Detroit Area Average Monthly Temperatures from 1980 to 2000
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg for Year
1980
24.5
22.2
31.3
45.9
59.8
63.7
72.7
72.7
63.8
46.3
37.4
26.0
47.2
1981
19.0
28.8
36.5
49.8
55.9
68.0
72.4
70.0
60.9
47.6
41.1
27.8
48.2
1982
17.1
20.7
33.0
43.2
64.3
64.2
72.4
67.7
61.8
52.6
41.6
37.3
48.0 
1983
28.7
31.6
38.4
44.2
54.4
68.2
74.5
73.6
64.0
51.6
41.2
20.8
49.3
1984
18.0
33.3
28.9
47.8
54.5
70.8
70.7
72.7
61.2
54.9
38.6
34.0
48.8
1985
20.3
23.4
38.4
51.0
60.1
62.8
71.3
69.2
64.3
53.0
42.4
22.2
48.2
1986
23.9
24.6
37.6
50.6
61.3
67.3
75.0
68.9
65.9
52.6
37.3
31.7
49.7
1987
26.1
29.6
39.8
50.8
63.3
71.3
76.1
71.6
64.6
46.6
43.5
33.6
51.4
1988
23.8
23.4
36.9
48.5
62.0
70.4
77.1
75.1
63.3
46.0
42.2
28.7
49.8
1989
32.8
24.1
35.2
45.1
57.5
67.5
73.0
69.9
61.9
52.1
38.2
18.0
47.9
1990
33.6
30.7
39.5
49.0
56.6
68.5
72.2
71.2
64.5
52.8
44.2
32.8
51.3
1991
25.0
31.2
40.3
52.0
66.5
72.4
74.9
73.4
63.1
54.8
38.5
32.1
52.0
1992
28.3
30.8
35.5
46.3
58.3
65.5
68.8
66.7
61.4
49.7
40.5
33.2
48.8
1993
29.4
24.2
34.7
47.8
60.2
67.5
75.5
74.5
61.0
51.9
41.2
30.8
49.9
1994
17.3
23.5
37.1
51.2
58.7
72.3
74.2
69.6
66.2
53.8
45.5
35.4
50.4
1995
28.4
24.9
39.2
45.7
59.7
71.6
74.8
77.1
62.8
55.1
35.5
25.6
50.0
1996
24.3
26.0
30.8
45.2
56.7
70.7
70.6
72.9
64.1
52.0
34.1
31.5
48.2
1997
23.0
30.6
37.2
45.8
52.0
69.5
72.2
68.1
62.7
51.8
37.1
32.3
48.5
1998
32.8
36.7
39.5
50.4
65.6
69.1
73.4
73.2
68.0
53.8
43.8
35.3
53.5
1999
23.1
32.7
34.8
50.7
62.4 
70.8
76.8
70.2
65.5
51.6
45.2 
32.0
 51.3
2000 
24.6
31.9
44.0
48.0 
61.8 

69.4

70.3

 70.8

62.5 
 55.1

40.2

19.3

 49.8