Most Monthly Precipitation in Sioux Falls History

This is a list of the largest monthly precipitation totals ever recorded in Sioux Falls, South Dakota history from 1932–2024.

What Was the Wettest Month in Sioux Falls History?

According to NOAA records, the most precipitation that Sioux Falls, South Dakota has ever received in a single month is 13.7 inches which occurred in June 2014.

Month to date though April 24, 2024: 2.4 inches

Sioux Falls Most Rain in One Month

Rank	Precipitation	Month
1	13.7 inches	June 2014
2	9.3 inches	August 1932
3	9.3 inches	September 1986
4	9.1 inches	August 1975
5	9.0 inches	May 1936
6	8.6 inches	July 2010
7	8.4 inches	June 1984
8	8.4 inches	July 1992
9	8.3 inches	May 1993
9	8.3 inches	August 2002
11	8.1 inches	May 2004
12	7.9 inches	June 1951
13	7.9 inches	July 1993
14	7.8 inches	June 2010
15	7.8 inches	July 1948
16	7.6 inches	September 2016
17	7.5 inches	August 1959
18	7.4 inches	August 1944
19	7.3 inches	September 2018
20	7.3 inches	June 2018