Illinois, Climate Division 6 May Average Temperature
Degrees Fahrenheit
1901-1980
-99
189505
63.6
0.2
189605
69.9
6.5
189705
59.9
-3.5
189805
62.8
-0.6
189905
64.5
1.1
190005
64.9
1.5
190105
62.3
-1.1
190205
68.1
4.7
190305
65.4
2.0
190405
62.6
-0.8
190505
63.8
0.4
190605
64.8
1.4
190705
57.1
-6.3
190805
63.8
0.4
190905
60.8
-2.6
191005
58.2
-5.2
191105
68.3
4.9
191205
65.7
2.3
191305
64.4
1.0
191405
65.8
2.4
191505
60.7
-2.7
191605
64.2
0.8
191705
57.3
-6.1
191805
67.5
4.1
191905
60.1
-3.3
192005
61.4
-2.0
192105
65.0
1.6
192205
66.0
2.6
192305
61.8
-1.6
192405
57.0
-6.4
192505
60.0
-3.4
192605
65.5
2.1
192705
61.7
-1.7
192805
63.9
0.5
192905
60.0
-3.4
193005
64.6
1.2
193105
59.6
-3.8
193205
64.7
1.3
193305
64.6
1.2
193405
67.8
4.4
193505
58.3
-5.1
193605
67.8
4.4
193705
64.0
0.6
193805
62.8
-0.6
193905
66.2
2.8
194005
60.6
-2.8
194105
67.3
3.9
194205
62.9
-0.5
194305
61.8
-1.6
194405
68.0
4.6
194505
58.7
-4.7
194605
60.1
-3.3
194705
60.7
-2.7
194805
62.0
-1.4
194905
66.0
2.6
195005
64.9
1.5
195105
64.9
1.5
195205
63.1
-0.3
195305
64.9
1.5
195405
59.8
-3.6
195505
65.5
2.1
195605
66.1
2.7
195705
64.0
0.6
195805
64.1
0.7
195905
67.7
4.3
196005
60.8
-2.6
196105
59.1
-4.3
196205
71.6
8.2
196305
62.8
-0.6
196405
68.1
4.7
196505
69.0
5.6
196605
59.8
-3.6
196705
59.2
-4.2
196805
60.3
-3.1
196905
63.5
0.1
197005
66.9
3.5
197105
60.1
-3.3
197205
65.1
1.7
197305
60.4
-3.0
197405
63.0
-0.4
197505
66.2
2.8
197605
60.0
-3.4
197705
69.6
6.2
197805
62.1
-1.3
197905
62.8
-0.6
198005
64.3
0.9