Snow in Naperville, Illinois Winter storm alerts · 7-day snow forecast · average snowfall
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Naperville averages 24.3 inches of snow a year. The snowiest month is January (9.3″), and snow usually falls from November through April. On about 9 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 41 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
5
42°F
November
0.9″
1
1
17
31°F
December
4.2″
2
8
27
21°F
January
9.3″
3
17
29
16°F
February
5.1″
2
11
26
19°F
March
4.5″
1
4
21
28°F
April
0.3″
<1
<1
8
38°F
May
0″
0
0
1
49°F
Year
24.3″
9
41
134
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Wheaton 3 Se (4 mi from the city center, -33 ft elevation difference); temperatures at West Chicago Dupage Airport. Averages smooth out big years: single winters can bring half or double the normal.
24.3 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Wheaton 3 Se station, 4 miles away). The snowiest month is January with 9.3 inches.
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How many freezing nights does Naperville have?
About 134 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 16 °F.