Snow in Algonquin, Illinois Winter storm alerts · 7-day snow forecast · average snowfall
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Algonquin averages 32.1 inches of snow a year. The snowiest month is January (9.5″), and snow usually falls from November through April. On about 11 days a year at least an inch falls. Snow covers the ground (1″+) on roughly 44 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
41°F
November
1.4″
1
1
18
30°F
December
8.7″
3
9
28
20°F
January
9.5″
3
17
29
14°F
February
8.0″
3
13
26
17°F
March
3.7″
1
4
23
26°F
April
0.8″
<1
1
9
37°F
Year
32.1″
11
44
139
NOAA NCEI U.S. Climate Normals 1991–2020 — snowfall at Elgin (7 mi from the city center, +20 ft elevation difference). Averages smooth out big years: single winters can bring half or double the normal.
32.1 inches in an average year (NOAA U.S. Climate Normals 1991–2020, Elgin station, 7 miles away). The snowiest month is January with 9.5 inches.
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How many freezing nights does Algonquin have?
About 139 nights a year drop to 32 °F or below (NOAA 1991–2020); the coldest month, January, averages a low of 14 °F.