Illinois, Climate Division 9 July-May Average Temperature
Degrees Fahrenheit
1901-2000
-99
189605
54.2
0.4
189705
53.4
-0.4
189805
55.1
1.3
189905
51.7
-2.1
190005
53.7
-0.1
190105
54.4
0.6
190205
52.9
-0.9
190305
54.5
0.7
190405
51.4
-2.4
190505
52.1
-1.7
190605
53.0
-0.8
190705
54.0
0.2
190805
53.9
0.1
190905
54.4
0.6
191005
53.6
-0.2
191105
54.2
0.4
191205
52.1
-1.7
191305
53.8
0.0
191405
54.9
1.1
191505
53.9
0.1
191605
53.6
-0.2
191705
53.5
-0.3
191805
51.0
-2.8
191905
54.6
0.8
192005
53.2
-0.6
192105
55.8
2.0
192205
55.6
1.8
192305
54.3
0.5
192405
52.9
-0.9
192505
54.4
0.6
192605
53.2
-0.6
192705
54.8
1.0
192805
53.6
-0.2
192905
53.7
-0.1
193005
53.8
0.0
193105
54.4
0.6
193205
57.6
3.8
193305
54.3
0.5
193405
54.9
1.1
193505
55.4
1.6
193605
52.5
-1.3
193705
55.2
1.4
193805
54.8
1.0
193905
55.4
1.6
194005
52.5
-1.3
194105
54.7
0.9
194205
55.5
1.7
194305
53.8
0.0
194405
54.0
0.2
194505
53.8
0.0
194605
54.5
0.7
194705
53.1
-0.7
194805
53.9
0.1
194905
54.5
0.7
195005
54.4
0.6
195105
51.6
-2.2
195205
53.5
-0.3
195305
54.5
0.7
195405
55.3
1.5
195505
55.6
1.8
195605
54.1
0.3
195705
54.8
1.0
195805
52.1
-1.7
195905
53.5
-0.3
196005
52.3
-1.5
196105
52.9
-0.9
196205
53.6
-0.2
196305
52.3
-1.5
196405
53.8
0.0
196505
53.6
-0.2
196605
53.2
-0.6
196705
53.8
0.0
196805
51.3
-2.5
196905
52.8
-1.0
197005
52.1
-1.7
197105
53.1
-0.7
197205
54.9
1.1
197305
53.1
-0.7
197405
55.5
1.7
197505
53.1
-0.7
197605
54.5
0.7
197705
50.9
-2.9
197805
51.0
-2.8
197905
51.7
-2.1
198005
52.2
-1.6
198105
54.5
0.7
198205
52.3
-1.5
198305
53.6
-0.2
198405
52.6
-1.2
198505
53.8
0.0
198605
54.2
0.4
198705
54.8
1.0
198805
53.7
-0.1
198905
53.6
-0.2
199005
53.7
-0.1
199105
55.4
1.6
199205
55.1
1.3
199305
52.4
-1.4
199405
52.9
-0.9
199505
54.5
0.7
199605
52.8
-1.0
199705
52.6
-1.2
199805
55.0
1.2
199905
55.9
2.1
200005
56.2
2.4
200105
53.1
-0.7
200205
55.5
1.7
200305
54.2
0.4
200405
55.2
1.4
200505
54.7
0.9