Snow in Rockford, Illinois Winter storm alerts · 7-day snow forecast · average snowfall
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Rockford averages 37.1 inches of snow a year. The snowiest month is January (10.9″), and snow usually falls from October through April. On about 11 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 55 days of an average winter.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
October
0.2″
0
0
5
42°F
November
2.3″
1
2
18
31°F
December
9.4″
3
13
27
20°F
January
10.9″
4
20
29
15°F
February
8.5″
3
14
26
18°F
March
4.9″
1
5
22
28°F
April
0.9″
<1
<1
7
39°F
May
0″
0
0
1
50°F
Year
37.1″
11
55
136
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Rockford Gtr Rockford Airport (5 mi from the city center, -3 ft elevation difference). Averages smooth out big years: single winters can bring half or double the normal.
37.1 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Rockford Gtr Rockford Airport station, 5 miles away). The snowiest month is January with 10.9 inches.
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How many freezing nights does Rockford have?
About 136 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 15 °F.