Illinois, Climate Division 5 May 2017 Average Temperature Rankings
1901-2000
Degrees Fahrenheit
1
60.5
61.0
-0.5
53
77
1907
2018
2008
2016
normal
2
58.1
55.5
2.6
109
21
1907
1977
2016
2015
top-third
1970,2006,2007
3
52.5
49.7
2.8
114
16
1960
2012
2015
2016
top-third
1896,1938
4
49.4
44.2
5.2
127
3
1978
2012
2016
2012
top-tenth
5
45.8
40.1
5.7
128
2
1978
2012
2016
2012
top-tenth
6
42.8
38.1
4.7
125
4
1904,1978
2012
2015
2016
top-tenth
1921
7
43.4
38.3
5.1
127
2
1904
2012
2016
2012
top-tenth
8
45.4
40.2
5.2
127
2
1904
2012
2016
2012
top-tenth
9
48.2
43.0
5.2
127
2
1904
2012
2016
2012
top-tenth
10
50.8
45.9
4.9
127
2
1904
2012
2016
2012
top-tenth
11
53.0
48.5
4.5
127
2
1904
2012
2016
2012
top-tenth
12
54.7
50.3
4.4
127
2
1904
2012
2016
2012
top-tenth
18
50.7
46.2
4.5
127
1
1905
2017
2016
2017
highest
24
54.1
50.3
3.8
127
1
1905
2017
2016
2017
highest
36
52.5
50.3
2.2
123
4
1905,1906
2018
2016
2013
top-tenth
48
51.5
50.3
1.2
103
23
1905
2019
2016
2014
top-third
1933,1988,1991,2014
60
51.5
50.3
1.2
105
20
1905,1906,1908
2020
2016
2016
top-third
1934,2000,2010,2016