Snow in Sioux Falls, South Dakota Winter storm alerts · 7-day snow forecast · average snowfall
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Sioux Falls averages 45.3 inches of snow a year. The snowiest month is December (8.7″), and snow usually falls from October through May. On about 13 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 73 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
52°F
October
1.4″
1
1
10
38°F
November
6.2″
1
5
24
25°F
December
8.7″
3
16
30
13°F
January
8.0″
2
22
31
9°F
February
8.6″
3
16
27
13°F
March
7.2″
2
10
25
24°F
April
5.1″
1
2
13
36°F
May
0.1″
<1
<1
1
48°F
Year
45.3″
13
73
162
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Sioux Falls (3 mi from the city center, +10 ft elevation difference). Averages smooth out big years: single winters can bring half or double the normal.
45.3 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Sioux Falls station, 3 miles away). The snowiest month is December with 8.7 inches.
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This page checks the National Weather Service for active alerts at Sioux Falls'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 Sioux Falls have?
About 162 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 9 °F.