Everything below is collected in one spot so you do not have to cross-check Detroit climate: monthly averages by hand. The gap between Jan and Jul is 27.1 C here: -4.7 C against 22.4 C. No month dominates: the wettest is May at 3.13 mm/day, the driest Jan at 1.69 mm/day. Taken together that is roughly 846 mm of rain a year for the grid cell. The same build that regenerates the sitemap refreshes these values, and unchanged pages are left untouched. Exact monthly values are in the table; links below cover adjacent locations and years.
Annual mean temperature 9.2 C
Warmest month Jul (22.4 C)
Coldest month Jan (-4.7 C)
Wettest month May (3.13 mm/day)
All-time record high 36.6 C
All-time record low -27.4 C
Annual precipitation 847 mm / year
Coordinates 42.33143, -83.04575
Population 645,705
Average monthly temperature and rainfall in Detroit
Month
Mean temp (C)
Rain (mm/day)
Record high (C)
Record low (C)
Jan
-4.7
1.69
14.1
-24.8
Feb
-4.0
1.85
18.3
-27.4
Mar
1.3
1.81
27.2
-21.3
Apr
7.6
2.55
25.5
-13.6
May
14.1
3.13
31.1
-3.2
Jun
19.5
2.79
33.6
3.3
Jul
22.4
2.74
36.0
7.2
Aug
21.8
2.63
36.6
8.7
Sep
18.0
2.48
33.6
3.5
Oct
10.8
2.31
30.6
-2.9
Nov
4.2
2.08
22.9
-11.8
Dec
-1.5
1.78
17.0
-18.5
What the Detroit climate table shows
Values are multi-decadal climatological averages for the 42.33143, -83.04575 grid cell, not a single year. Rain is the daily mean, so a value of 2.00 mm/day is about 60 mm across a 30-day month. Averages smooth over extremes, so use them for planning rather than for what to pack for next Tuesday.
Frequently asked questions
How much rain is 3.13 mm/day in a month?
Rain is recorded as a daily mean, so 3.13 mm/day is roughly 95 mm across a 30-day month.
Does Detroit get the same every year?
Close to it. Averaging decades smooths variation, so treat these as typical rather than guaranteed.