Detroit Area Average Monthly Temperatures from 1920 to 1940
Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Avg for Year
1920
16.9
22.7
37.7
41.0
56.5
69.1
69.7
69.5
65.7
59.5
39.1
32.8
48.4
1921
30.5
30.4
42.5
53.2
61.7
71.4
79.0
70.5
69.5
52.5
38.9
30.7
52.6
1922
23.8
28.5
36.9
48.1
62.9
69.3
72.7
70.9
67.1
54.7
42.7
29.2
50.6
1923
27.0
21.6
31.6
45.2
55.7
71.3
72.7
69.3
64.0
51.9
40.4
37.7
49.0
1924
21.8
25.5
33.7
46.0
52.2
65.6
69.9
70.7
59.4
57.4
39.8
23.2
47.1
1925
22.5
30.8
37.3
51.4
54.7
70.6
71.0
72.1
66.1
44.5
38.1
27.0
48.8
1926
25.4
25.8
29.0
41.0
57.9
63.4
72.4
72.0
62.9
50.6
38.2
25.9
47.0
1927
24.4
31.9
40.0
46.2
56.4
63.6
71.6
66.7
67.2
56.7
43.5
30.5
49.9
1928
26.4
27.0
33.7
43.7
58.3
63.4
73.6
73.2
60.8
55.4
42.5
32.9
49.2
1929
21.8
23.2
41.7
49.8
56.3
65.9
73.2
69.0
64.9
51.5
36.9
27.1
48.4
1930
22.9
33.8
34.4
47.6
61.0
70.5
74.7
73.5
66.3
51.6
42.0
29.6
50.7
1931
28.4
32.9
34.1
48.6
58.4
69.6
77.6
73.3
69.8
57.5
47.9
37.2
53.0
1932
36.7
33.0
29.8
44.3
59.7
70.3
73.0
73.7
64.9
52.9
37.2
29.5
50.4
1933
34.7
27.4
34.0
47.3
60.3
74.6
75.4
72.0
68.5
52.2
36.0
29.8
51.0
1934
30.0
14.8
29.3
44.1
61.6
73.2
75.6
69.2
66.4
52.2
43.6
26.0
48.8
1935
24.8
24.4
39.2
44.4
52.6
64.6
76.2
71.6
61.9
51.4
39.9
25.0
48.0
1936
21.7
16.1
37.6
42.3
62.8
65.9
74.7
73.1
66.3
51.2
35.4
32.2
48.3
1937
29.7
28.2
31.0
44.8
57.9
67.1
72.9
74.0
61.9
48.8
38.5
26.4
48.4
1938
24.3
31.2
41.6
48.2
58.5
67.6
74.0
74.9
61.8
55.1
42.7
30.3
50.9
1939
27.8
26.9
33.5
44.2
61.4
70.2
73.4
73.1
65.9
52.9
38.9
33.5
50.1
1940
19.0
26.7
28.7
42.8
55.7
67.6
73.4
70.5
62.8
52.2
38.0
32.1
47.5