Illinois, Climate Division 1 36-Month Period Ending in April Average Temperature
Degrees Fahrenheit
1901-2000
-99
189804
48.4
0.2
189904
47.5
-0.7
190004
47.6
-0.6
190104
47.6
-0.6
190204
48.2
0.0
190304
48.1
-0.1
190404
46.8
-1.4
190504
46.2
-2.0
190604
46.2
-2.0
190704
47.5
-0.7
190804
47.9
-0.3
190904
48.0
-0.2
191004
47.8
-0.4
191104
48.0
-0.2
191204
47.2
-1.0
191304
47.3
-0.9
191404
47.8
-0.4
191504
48.8
0.6
191604
48.2
0.0
191704
47.4
-0.8
191804
45.9
-2.3
191904
47.1
-1.1
192004
47.0
-1.2
192104
49.1
0.9
192204
49.2
1.0
192304
49.8
1.6
192404
48.9
0.7
192504
48.1
-0.1
192604
47.3
-0.9
192704
47.2
-1.0
192804
47.4
-0.8
192904
47.8
-0.4
193004
47.6
-0.6
193104
48.3
0.1
193204
49.6
1.4
193304
50.0
1.8
193404
49.8
1.6
193504
49.5
1.3
193604
48.4
0.2
193704
48.4
0.2
193804
48.0
-0.2
193904
49.5
1.3
194004
49.2
1.0
194104
49.0
0.8
194204
49.3
1.1
194304
48.8
0.6
194404
48.6
0.4
194504
48.2
0.0
194604
48.5
0.3
194704
48.5
0.3
194804
48.2
0.0
194904
48.3
0.1
195004
48.5
0.3
195104
47.6
-0.6
195204
47.2
-1.0
195304
47.3
-0.9
195404
48.9
0.7
195504
49.5
1.3
195604
49.4
1.2
195704
48.9
0.7
195804
48.4
0.2
195904
47.8
-0.4
196004
47.3
-0.9
196104
47.6
-0.6
196204
47.5
-0.7
196304
47.4
-0.8
196404
47.7
-0.5
196504
48.0
-0.2
196604
48.4
0.2
196704
48.0
-0.2
196804
47.9
-0.3
196904
47.6
-0.6
197004
47.2
-1.0
197104
47.5
-0.7
197204
47.8
-0.4
197304
48.5
0.3
197404
48.8
0.6
197504
48.3
0.1
197604
48.8
0.6
197704
47.8
-0.4
197804
47.5
-0.7
197904
46.0
-2.2
198004
46.6
-1.6
198104
47.8
-0.4
198204
47.9
-0.3
198304
48.5
0.3
198404
48.1
-0.1
198504
48.9
0.7
198604
48.2
0.0
198704
48.9
0.7
198804
49.1
0.9
198904
49.7
1.5
199004
49.2
1.0
199104
49.2
1.0
199204
49.5
1.3
199304
48.8
0.6
199404
48.2
0.0
199504
47.7
-0.5
199604
48.0
-0.2
199704
48.0
-0.2
199804
48.1
-0.1
199904
49.4
1.2
200004
50.8
2.6
200104
50.2
2.0
200204
50.2
2.0
200304
49.4
1.2
200404
50.0
1.8
200504
49.5
1.3
200604
50.3
2.1
200704
50.2
2.0
200804
50.0
1.8
200904
48.8
0.6
201004
48.6
0.4
201104
48.5
0.3
201204
50.1
1.9
201304
50.5
2.3