Illinois, Climate Division 9 June-April Average Temperature
Degrees Fahrenheit
1901-1928
-99
189604
54.7
0.2
189704
54.5
0.0
189804
55.8
1.3
189904
52.5
-2.0
190004
54.6
0.1
190104
55.2
0.7
190204
53.5
-1.0
190304
55.0
0.5
190404
51.7
-2.8
190504
52.5
-2.0
190604
53.9
-0.6
190704
55.2
0.7
190804
54.4
-0.1
190904
55.4
0.9
191004
54.9
0.4
191104
54.3
-0.2
191204
53.0
-1.5
191304
54.1
-0.4
191404
55.8
1.3
191504
55.3
0.8
191604
54.1
-0.4
191704
54.5
0.0
191804
51.2
-3.3
191904
55.8
1.3
192004
54.3
-0.2
192104
56.4
1.9
192204
56.5
2.0
192304
55.5
1.0
192404
54.2
-0.3
192504
55.5
1.0
192604
54.1
-0.4
192704
55.5
1.0
192804
54.1
-0.4