Illinois, Climate Division 3 48-Month Period Ending in July Average Temperature
Degrees Fahrenheit
1901-1940
-99
189907
50.8
-0.4
190007
50.6
-0.6
190107
51.1
-0.1
190207
50.6
-0.6
190307
51.1
-0.1
190407
50.2
-1.0
190507
49.4
-1.8
190607
49.7
-1.5
190707
49.7
-1.5
190807
50.6
-0.6
190907
51.1
-0.1
191007
51.1
-0.1
191107
51.4
0.2
191207
50.7
-0.5
191307
50.8
-0.4
191407
51.4
0.2
191507
51.1
-0.1
191607
51.6
0.4
191707
51.1
-0.1
191807
50.0
-1.2
191907
50.5
-0.7
192007
50.2
-1.0
192107
51.5
0.3
192207
52.4
1.2
192307
52.1
0.9
192407
52.2
1.0
192507
51.4
0.2
192607
50.8
-0.4
192707
50.5
-0.7
192807
50.9
-0.3
192907
50.6
-0.6
193007
51.0
-0.2
193107
51.5
0.3
193207
52.4
1.2
193307
52.7
1.5
193407
53.4
2.2
193507
53.0
1.8
193607
51.9
0.7
193707
51.8
0.6
193807
51.5
0.3
193907
51.9
0.7
194007
52.0
0.8