September 2017 - May 2018 Illinois Divisional Average Temperature
-99
1901-2000 base period
Degrees Fahrenheit
128 years
1901-2000
1101
Northwest
1
11
Illinois
IL
41.4
0.9
85
40.6
1102
Northeast
2
11
Illinois
IL
41.9
0.9
91
41
1103
West
3
11
Illinois
IL
44.5
0.8
85
43.8
1104
Central
4
11
Illinois
IL
44.8
1.4
102
43.3
1105
East
5
11
Illinois
IL
44.2
1.2
96
43
1106
West Southwest
6
11
Illinois
IL
47.2
1.3
101
45.9
1107
East Southeast
7
11
Illinois
IL
47.2
1.3
98
46
1108
Southwest
8
11
Illinois
IL
49.6
1.1
95
48.5
1109
Southeast
9
11
Illinois
IL
49.5
0.9
89
48.6