Plymouth Average Temperature by Month

This page shows the average temperature in each month of the year in Plymouth, Wisconsin. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Plymouth?
In Plymouth, Wisconsin, the warmest month is July, with an average daily high temperature of 81.1 °F and an average low of 60.3 °F.
What's the Coldest Month in Plymouth?
In Plymouth, Wisconsin, the coolest month is January, with an average daily high temperature of 26.4 °F and an average low of 11.7 °F.
Month Avg. High Avg. Low
January 26.4 °F 11.7 °F
February 29.7 °F 13.8 °F
March 40.8 °F 23.8 °F
April 53.6 °F 34.4 °F
May 65.7 °F 45.4 °F
June 75.9 °F 55.2 °F
July 81.1 °F 60.3 °F
August 78.8 °F 58.9 °F
September 71.9 °F 50.8 °F
October 58.5 °F 39.5 °F
November 44.2 °F 28.6 °F
December 32.3 °F 18.4 °F
Year 55.0 °F 36.8 °F
Weather Station Details
Years Station Coordinates
1910–2024 Plymouth WWTP location
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