Average Temperatures for Wisconsin in December

Average temperatures for December 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 December temperatures
High °F Low °F Place High °C Low °C
31 17 Appleton -1 -8
28 11 Crivitz, High Falls Flowage -2 -12
31 16 Fond du Lac -1 -9
31 18 Green Bay 0 -8
36 23 Kenosha 2 -5
35 21 Lake Geneva 2 -6
32 20 Manitowoc 0 -7
32 17 Marinette 0 -8
36 23 Milwaukee 2 -5
32 18 Oshkosh 0 -8
35 21 Racine 2 -6
36 22 Sheboygan 2 -6
31 19 Sturgeon Bay 0 -8
32 19 Washington Island 0 -7
32 17 Watertown 0 -8
33 18 Whitewater 1 -8

Southwest Wisconsin

Average daily temperatures in December
High °F Low °F Place High °C Low °C
33 17 Baraboo 1 -9
30 15 Beaver Dam -1 -9
31 17 Beloit -1 -8
33 18 La Crosse 0 -8
32 18 Madison 0 -8
32 17 Platteville 0 -9
33 17 Prairie du Chien 0 -8
28 13 Viroqua -2 -11
32 15 Wisconsin Dells 0 -9
30 12 Wisconsin Rapids -1 -11

Northern Wisconsin

December temperatures: daily averages
High °F Low °F Place High °C Low °C
24 11 Drummond -5 -12
29 13 Eau Claire -2 -11
25 10 Park Falls -4 -12
25 9 Rest Lake, Manitowish Waters -4 -13
26 9 Rhinelander -3 -13
27 10 Rice Lake -3 -12
27 12 River Falls -3 -11
28 11 St Croix Falls -2 -11
29 14 Stevens Point -2 -10
28 14 Wausau -2 -10
25 10 Willow Reservoir -4 -12

Lake Superior Shore

Average December temperatures
High °F Low °F Place High °C Low °C
28 13 Ashland -2 -11
28 15 Bayfield -2 -10
26 11 Hurley -4 -12
28 16 Madeline Island -2 -9
27 13 Superior -3 -11
Reference

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

Wisconsin Temperatures
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