Snow in Northbrook, Illinois Winter storm alerts · 7-day snow forecast · average snowfall
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Northbrook averages 33.6 inches of snow a year. The snowiest month is January (11.3″), and snow usually falls from October through April. On about 12 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 53 days of an average winter.
Average snowfall by month
Month
Snowfall
Days 1″+
Days with snow cover
Freezing nights
Avg. low
October
0.1″
0
0
3
45°F
November
1.9″
1
2
15
33°F
December
5.9″
3
10
26
24°F
January
11.3″
4
20
28
18°F
February
7.7″
3
14
25
21°F
March
5.6″
2
7
20
30°F
April
1.1″
<1
1
6
39°F
Year
33.6″
12
53
122
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Chicago Botanic Garden (2 mi from the city center, -23 ft elevation difference); temperatures at Chicago Palwaukee Airport. Averages smooth out big years: single winters can bring half or double the normal.
33.6 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Chicago Botanic Garden station, 2 miles away). The snowiest month is January with 11.3 inches.
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How many freezing nights does Northbrook have?
About 122 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 18 °F.