Illinois, Climate Division 2 60-Month Period Ending in April Average Temperature
Degrees Fahrenheit
1901-1955
-99
190004
48.5
0.2
190104
48.5
0.2
190204
48.4
0.1
190304
48.2
-0.1
190404
47.8
-0.5
190504
47.3
-1.0
190604
47.2
-1.1
190704
47.3
-1.0
190804
47.1
-1.2
190904
47.9
-0.4
191004
48.2
-0.1
191104
48.1
-0.2
191204
47.7
-0.6
191304
47.9
-0.4
191404
48.0
-0.3
191504
48.3
0.0
191604
48.0
-0.3
191704
48.1
-0.2
191804
47.4
-0.9
191904
47.5
-0.8
192004
47.1
-1.2
192104
48.0
-0.3
192204
48.6
0.3
192304
49.4
1.1
192404
49.1
0.8
192504
49.2
0.9
192604
48.3
0.0
192704
47.8
-0.5
192804
47.6
-0.7
192904
47.5
-0.8
193004
47.5
-0.8
193104
48.1
-0.2
193204
48.8
0.5
193304
49.0
0.7
193404
49.3
1.0
193504
49.9
1.6
193604
49.1
0.8
193704
48.6
0.3
193804
48.7
0.4
193904
48.7
0.4
194004
48.4
0.1
194104
49.0
0.7
194204
49.3
1.0
194304
48.9
0.6
194404
48.7
0.4
194504
48.9
0.6
194604
48.8
0.5
194704
48.3
0.0
194804
48.5
0.2
194904
48.6
0.3
195004
48.4
0.1
195104
48.1
-0.2
195204
48.0
-0.3
195304
48.1
-0.2
195404
48.6
0.3
195504
48.7
0.4