Illinois, Climate Division 7 August-March Average Temperature
Degrees Fahrenheit
1901-1995
-99
189603
45.5
-1.0
189703
45.7
-0.8
189803
47.9
1.4
189903
43.0
-3.5
190003
46.3
-0.2
190103
47.5
1.0
190203
44.2
-2.3
190303
46.6
0.1
190403
42.9
-3.6
190503
44.2
-2.3
190603
45.5
-1.0
190703
48.4
1.9
190803
46.1
-0.4
190903
47.9
1.4
191003
46.5
0.0
191103
46.3
-0.2
191203
43.0
-3.5
191303
46.4
-0.1
191403
47.4
0.9
191503
45.9
-0.6
191603
46.1
-0.4
191703
46.3
-0.2
191803
42.6
-3.9
191903
48.3
1.8
192003
45.6
-0.9
192103
49.5
3.0
192203
47.8
1.3
192303
47.5
1.0
192403
45.6
-0.9
192503
46.8
0.3
192603
45.2
-1.3
192703
47.2
0.7
192803
47.0
0.5
192903
46.1
-0.4
193003
45.4
-1.1
193103
47.5
1.0
193203
51.0
4.5
193303
46.7
0.2
193403
47.1
0.6
193503
48.5
2.0
193603
44.2
-2.3
193703
47.5
1.0
193803
47.4
0.9
193903
48.9
2.4
194003
45.4
-1.1
194103
46.8
0.3
194203
48.6
2.1
194303
46.4
-0.1
194403
46.1
-0.4
194503
47.1
0.6
194603
47.7
1.2
194703
46.2
-0.3
194803
47.4
0.9
194903
48.1
1.6
195003
47.8
1.3
195103
44.2
-2.3
195203
46.2
-0.3
195303
47.8
1.3
195403
48.8
2.3
195503
47.9
1.4
195603
46.7
0.2
195703
47.8
1.3
195803
44.7
-1.8
195903
45.8
-0.7
196003
45.0
-1.5
196103
47.4
0.9
196203
45.8
-0.7
196303
44.4
-2.1
196403
46.2
-0.3
196503
45.4
-1.1
196603
47.0
0.5
196703
46.2
-0.3
196803
44.2
-2.3
196903
45.3
-1.2
197003
43.5
-3.0
197103
46.3
-0.2
197203
48.4
1.9
197303
47.0
0.5
197403
48.5
2.0
197503
45.8
-0.7
197603
48.7
2.2
197703
41.7
-4.8
197803
42.1
-4.4
197903
44.0
-2.5
198003
45.1
-1.4
198103
46.9
0.4
198203
44.2
-2.3
198303
48.2
1.7
198403
45.6
-0.9
198503
46.7
0.2
198603
46.6
0.1
198703
47.4
0.9
198803
46.5
0.0
198903
47.3
0.8
199003
47.7
1.2
199103
48.2
1.7
199203
49.1
2.6
199303
45.5
-1.0
199403
45.2
-1.3
199503
48.3
1.8