National Weather Service United States Department of Commerce
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  Average Monthly Temperatures  
TEMPERATURE JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
DETROIT 32.3
19.2
35.2
20.8
45.9
28.6
58.7
39.1
70.3
50.2
79.7
60.2
83.7
64.4
81.4
63.2
74.4
55.5
62.0
44.0
48.6
33.9
37.2
25.3
FLINT 29.9
16.0
32.8
16.7
43.3
25.1
56.7
35.3
68.9
46.0
78.2
55.9
82.1
59.7
79.9
58.3
73.1
50.4
60.1
40.3
46.6
31.0
34.9
22.5
SAGINAW 29.5
16.4
31.8
17.3
42.3
25.7
55.8
36.1
68.6
47.7
78.5
57.7
82.2
61.2
80.0
59.4
73.3
51.6
60.2
41.4
46.2
31.8
34.7
23.1

 

  Average Monthly Precipitation  
PRECIPITATION JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
DETROIT 2.23" 2.08" 2.43" 3.26" 3.72" 3.26" 3.51" 3.26" 3.22" 2.53" 2.57" 2.25"
FLINT 1.99" 1.68" 1.97" 3.13" 3.68" 3.12" 3.41" 3.16" 2.90" 2.77" 2.27" 1.89"
SAGINAW 1.92" 1.77" 2.02" 3.19" 3.41" 3.28" 2.83" 3.85" 2.81" 2.91" 2.28" 1.85"

 

  Average Monthly Snowfall  
SNOWFALL JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
DETROIT 14.0" 12.5" 6.2" 1.5" 0.0" 0.0" 0.0" 0.0" 0.0" 0.0" 1.9" 8.9"
FLINT 15.1" 13.0" 6.6" 2.4" 0.0" 0.0" 0.0" 0.0" 0.0" 0.3" 3.3" 11.4"
SAGINAW 13.9" 11.4" 6.0" 2.4" 0.0" 0.0" 0.0" 0.0" 0.0" 0.2" 3.3" 11.8"

Last updated May 2021 using 1991-2020 Climate Normals from NCEI.