Average February Temperatures for Illinois

Average temperatures for February at cities throughout Illinois are listed below.

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

The tables give the normal maximum and minimum temperatures based on weather data collected from 1991 to 2020 by the US National Centers for Environmental Information.

Chicago Area

Average February temperatures
High °F	Low °F	Place	High °C	Low °C
35	20	Aurora	2	-7
36	19	Chicago Botanical Garden	2	-7
37	23	Chicago Midway Airport	3	-5
36	22	Chicago O'Hare Airport	2	-6
34	17	Elgin	1	-8
35	20	Joliet	2	-7
32	16	Rochelle	0	-9

Northern Illinois

Average temperatures in February
High °F	Low °F	Place	High °C	Low °C
33	18	Antioch	0	-8
33	17	DeKalb	0	-9
34	17	Dixon	1	-8
33	15	Freeport	0	-10
37	19	Moline	3	-7
33	18	Rockford	1	-8
34	18	Waukegan	1	-8

Central Illinois

Normal temperatures for February
High °F	Low °F	Place	High °C	Low °C
44	25	Alton	7	-4
36	19	Bloomington	2	-7
46	28	Cahokia	8	-2
38	21	Champaign	4	-6
43	25	Charleston	6	-4
40	23	Danville	5	-5
39	24	Decatur	4	-5
37	20	Kankakee	3	-7
35	19	Ottawa	2	-7
39	21	Peoria	4	-6
40	23	Quincy	4	-5
41	24	Springfield	5	-5

Southern Illinois

Average February temperatures
High °F	Low °F	Place	High °C	Low °C
49	28	Belleville	9	-2
48	30	Cairo	9	-1
46	26	Carbondale	8	-3
44	25	Mt Vernon	6	-4

Average Temperatures for Illinois in February

Chicago Area

Northern Illinois

Central Illinois

Southern Illinois

Reference

More Illinois Weather Information