Average Temperatures for Wisconsin in September

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Average temperatures for September at cities, towns, parks and lakes throughout Wisconsin are listed below in degrees Fahrenheit and Celsius.

The tables give the normals for maximum and minimum monthly temperatures based on weather data collected from 1981 to 2010.

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

Eastern Wisconsin

Average September temperatures
High °F Low °F Place High °C Low °C
71 51 Appleton 22 11
70 43 Crivitz, High Falls Flowage 21   6
70 51 Fond du Lac 21 11
70 49 Green Bay 21   9
71 55 Kenosha 22 13
76 53 Lake Geneva 24 12
68 54 Manitowoc 20 12
69 52 Marinette 21 11
71 55 Milwaukee 22 13
72 52 Oshkosh 22 11
70 56 Racine 21 13
72 55 Sheboygan 22 13
70 51 Sturgeon Bay 21 10
67 52 Washington Island 19 11

Southwest Wisconsin

Average daily temperatures in September
High °F Low °F Place High °C Low °C
72 50 Beaver Dam 22 10
74 52 Beloit 23 11
73 52 La Crosse 23 11
72 50 Madison 22 10
74 51 Prairie du Chien 23 10
69 48 Viroqua 20   9
72 47 Wisconsin Dells 22   8
72 48 Wisconsin Rapids 22   9

Northern Wisconsin

September temperatures: daily averages
High °F Low °F Place High °C Low °C
68 47 Drummond 20   8
71 49 Eau Claire 22   9
67 46 Park Falls 19   8
66 44 Rest Lake, Manitowish Waters 19   7
68 46 Rhinelander 20   8
69 48 Rice Lake 21   9
71 48 River Falls 22   9
72 50 St Croix Falls 22 10
69 48 Wausau 20   9
67 46 Willow Reservoir 19   8

Lake Superior Shore

Average September temperatures
High °F Low °F Place High °C Low °C
68 45 Ashland 20   7
67 49 Bayfield 19   9
68 48 Madeline Island 20   9
66 49 Superior 19 10
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

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