Illinois, Climate Division 8 October-May Average Temperature
Degrees Fahrenheit
189605
46.4
189705
45.3
189805
46.8
189905
42.3
190005
45.8
190105
45.6
190205
43.9
190305
47.0
190405
42.7
190505
44.3
190605
45.1
190705
45.6
190805
46.5
190905
46.5
191005
45.8
191105
46.6
191205
42.5
191305
45.7
191405
46.5
191505
45.4
191605
46.3
191705
45.0
191805
42.7
191905
47.7
192005
44.2
192105
48.9
192205
47.0
192305
46.3
192405
44.7
192505
47.7
192605
44.0
192705
46.2
192805
46.0
192905
45.7
193005
46.0
193105
45.8
193205
50.3
193305
46.2
193405
46.6
193505
47.3
193605
43.7
193705
45.4
193805
47.2
193905
47.9
194005
43.6
194105
47.2
194205
47.4
194305
46.1
194405
45.9
194505
45.9
194605
47.4
194705
45.9
194805
46.1
194905
46.7
195005
47.3
195105
44.5
195205
46.3
195305
47.1
195405
47.7
195505
47.6
195605
45.6
195705
47.5
195805
44.1
195905
46.2
196005
43.8
196105
44.8
196205
45.7
196305
44.9
196405
47.0
196505
46.0
196605
46.0
196705
46.9
196805
44.5
196905
44.8
197005
44.2
197105
44.9
197205
48.1
197305
45.3
197405
48.1
197505
46.1
197605
48.1
197705
43.5
197805
41.9
197905
42.6
198005
44.6
198105
46.1
198205
44.6
198305
46.5
198405
43.7
198505
46.7
198605
47.4
198705
47.4
198805
45.9
198905
45.7
199005
46.8
199105
48.6
199205
48.0
199305
45.0
199405
45.1
199505
47.9
199605
44.9
199705
45.1
199805
48.2
199905
48.6
200005
49.6
200105
45.5
200205
48.3
200305
45.3
200405
48.4
200505
48.4
200605
48.7
200705
47.9
200805
46.4
200905
46.3
201005
46.4
201105
46.4
201205
51.8
201305
46.4
201405
43.9
201505
45.3
201605
49.9
201705
50.7
201805
47.0
201905
46.7