Average Annual Snowfall in Illinois

The tables below give yearly averages for snowfall at cities in Illinois. The numbers are for the total amount of snow and for how many days it snows at least 0.1 inches (0.25 centimetres).

The snowfall totals are annual averages based on weather data collected from 1991 to 2020 for the US National Centers for Environmental Information.

You can jump to a separate table for each region of the state: Chicago Area, Northern Illinois, Central Illinois and Southern Illinois.

Place name links take you to more detailed information on snowfall, snowstorms and snow accumulation for that location.

Chicago Area

Average annual snowfall

Days	Place	Inches	Centi­metres
17.1	Aurora	27.9	70.9
22.9	Chicago Botanical Garden	33.6	85.3
28.2	Chicago Midway Airport	38.8	98.6
27.8	Chicago O'Hare Airport	38.4	97.5
21.9	Elgin	32.1	81.5
12.0	Joliet	16.9	42.9

Northern Illinois

Yearly snow averages

Days	Place	Inches	Centi­metres
23.7	DeKalb	33.1	84.1
17.2	Dixon	31.2	79.2
20.8	Freeport	34.5	87.6
25.1	Moline	36.1	91.7
28.1	Rockford	37.1	94.2

Central Illinois

Average total snowfall for a year

Days	Place	Inches	Centi­metres
5.0	Bloomington	6.5	16.5
17.4	Champaign	20.8	52.8
11.9	Charleston	19.0	48.3
9.9	Danville	14.8	37.6
9.6	Decatur	13.6	34.5
16.3	Kankakee	20.7	52.6
14.3	Ottawa	23.7	60.2
20.0	Peoria	26.2	66.5
16.3	Springfield	21.8	55.4

Southern Illinois

Average annual snowfall

Days	Place	Inches	Centi­metres
7.0	Belleville	11.2	28.4
5.6	Carbondale	11.4	29.0
5.4	Mt Vernon	10.4	26.4