Most Monthly Precipitation in Detroit History

This is a list of the largest monthly precipitation totals ever recorded in Detroit, Michigan history from 1896–2024.

What Was the Wettest Month in Detroit History?

According to NOAA records, the most precipitation that Detroit, Michigan has ever received in a single month is 8.5 inches which occurred in May 2004.

Detroit Most Rain in One Month

Rank	Precipitation	Month
1	8.5 inches	May 2004
2	8.2 inches	June 1940
3	7.8 inches	August 1975
4	7.8 inches	October 1954
5	7.7 inches	August 1964
6	7.7 inches	May 1943
7	7.7 inches	July 2011
8	7.5 inches	September 1986
9	7.4 inches	May 1945
10	7.3 inches	August 1961
11	7.0 inches	June 1987
12	6.9 inches	August 1965
13	6.9 inches	August 1987
14	6.8 inches	August 1940
15	6.8 inches	October 2001
16	6.7 inches	July 1915
17	6.7 inches	September 2000
18	6.6 inches	August 2007
19	6.6 inches	June 1960
20	6.5 inches	September 1912
20	6.5 inches	August 1956