Portage Average Temperature by Month

This page shows the average temperature in each month of the year in Portage, Wisconsin. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Portage?
In Portage, Wisconsin, the warmest month is July, with an average daily high temperature of 82.0 °F and an average low of 61.7 °F.
What's the Coldest Month in Portage?
In Portage, Wisconsin, the coolest month is January, with an average daily high temperature of 26.5 °F and an average low of 10.1 °F.
Month Avg. High Avg. Low
January 26.5 °F 10.1 °F
February 30.9 °F 13.5 °F
March 42.8 °F 24.5 °F
April 56.1 °F 36.0 °F
May 68.6 °F 47.9 °F
June 78.3 °F 57.9 °F
July 82.0 °F 61.7 °F
August 80.2 °F 59.6 °F
September 72.9 °F 51.0 °F
October 59.6 °F 39.3 °F
November 44.6 °F 28.5 °F
December 32.1 °F 17.3 °F
Year 56.3 °F 37.4 °F
Weather Station Details
Years Station Coordinates
1889–2024 Portage WWTP location
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