Illinois, Climate Division 3 August-March Average Temperature
Degrees Fahrenheit
1901-1929
-99
189603
43.8
-0.2
189703
43.4
-0.6
189803
45.4
1.4
189903
40.5
-3.5
190003
44.0
0.0
190103
45.1
1.1
190203
42.4
-1.6
190303
43.8
-0.2
190403
40.5
-3.5
190503
41.9
-2.1
190603
43.7
-0.3
190703
45.8
1.8
190803
44.6
0.6
190903
45.3
1.3
191003
44.6
0.6
191103
44.3
0.3
191203
40.0
-4.0
191303
44.2
0.2
191403
46.1
2.1
191503
44.1
0.1
191603
43.6
-0.4
191703
43.4
-0.6
191803
40.7
-3.3
191903
46.4
2.4
192003
43.0
-1.0
192103
47.8
3.8
192203
45.4
1.4
192303
45.1
1.1
192403
43.6
-0.4
192503
44.2
0.2
192603
42.9
-1.1
192703
44.5
0.5
192803
45.4
1.4
192903
43.4
-0.6