Illinois, Climate Division 3 24-Month Period Ending in April Average Temperature
Degrees Fahrenheit
1901-1951
-99
189704
51.4
0.1
189804
51.4
0.1
189904
50.3
-1.0
190004
50.0
-1.3
190104
51.5
0.2
190204
51.2
-0.1
190304
50.8
-0.5
190404
49.5
-1.8
190504
48.5
-2.8
190604
50.0
-1.3
190704
51.2
-0.1
190804
51.1
-0.2
190904
51.1
-0.2
191004
51.4
0.1
191104
50.9
-0.4
191204
50.0
-1.3
191304
50.4
-0.9
191404
52.1
0.8
191504
52.8
1.5
191604
51.2
-0.1
191704
50.1
-1.2
191804
49.0
-2.3
191904
50.3
-1.0
192004
51.6
0.3
192104
51.8
0.5
192204
53.3
2.0
192304
52.5
1.2
192404
51.6
0.3
192504
50.9
-0.4
192604
50.2
-1.1
192704
50.5
-0.8
192804
51.2
-0.1
192904
50.8
-0.5
193004
50.5
-0.8
193104
51.8
0.5
193204
53.8
2.5
193304
53.1
1.8
193404
52.2
0.9
193504
53.3
2.0
193604
51.2
-0.1
193704
50.6
-0.7
193804
52.7
1.4
193904
52.7
1.4
194004
52.0
0.7
194104
51.5
0.2
194204
52.9
1.6
194304
52.2
0.9
194404
50.6
-0.7
194504
51.5
0.2
194604
51.8
0.5
194704
51.0
-0.3
194804
51.3
0.0
194904
51.6
0.3
195004
51.7
0.4
195104
50.5
-0.8