| Average Monthly Temperatures |
| TEMPERATURE | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC |
| DETROIT |
32.0 19.1 |
35.2 21.0 |
45.8 28.6 |
59.1 39.4 |
69.9 49.4 |
79.3 59.5 |
83.4 63.9 |
81.4 62.6 |
74.0 54.7 |
61.6 43.3 |
48.8 34.3 |
36.1 24.1 |
| FLINT |
29.6 15.3 |
32.8 16.9 |
43.5 24.8 |
57.3 35.5 |
68.5 45.3 |
77.9 55.2 |
81.9 59.2 |
79.7 57.9 |
72.3 49.9 |
59.6 39.4 |
46.7 31.0 |
34.1 20.8 |
| SAGINAW |
28.9 15.6 |
31.7 17.3 |
42.2 25.3 |
56.1 36.0 |
68.0 46.6 |
77.9 56.5 |
81.8 60.2 |
79.4 58.3 |
72.1 50.5 |
59.3 40.1 |
45.9 31.2 |
33.5 21.2 |
| Average Monthly Precipitation |
| PRECIPITATION | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC |
| DETROIT | 1.96" | 2.02" | 2.28" | 2.90" | 3.38" | 3.52" | 3.37" | 3.00" | 3.27" | 2.52" | 2.79" | 2.46" |
| FLINT |
1.63" | 1.48" | 1.91" | 2.89" | 3.08" | 3.07" | 3.32" | 3.18" | 3.75" | 2.47" | 2.67" | 1.92" |
| SAGINAW |
1.71" | 1.61" | 2.06" | 2.89" | 3.38" | 2.98" | 2.58" | 3.31" | 3.83" | 2.63" | 2.70" | 1.86" |
| Average Monthly Snowfall |
| SNOWFALL | JAN | FEB | MAR | APR | MAY | JUN | JUL | AUG | SEP | OCT | NOV | DEC |
| DETROIT | 12.5" | 10.4" | 6.9" | 1.7" | Trace | 0" | 0" | 0" | 0" | 0.1" | 1.4" | 9.7" |
| FLINT |
13.1" | 10.8" | 6.5" | 2.3" | Trace | 0" | 0" | 0" | 0" | 0.4" | 2.5" | 11.8" |
| SAGINAW |
11.9" | 8.6" | 6.4" | 1.7" | Trace | 0" | 0" | 0" | 0" | 0.3" | 3.6" | 9.0" |