Illinois, Climate Division 9 June-May Average Temperature
Degrees Fahrenheit
1901-1997
-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