Most Monthly Precipitation in Sumter History

This is a list of the largest monthly precipitation totals ever recorded in Sumter, South Carolina history from 1901–2024.

What Was the Wettest Month in Sumter History?

According to NOAA records, the most precipitation that Sumter, South Carolina has ever received in a single month is 24.6 inches which occurred in October 2015.

Sumter Most Rain in One Month

Rank	Precipitation	Month
1	24.6 inches	October 2015
2	18.0 inches	September 1945
3	15.6 inches	July 2013
4	15.4 inches	October 1990
5	14.3 inches	June 1973
6	14.3 inches	June 1903
7	13.8 inches	July 1991
8	12.9 inches	August 1961
9	12.8 inches	July 1959
9	12.8 inches	June 1965
11	12.4 inches	June 1906
12	11.8 inches	September 2016
13	11.7 inches	June 1941
13	11.7 inches	March 1971
15	10.9 inches	September 1959
16	10.8 inches	July 1942
17	10.5 inches	June 1995
18	10.4 inches	June 1976
19	10.3 inches	August 1964
20	10.2 inches	April 1961