Illinois, Climate Division 7 April 2009 Average Temperature Rankings
1901-2000
Degrees Fahrenheit
1
53.4
52.8
0.6
67
63
1907
2010
2008
2006
normal
1931,2021
2
50.0
47.2
2.8
102
28
1926
2012
2008
2007
top-third
2011
3
44.7
42.0
2.7
108
22
1978
2012
2008
2006
top-third
2004,2006
4
39.4
38.4
1.0
76
54
1978
2012
2008
2007
normal
5
37.6
37.1
0.5
70
59
1978
2012
2008
2007
normal
1898,1997
6
38.3
37.9
0.4
67
62
1978
2012
2008
2007
normal
1941
7
40.8
40.5
0.3
69
60
1978
2012
2003
2008
normal
1927,1952,1966,1973,2013
8
44.3
43.8
0.5
72
57
1904,1918,1978
2017
2003
2008
normal
1907,1973
9
47.4
47.2
0.2
65
64
1918
2017
2001
2008
normal
1933,1966,2010
10
50.2
50.1
0.1
59
70
1918
2012
2001
2008
normal
1917,1988
11
52.4
52.2
0.2
64
65
1904,1918
2012
2001
2008
normal
1901,1925
12
53.0
53.1
-0.1
53
76
1918
2012
2001
2008
normal
1965,1967,1971,2010
18
48.1
48.0
0.1
56
72
1905,1979
2017
1997
2008
normal
1898,1910,1940,1966,1981,1993,2010
24
53.9
53.1
0.8
94
34
1978
2017
2004
2008
top-third
1934,2002,2019
36
53.9
53.0
0.9
95
32
1979
2018
2005
2008
top-third
1921,1988,1991,1993,2005
48
54.3
53.0
1.3
107
19
1980
2019
2006
2008
top-third
2006
60
54.4
53.0
1.4
114
11
1981
2020
2007
2008
top-tenth
2013,2019