Illinois, Climate Division 9 June-May Average Temperature
Degrees Fahrenheit
1901-2000
-99
189605
56.0
0.6
189705
55.0
-0.4
189805
56.7
1.3
189905
53.7
-1.7
190005
55.6
0.2
190105
55.9
0.5
190205
54.9
-0.5
190305
56.0
0.6
190405
52.8
-2.6
190505
53.7
-1.7
190605
54.9
-0.5
190705
55.6
0.2
190805
55.3
-0.1
190905
56.0
0.6
191005
55.4
0.0
191105
55.6
0.2
191205
54.2
-1.2
191305
55.1
-0.3
191405
56.7
1.3
191505
56.1
0.7
191605
55.2
-0.2
191705
54.9
-0.5
191805
52.7
-2.7
191905
56.3
0.9
192005
55.1
-0.3
192105
57.2
1.8
192205
57.5
2.1
192305
56.2
0.8
192405
54.6
-0.8
192505
56.0
0.6
192605
55.2
-0.2
192705
56.3
0.9
192805
55.0
-0.4
192905
55.0
-0.4
193005
55.3
-0.1
193105
56.0
0.6
193205
59.2
3.8
193305
56.1
0.7
193405
56.9
1.5
193505
57.4
2.0
193605
54.0
-1.4
193705
56.9
1.5
193805
56.4
1.0
193905
56.8
1.4
194005
54.3
-1.1
194105
56.3
0.9
194205
57.2
1.8
194305
55.5
0.1
194405
55.9
0.5
194505
55.8
0.4
194605
55.8
0.4
194705
54.9
-0.5
194805
55.5
0.1
194905
56.2
0.8
195005
56.1
0.7
195105
53.3
-2.1
195205
55.1
-0.3
195305
56.7
1.3
195405
57.3
1.9
195505
57.4
2.0
195605
55.4
0.0
195705
56.4
1.0
195805
53.9
-1.5
195905
55.0
-0.4
196005
54.1
-1.3
196105
54.5
-0.9
196205
55.0
-0.4
196305
54.0
-1.4
196405
55.6
0.2
196505
55.4
0.0
196605
54.9
-0.5
196705
55.4
0.0
196805
53.1
-2.3
196905
54.6
-0.8
197005
53.8
-1.6
197105
54.7
-0.7
197205
56.7
1.3
197305
54.6
-0.8
197405
57.1
1.7
197505
54.5
-0.9
197605
56.2
0.8
197705
52.6
-2.8
197805
52.9
-2.5
197905
53.6
-1.8
198005
54.0
-1.4
198105
56.1
0.7
198205
54.2
-1.2
198305
55.0
-0.4
198405
54.3
-1.1
198505
55.7
0.3
198605
55.7
0.3
198705
56.6
1.2
198805
55.5
0.1
198905
55.4
0.0
199005
55.2
-0.2
199105
57.0
1.6
199205
56.9
1.5
199305
53.9
-1.5
199405
54.6
-0.8
199505
56.3
0.9
199605
54.5
-0.9
199705
54.3
-1.1
199805
56.4
1.0
199905
57.5
2.1
200005
57.7
2.3
200105
54.8
-0.6
200205
56.9
1.5
200305
56.1
0.7
200405
56.4
1.0
200505
56.3
0.9
200605
57.7
2.3
200705
56.4
1.0
200805
56.4
1.0
200905
55.7
0.3
201005
55.4
0.0
201105
56.6
1.2
201205
59.6
4.2
201305
56.2
0.8
201405
53.8
-1.6