Illinois, Climate Division 5 January-July Average Temperature
Degrees Fahrenheit
1901-2000
-99
189507
46.6
-2.7
189607
50.8
1.5
189707
48.1
-1.2
189807
50.3
1.0
189907
47.1
-2.2
190007
47.9
-1.4
190107
48.2
-1.1
190207
47.3
-2.0
190307
48.7
-0.6
190407
45.0
-4.3
190507
46.9
-2.4
190607
48.5
-0.8
190707
47.6
-1.7
190807
49.5
0.2
190907
48.6
-0.7
191007
49.1
-0.2
191107
51.2
1.9
191207
44.7
-4.6
191307
49.4
0.1
191407
49.7
0.4
191507
48.3
-1.0
191607
48.6
-0.7
191707
46.6
-2.7
191807
47.6
-1.7
191907
51.0
1.7
192007
47.0
-2.3
192107
54.5
5.2
192207
50.3
1.0
192307
48.6
-0.7
192407
46.1
-3.2
192507
50.8
1.5
192607
47.7
-1.6
192707
49.6
0.3
192807
48.4
-0.9
192907
48.1
-1.2
193007
50.7
1.4
193107
51.3
2.0
193207
51.4
2.1
193307
52.2
2.9
193407
51.4
2.1
193507
49.4
0.1
193607
48.1
-1.2
193707
48.5
-0.8
193807
51.6
2.3
193907
50.6
1.3
194007
46.8
-2.5
194107
50.0
0.7
194207
50.4
1.1
194307
49.4
0.1
194407
50.9
1.6
194507
49.2
-0.1
194607
51.7
2.4
194707
46.8
-2.5
194807
49.0
-0.3
194907
51.4
2.1
195007
48.5
-0.8
195107
48.5
-0.8
195207
51.5
2.2
195307
51.6
2.3
195407
52.1
2.8
195507
51.0
1.7
195607
49.9
0.6
195707
49.5
0.2
195807
47.2
-2.1
195907
49.5
0.2
196007
46.7
-2.6
196107
48.6
-0.7
196207
48.4
-0.9
196307
47.3
-2.0
196407
51.0
1.7
196507
48.8
-0.5
196607
48.4
-0.9
196707
48.9
-0.4
196807
48.6
-0.7
196907
48.4
-0.9
197007
48.1
-1.2
197107
48.4
-0.9
197207
48.2
-1.1
197307
51.2
1.9
197407
50.1
0.8
197507
49.3
0.0
197607
50.8
1.5
197707
49.9
0.6
197807
45.3
-4.0
197907
45.2
-4.1
198007
48.2
-1.1
198107
49.9
0.6
198207
46.5
-2.8
198307
50.7
1.4
198407
48.2
-1.1
198507
49.3
0.0
198607
51.6
2.3
198707
52.9
3.6
198807
50.2
0.9
198907
49.6
0.3
199007
52.2
2.9
199107
53.1
3.8
199207
50.8
1.5
199307
49.2
-0.1
199407
48.5
-0.8
199507
50.2
0.9
199607
47.8
-1.5
199707
48.4
-0.9
199807
53.3
4.0
199907
51.6
2.3
200007
51.4
2.1
200107
50.6
1.3
200207
51.7
2.4
200307
48.3
-1.0
200407
50.7
1.4
200507
51.8
2.5
200607
52.9
3.6
200707
50.4
1.1
200807
48.9
-0.4
200907
49.1
-0.2
201007
51.2
1.9
201107
50.5
1.2
201207
55.9
6.6