September 1988 - May 1989 Illinois Divisional Average Temperature
-99
1901-2000 base period
Degrees Fahrenheit
128 years
1901-2000
1101
Northwest
1
11
Illinois
IL
40.6
0
61
40.6
1102
Northeast
2
11
Illinois
IL
41
0
63
41
1103
West
3
11
Illinois
IL
43.6
-0.2
52
43.8
1104
Central
4
11
Illinois
IL
43.2
-0.1
52
43.3
1105
East
5
11
Illinois
IL
43
0
56
43
1106
West Southwest
6
11
Illinois
IL
45.6
-0.3
42
45.9
1107
East Southeast
7
11
Illinois
IL
45.8
-0.1
45
46
1108
Southwest
8
11
Illinois
IL
48.3
-0.2
44
48.5
1109
Southeast
9
11
Illinois
IL
48.1
-0.6
37
48.6