Average Temperatures for Wisconsin in May

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Average temperatures for May 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 May temperatures
High °F Low °F Place High °C Low °C
67 47 Appleton 20 9
68 38 Crivitz, High Falls Flowage 20 4
66 46 Fond du Lac 19 8
66 44 Green Bay 19 7
63 46 Kenosha 17 8
71 47 Lake Geneva 22 9
62 45 Manitowoc 17 7
65 45 Marinette 18 7
65 47 Milwaukee 18 8
67 48 Oshkosh 20 9
61 47 Racine 16 8
64 45 Sheboygan 18 7
64 43 Sturgeon Bay 18 6
59 42 Washington Island 15 6

Southwest Wisconsin

Average daily temperatures in May
High °F Low °F Place High °C Low °C
68 46 Beaver Dam 20 8
70 48 Beloit 21 9
71 49 La Crosse 22 9
68 46 Madison 20 8
70 48 Prairie du Chien 21 9
66 45 Viroqua 19 7
70 43 Wisconsin Dells 21 6
70 45 Wisconsin Rapids 21 7

Northern Wisconsin

May temperatures: daily averages
High °F Low °F Place High °C Low °C
66 41 Drummond 19 5
70 45 Eau Claire 21 7
66 42 Park Falls 19 6
66 40 Rest Lake, Manitowish Waters 19 5
66 43 Rhinelander 19 6
67 45 Rice Lake 20 7
69 43 River Falls 21 6
70 46 St Croix Falls 21 8
67 44 Wausau 19 7
64 41 Willow Reservoir 18 5

Lake Superior Shore

Average May temperatures
High °F Low °F Place High °C Low °C
65 39 Ashland 18 4
63 41 Bayfield 17 5
62 39 Madeline Island 17 4
58 41 Superior 14 5
Reference

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

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