Illinois, Climate Division 4 April Average Temperature
Degrees Fahrenheit
1901-1956
-99
189504
53.1
2.8
189604
57.3
7.0
189704
48.4
-1.9
189804
47.9
-2.4
189904
51.7
1.4
190004
51.2
0.9
190104
48.3
-2.0
190204
48.6
-1.7
190304
50.5
0.2
190404
44.4
-5.9
190504
50.0
-0.3
190604
53.6
3.3
190704
42.3
-8.0
190804
50.5
0.2
190904
48.4
-1.9
191004
51.5
1.2
191104
47.8
-2.5
191204
51.8
1.5
191304
50.6
0.3
191404
51.2
0.9
191504
57.4
7.1
191604
49.1
-1.2
191704
47.5
-2.8
191804
45.0
-5.3
191904
51.2
0.9
192004
44.1
-6.2
192104
53.7
3.4
192204
51.5
1.2
192304
49.2
-1.1
192404
52.8
2.5
192504
57.0
6.7
192604
43.9
-6.4
192704
50.6
0.3
192804
46.5
-3.8
192904
52.9
2.6
193004
54.0
3.7
193104
51.6
1.3
193204
51.1
0.8
193304
50.3
0.0
193404
51.5
1.2
193504
47.7
-2.6
193604
47.4
-2.9
193704
49.4
-0.9
193804
52.2
1.9
193904
47.3
-3.0
194004
48.8
-1.5
194104
55.2
4.9
194204
55.0
4.7
194304
48.9
-1.4
194404
47.8
-2.5
194504
51.8
1.5
194604
53.8
3.5
194704
49.9
-0.4
194804
55.1
4.8
194904
50.1
-0.2
195004
44.5
-5.8
195104
47.5
-2.8
195204
51.8
1.5
195304
47.0
-3.3
195404
55.9
5.6
195504
58.1
7.8
195604
49.1
-1.2