Most Monthly Precipitation in Dayton History

This is a list of the largest monthly precipitation totals ever recorded in Dayton, Ohio history from 1893–2024.

What Was the Wettest Month in Dayton History?

According to NOAA records, the most precipitation that Dayton, Ohio has ever received in a single month is 11.7 inches which occurred in January 1937.

Dayton Most Rain in One Month

Rank	Precipitation	Month
1	11.7 inches	January 1937
2	10.9 inches	June 1958
3	10.8 inches	September 2011
4	10.4 inches	March 1913
5	10.0 inches	December 1990
6	9.9 inches	January 1950
7	9.5 inches	June 1980
8	9.2 inches	January 2005
9	9.2 inches	April 1996
10	9.1 inches	June 1903
11	9.1 inches	May 1938
12	9.1 inches	May 1995
13	8.9 inches	August 1905
14	8.7 inches	April 2011
15	8.7 inches	March 1945
16	8.6 inches	May 2004
17	8.6 inches	May 1989
17	8.6 inches	July 1990
19	8.4 inches	November 1897
19	8.4 inches	May 1990