Illinois, Climate Division 2 January-April Average Temperature
Degrees Fahrenheit
1901-2000
-99
189504
27.3
-5.2
189604
34.1
1.6
189704
32.2
-0.3
189804
34.2
1.7
189904
29.4
-3.1
190004
30.7
-1.8
190104
29.4
-3.1
190204
31.3
-1.2
190304
33.4
0.9
190404
26.3
-6.2
190504
29.1
-3.4
190604
32.6
0.1
190704
32.5
0.0
190804
33.5
1.0
190904
33.1
0.6
191004
34.1
1.6
191104
33.8
1.3
191204
24.7
-7.8
191304
31.9
-0.6
191404
31.8
-0.7
191504
34.0
1.5
191604
31.3
-1.2
191704
29.4
-3.1
191804
29.2
-3.3
191904
34.7
2.2
192004
29.2
-3.3
192104
39.0
6.5
192204
33.4
0.9
192304
30.6
-1.9
192404
30.1
-2.4
192504
35.1
2.6
192604
30.5
-2.0
192704
35.0
2.5
192804
32.9
0.4
192904
30.6
-1.9
193004
33.6
1.1
193104
35.8
3.3
193204
34.2
1.7
193304
34.4
1.9
193404
32.3
-0.2
193504
33.7
1.2
193604
26.9
-5.6
193704
31.0
-1.5
193804
36.5
4.0
193904
33.4
0.9
194004
28.7
-3.8
194104
32.7
0.2
194204
34.1
1.6
194304
31.0
-1.5
194404
32.8
0.3
194504
34.9
2.4
194604
37.0
4.5
194704
30.4
-2.1
194804
31.8
-0.7
194904
33.1
0.6
195004
30.7
-1.8
195104
30.9
-1.6
195204
34.3
1.8
195304
34.3
1.8
195404
35.9
3.4
195504
34.2
1.7
195604
32.9
0.4
195704
32.4
-0.1
195804
30.5
-2.0
195904
30.4
-2.1
196004
30.4
-2.1
196104
33.3
0.8
196204
29.4
-3.1
196304
29.3
-3.2
196404
34.3
1.8
196504
30.0
-2.5
196604
31.3
-1.2
196704
32.7
0.2
196804
33.7
1.2
196904
31.7
-0.8
197004
30.0
-2.5
197104
30.6
-1.9
197204
29.7
-2.8
197304
36.4
3.9
197404
34.2
1.7
197504
31.3
-1.2
197604
35.5
3.0
197704
32.3
-0.2
197804
27.0
-5.5
197904
25.8
-6.7
198004
30.4
-2.1
198104
34.9
2.4
198204
27.6
-4.9
198304
35.1
2.6
198404
31.9
-0.6
198504
32.5
0.0
198604
35.0
2.5
198704
37.2
4.7
198804
31.6
-0.9
198904
33.0
0.5
199004
38.3
5.8
199104
35.4
2.9
199204
36.2
3.7
199304
32.2
-0.3
199404
31.0
-1.5
199504
33.1
0.6
199604
30.9
-1.6
199704
32.3
-0.2
199804
38.5
6.0
199904
34.9
2.4
200004
37.1
4.6
200104
34.1
1.6
200204
36.5
4.0
200304
32.3
-0.2
200404
34.8
2.3
200504
36.0
3.5
200604
38.4
5.9
200704
33.3
0.8
200804
32.0
-0.5
200904
32.2
-0.3
201004
35.2
2.7
201104
32.4
-0.1
201204
40.7
8.2
201304
31.9
-0.6
201404
26.3
-6.2
201504
30.0
-2.5
201604
36.3
3.8