Average Temperatures for Illinois in October





Average temperatures for October 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 1981 to 2010 by the US National Climatic Data Center.

Chicago Area

Average October temperatures
High °F Low °F Place High °C Low °C
62 43 Aurora 17 6
62 42 Chicago Botanical Garden 17 6
63 46 Chicago Midway Airport 17 8
62 43 Chicago O'Hare Airport 17 6
65 48 Chicago University 18 9
63 40 Elgin 17 5
64 43 Joliet 18 6

Northern Illinois

Average temperatures in October
High °F Low °F Place High °C Low °C
61 41 Antioch 16 5
62 40 DeKalb 17 5
62 40 Dixon 17 4
62 39 Freeport 17 4
64 42 Moline 18 6
63 41 Rockford 17 5
60 42 Waukegan 16 6

Central Illinois

Normal temperatures for October
High °F Low °F Place High °C Low °C
69 49 Alton 20 9
69 46 Cahokia 21 8
66 44 Danville 19 7
65 44 Peoria 18 6
65 44 Quincy 18 7
66 44 Springfield 19 7
65 43 Urbana 18 6

Southern Illinois

Average October temperatures
High °F Low °F Place High °C Low °C
70 47 Cairo 21 8
67 44 Marion 19 6
67 44 Mt Vernon 20 7
Reference

National Climatic Data Center. NOAA's 1981-2010 Climate Normals.

Illinois Temperatures
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