowest daily high -17 °F January 19, 1994
Greatest daily range
(Difference of high and low)
61 °F February 28, 2024
Greatest difference in daily high
over two conscutive days
47 °F Jan 19–20, 1996
Most daily precipitation 7.5 inches August 28, 2020
Most monthly precipitation 18.3 inches June 2008
Most yearly precipitation 54.0 inches 2018
Most yearly days with precipitation 140 2008
Earliest snow in season October 11 1990
Latest snow in season May 10 1902
Most daily snow 13.0 inches January 30, 1947
Most monthly snow 41.9 inches December 2008
Most yearly snow 115.3 inches 2008
Most snow in a winter 89.8 inches 2007–2008
Greatest snow accumulation 30.0 inches February 21, 2008
Earliest freeze September 4 1974
Earliest day ≥ 80 °F March 18 2012
Earliest day ≥ 90 °F April 10 1930
Earliest day ≥ 100 °F May 31 1934
Latest freeze June 11 1972
Latest day ≥ 80 °F October 29 1937
Latest day ≥ 90 °F October 6 1963
Latest day ≥ 100 °F September 6 1922
Most days in a year < 0 °F 46 1917
Most days in a year < 32 °F 184 1976
Most days in a year ≥ 80 °F 108 1933
Most days in a year ≥ 90 °F 51 1921
Most days in a year ≥ 100 °F 11 1911
Most days in a year ≥ 110 °F 1 1936
Portage Weather Streaks
Most consecutive days...
With precipitation 13 days Sep 29 – Oct 11, 2002
Without precipitation 38 days Jan 3 – Feb 9, 1942
With snow 6 days Feb 18–23, 1962
High temperature at or
below freezing
52 days Dec 30, 1978 – Feb 19, 1979
High temperature ≥ 80 °F 64 days Jun 11 – Aug 13, 1910
High temperature ≥ 90 °F 14 days Jul 12–25, 1901
High temperature ≥ 100 °F 9 days Jul 7–15, 1936
Plant Hardiness Zone
5A
Portage is in plant hardiness zone 5A
based on average yearly minimum temperature from 1991–2020
Portage Weather by Year
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Weather Station Details
Years Station Coordinates
1889–2024 Portage WWTP location