Average Temperatures for Wisconsin in May





Average temperatures for May 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 May temperatures
High °F Low °F Place High °C Low °C
67 46 Appleton 20 8
66 40 Crivitz, High Falls Flowage 19 4
66 46 Fond du Lac 19 8
67 46 Green Bay 20 8
64 47 Kenosha 18 8
72 48 Lake Geneva 22 9
62 44 Manitowoc 16 7
64 44 Marinette 18 7
67 48 Milwaukee 19 9
67 48 Oshkosh 20 9
61 46 Racine 16 8
63 46 Sheboygan 17 8
62 43 Sturgeon Bay 17 6
59 40 Washington Island 15 4
68 47 Watertown 20 8
69 47 Whitewater 20 8

Southwest Wisconsin

Average daily temperatures in May
High °F Low °F Place High °C Low °C
70 46 Baraboo 21 8
67 46 Beaver Dam 19 8
67 46 Beloit 19 8
72 50 La Crosse 22 10
69 47 Madison 21 8
69 47 Platteville 20 8
70 48 Prairie du Chien 21 9
66 45 Viroqua 19 7
69 45 Wisconsin Dells 21 7
68 44 Wisconsin Rapids 20 6

Northern Wisconsin

May temperatures: daily averages
High °F Low °F Place High °C Low °C
64 41 Drummond 18 5
70 45 Eau Claire 21 7
65 43 Park Falls 18 6
65 41 Rest Lake, Manitowish Waters 18 5
65 40 Rhinelander 18 5
68 45 Rice Lake 20 7
68 43 River Falls 20 6
68 46 St Croix Falls 20 8
67 45 Stevens Point 19 7
67 45 Wausau 20 7
63 41 Willow Reservoir 17 5

Lake Superior Shore

Average May temperatures
High °F Low °F Place High °C Low °C
64 39 Ashland 18 4
63 41 Bayfield 17 5
64 41 Hurley 18 5
61 38 Madeline Island 16 4
57 41 Superior 14 5
Reference

NOAA National Centers for Environmental Information (NCEI). Climate Normals.

Wisconsin Temperatures
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