Illinois, Climate Division 2 March 1999 Average Temperature Rankings
1901-2000
Degrees Fahrenheit
1
35.2
35.9
-0.7
60
70
1960
2012
1996
1998
normal
1955
2
34.5
30.4
4.1
110
20
1912
2012
1997
1998
top-third
3
29.7
27.3
2.4
96
34
1912
2012
1997
1998
top-third
1991
4
30.7
27.0
3.7
114
15
2014
2012
1997
1998
top-third
5
33.2
29.2
4.0
118
11
1912
2012
1997
1998
top-tenth
6
36.7
33.0
3.7
119
10
1912
2012
1997
1998
top-tenth
7
41.2
37.4
3.8
122
7
1912
2012
1998
1932
top-tenth
2000
8
45.2
41.6
3.6
122
7
1904
2012
1998
1932
top-tenth
9
48.3
45.1
3.2
122
7
1904
2012
1998
1932
top-tenth
2006
10
50.4
47.5
2.9
121
8
1904
2012
1998
1932
top-tenth
11
51.7
48.5
3.2
124
5
1918
2012
1998
1932
top-tenth
2000,2002
12
51.6
48.5
3.1
124
5
1918
2012
1998
1992
top-tenth
1932,1992,2000,2006
18
46.8
43.3
3.5
125
3
1905
2017
1998
1999
top-tenth
24
50.6
48.5
2.1
118
10
1905
2017
1998
1932
top-tenth
36
49.5
48.4
1.1
99
28
1905,1906,1918
2018
1998
1992
top-third
1935,1991,2020
48
49.2
48.4
0.8
91
35
1906
2002
1998
1993
top-third
1942
60
49.4
48.4
1.0
97
28
1906,1908
2002,2020
1998
1993
top-third
1923,1993