Summit Average Temperature by Month

This page shows the average temperature in each month of the year in Summit, South Dakota. It is based on NOAA data for the years 1991–2020.
What's the Hottest Month in Summit?
In Summit, South Dakota, the warmest month is July, with an average daily high temperature of 81.4 °F and an average low of 58.0 °F.
What's the Coldest Month in Summit?
In Summit, South Dakota, the coolest month is January, with an average daily high temperature of 20.1 °F and an average low of 2.1 °F.
Month Avg. High Avg. Low
January 20.1 °F 2.1 °F
February 25.2 °F 6.2 °F
March 38.2 °F 18.3 °F
April 54.1 °F 30.3 °F
May 67.6 °F 42.8 °F
June 76.5 °F 53.5 °F
July 81.4 °F 58.0 °F
August 79.8 °F 56.3 °F
September 72.5 °F 47.9 °F
October 56.9 °F 34.3 °F
November 39.3 °F 20.7 °F
December 25.2 °F 8.6 °F
Year 53.3 °F 31.8 °F
Weather Station Details
Years Station Coordinates
1956–2024 Summit 1 W location
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