Snow in Belleville, Illinois Winter storm alerts · 7-day snow forecast · average snowfall
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Belleville averages 11.2 inches of snow a year. The snowiest month is January (3.4″), and snow usually falls from November through March. On about 4 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 12 days of an average winter.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
October
0″
0
0
3
47°F
November
0.6″
<1
1
11
37°F
December
2.9″
1
3
21
28°F
January
3.4″
1
6
24
24°F
February
3.3″
1
2
19
28°F
March
1.0″
<1
<1
12
36°F
April
0″
0
0
3
46°F
Year
11.2″
4
12
94
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Belleville Siu Rsch (7 mi from the city center, -66 ft elevation difference). Averages smooth out big years: single winters can bring half or double the normal.
11.2 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Belleville Siu Rsch station, 7 miles away). The snowiest month is January with 3.4 inches.
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How many freezing nights does Belleville have?
About 94 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 24 °F.