About Sun Prairie, WI's Climate & Weather History

Sun Prairie is a city of approximately 32,400 people in Wisconsin, United States. Located in the Central Time Zone at 43.2°N latitude.

In 2025, Sun Prairie recorded an average annual temperature of 48°F. The hottest temperatures reached 92°F in June; the coolest were -13°F in February. Total precipitation for the year was 30 inches, with the wettest month being June. Snowfall for the year totaled approximately 11 inches.