Snow in Sun Prairie, Wisconsin Winter storm alerts · 7-day snow forecast · average snowfall
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Sun Prairie averages 51.8 inches of snow a year. The snowiest month is January (13.7″), and snow usually falls from October through May. On about 15 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 78 days of an average winter.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
September
0″
0
0
1
51°F
October
0.6″
<1
<1
7
40°F
November
3.0″
1
3
20
29°F
December
12.0″
3
16
28
18°F
January
13.7″
4
24
30
12°F
February
12.8″
4
22
27
15°F
March
7.0″
2
10
23
25°F
April
2.6″
1
1
10
36°F
May
0.1″
0
0
2
47°F
Year
51.8″
15
78
147
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Madison Dane Rgnl Airport (7 mi from the city center, -89 ft elevation difference). Averages smooth out big years: single winters can bring half or double the normal.
51.8 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Madison Dane Rgnl Airport station, 7 miles away). The snowiest month is January with 13.7 inches.
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This page checks the National Weather Service for active alerts at Sun Prairie's location every time you open it; the box at the top lists any winter storm, winter weather, cold or freeze alert in effect right now.
How many freezing nights does Sun Prairie have?
About 147 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 12 °F.