Detroit, Michigan weather in January

Averages from 2021–2025 (155 days of record).

Average high

32°F

Average low

21°F

Rainy days

~11 per month

Total precipitation

2.5 in

Warmest recorded

57°F

Coldest recorded

-9°F

Expect January days in Detroit, Michigan to top out around 32°F and cool to about 21°F overnight, with roughly 11 days of measurable rain across the month. In recent years January has ranged from -9°F to 57°F.