Average August Temperatures for Wisconsin

Average temperatures for August at cities, communities and lakes throughout Wisconsin are listed below in degrees Fahrenheit and Celsius.

You can jump to a separate table for each region of the state: Eastern Wisconsin, Southwest Wisconsin, Northern Wisconsin and the Lake Superior Shore.

The tables give the normals for maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Eastern Wisconsin

Average August temperatures
High °F	Low °F	Place	High °C	Low °C
79	60	Appleton	26	15
78	53	Crivitz, High Falls Flowage	25	12
78	59	Fond du Lac	25	15
79	58	Green Bay	26	15
79	64	Kenosha	26	18
83	61	Lake Geneva	29	16
76	60	Manitowoc	24	16
78	59	Marinette	26	15
80	64	Milwaukee	27	18
80	61	Oshkosh	27	16
77	63	Racine	25	17
80	62	Sheboygan	27	17
77	58	Sturgeon Bay	25	15
75	57	Washington Island	24	14
80	59	Watertown	26	15
80	59	Whitewater	27	15

Southwest Wisconsin

Average daily temperatures in August
High °F	Low °F	Place	High °C	Low °C
81	58	Baraboo	27	14
78	58	Beaver Dam	26	15
78	58	Beloit	26	15
83	62	La Crosse	28	17
80	60	Madison	27	15
80	60	Platteville	27	15
81	61	Prairie du Chien	27	16
77	57	Viroqua	25	14
81	57	Wisconsin Dells	27	14
79	56	Wisconsin Rapids	26	14

Northern Wisconsin

August temperatures: daily averages
High °F	Low °F	Place	High °C	Low °C
75	55	Drummond	24	13
80	58	Eau Claire	27	14
76	55	Park Falls	24	13
76	53	Rest Lake, Manitowish Waters	24	11
76	53	Rhinelander	24	11
80	56	Rice Lake	26	14
79	56	River Falls	26	14
80	59	St Croix Falls	27	15
78	58	Stevens Point	25	14
78	57	Wausau	26	14
75	54	Willow Reservoir	24	12

Lake Superior Shore

Average August temperatures
High °F	Low °F	Place	High °C	Low °C
77	53	Ashland	25	12
76	56	Bayfield	24	14
76	54	Hurley	24	12
76	56	Madeline Island	25	13
75	58	Superior	24	14

Average Temperatures for Wisconsin in August

Eastern Wisconsin

Southwest Wisconsin

Northern Wisconsin

Lake Superior Shore

Reference

More Wisconsin Weather Information