Most Monthly Precipitation in St. Charles History

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

What Was the Wettest Month in St. Charles History?

According to NOAA records, the most precipitation that St. Charles, Missouri has ever received in a single month is 14.4 inches which occurred in October 2009.

Month to date though April 27, 2024: 5.9 inches

St. Charles Most Rain in One Month

Rank	Precipitation	Month
1	14.4 inches	October 2009
2	13.6 inches	August 1946
3	13.3 inches	May 1995
4	12.7 inches	December 2015
5	12.6 inches	July 2022
6	12.3 inches	June 1957
7	11.8 inches	May 1929
8	11.7 inches	August 1916
9	11.4 inches	May 1943
10	11.3 inches	November 1946
11	11.1 inches	June 1985
12	11.0 inches	April 1893
13	11.0 inches	April 1994
14	10.9 inches	August 1915
15	10.9 inches	June 2015
16	10.7 inches	March 1897
17	10.6 inches	July 1981
18	10.2 inches	September 1911
19	10.1 inches	May 2019
20	10.0 inches	April 1996