Illinois, Climate Division 3 December 1979 Average Temperature Rankings
1901-2000
Degrees Fahrenheit
1
33.1
28.3
4.8
104
26
1983
2015
1978
1971
top-third
2
36.4
34.3
2.1
93
37
2000
1931
1978
1975
top-third
3
42.4
41.0
1.4
89
41
1976
1931
1978
1975
top-third
1915,1954,1973
4
48.3
47.3
1.0
82
48
1976
1931
1978
1975
normal
1930,2020
5
53.3
52.5
0.8
84
46
1976
1931
1978
1975
normal
1934,1960,1987,1988
6
56.7
56.5
0.2
67
63
1976
1931
1978
1975
normal
1960
7
58.9
58.6
0.3
64
66
1976
1931
1978
1975
normal
1901,1912,1959,2022
8
59.4
59.1
0.3
70
60
1917
1931
1978
1975
normal
1908,1920,1957,1963,1970,1986
9
58.1
58.2
-0.1
50
80
1917
1931
1976
1978
normal
1942,1960,1982,1990
10
56.2
56.3
-0.1
56
74
1917
2012
1978
1977
normal
1895,1897,1910,1947
11
52.6
53.7
-1.1
22
108
1917
2012
1978
1977
bottom-third
1907
12
49.0
51.2
-2.2
6
124
1917
2012
1978
1977
bottom-tenth
18
51.5
53.0
-1.5
8
121
1904
2012
1978
1977
bottom-tenth
1912,1926,1977
24
48.9
51.2
-2.3
1
128
1979
2017
1979
1978
lowest
36
49.7
51.2
-1.5
3
125
1905
2017
1905
1978
bottom-tenth
1980
48
49.8
51.2
-1.4
2
125
1905
1934
1906
1978
bottom-tenth
1904,1906
60
50.1
51.2
-1.1
5
121
1905
1934
1907
1978
bottom-tenth
1982