Illinois, Climate Division 9 December-June Average Temperature
Degrees Fahrenheit
1901-1956
-99
189606
50.1
1.3
189706
48.3
-0.5
189806
49.6
0.8
189906
46.2
-2.6
190006
47.5
-1.3
190106
48.0
-0.8
190206
46.7
-2.1
190306
48.2
-0.6
190406
45.1
-3.7
190506
47.1
-1.7
190606
47.8
-1.0
190706
48.5
-0.3
190806
49.8
1.0
190906
49.3
0.5
191006
47.1
-1.7
191106
50.2
1.4
191206
45.4
-3.4
191306
49.0
0.2
191406
49.7
0.9
191506
47.4
-1.4
191606
47.7
-1.1
191706
47.1
-1.7
191806
46.1
-2.7
191906
50.6
1.8
192006
46.4
-2.4
192106
52.5
3.7
192206
50.5
1.7
192306
48.4
-0.4
192406
47.5
-1.3
192506
50.5
1.7
192606
47.5
-1.3
192706
49.5
0.7
192806
47.2
-1.6
192906
48.1
-0.7
193006
49.6
0.8
193106
49.1
0.3
193206
52.2
3.4
193306
50.6
1.8
193406
50.4
1.6
193506
49.0
0.2
193606
46.4
-2.4
193706
48.9
0.1
193806
50.9
2.1
193906
49.9
1.1
194006
45.7
-3.1
194106
49.8
1.0
194206
49.5
0.7
194306
48.8
0.0
194406
50.0
1.2
194506
47.9
-0.9
194606
50.3
1.5
194706
47.4
-1.4
194806
48.2
-0.6
194906
50.4
1.6
195006
49.7
0.9
195106
46.9
-1.9
195206
50.7
1.9
195306
51.3
2.5
195406
50.7
1.9
195506
49.5
0.7
195606
48.6
-0.2