Illinois August-November Average Temperature
Degrees Fahrenheit
1901-1942
-99
189511
57.2
-1.7
189611
56.6
-2.3
189711
60.5
1.6
189811
57.4
-1.5
189911
60.8
1.9
190011
61.8
2.9
190111
58.0
-0.9
190211
58.8
-0.1
190311
56.7
-2.2
190411
57.7
-1.2
190511
58.6
-0.3
190611
59.2
0.3
190711
56.6
-2.3
190811
59.6
0.7
190911
59.8
0.9
191011
57.6
-1.3
191111
57.2
-1.7
191211
58.7
-0.2
191311
60.6
1.7
191411
60.2
1.3
191511
58.5
-0.4
191611
59.2
0.3
191711
55.6
-3.3
191811
58.6
-0.3
191911
59.2
0.3
192011
59.4
0.5
192111
59.6
0.7
192211
60.8
1.9
192311
57.7
-1.2
192411
58.6
-0.3
192511
57.2
-1.7
192611
57.5
-1.4
192711
59.8
0.9
192811
58.5
-0.4
192911
56.3
-2.6
193011
59.4
0.5
193111
63.2
4.3
193211
56.8
-2.1
193311
59.3
0.4
193411
60.1
1.2
193511
58.6
-0.3
193611
60.3
1.4
193711
57.8
-1.1
193811
61.6
2.7
193911
60.0
1.1
194011
59.1
0.2
194111
61.1
2.2
194211
58.6
-0.3