Most Monthly Precipitation in St. Louis History

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

What Was the Wettest Month in St. Louis History?

According to NOAA records, the most precipitation that St. Louis, Missouri has ever received in a single month is 14.8 inches which occurred in August 1946.

Month to date though April 26, 2024: 6.7 inches

St. Louis Most Rain in One Month

Rank	Precipitation	Month
1	14.8 inches	August 1946
2	13.1 inches	June 2015
3	12.9 inches	May 1995
4	12.7 inches	July 1948
5	12.4 inches	October 2009
6	12.4 inches	June 2003
7	12.2 inches	July 2022
8	11.7 inches	December 2015
9	11.4 inches	August 1915
10	11.2 inches	May 1943
11	10.8 inches	May 2008
11	10.8 inches	April 1893
13	10.7 inches	July 1981
14	10.7 inches	August 1916
15	10.5 inches	June 1957
16	10.4 inches	April 2017
17	10.3 inches	April 1994
18	10.1 inches	May 1929
19	10.0 inches	September 1945
20	10.0 inches	November 1985