Most Monthly Precipitation in Watertown History

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

What Was the Wettest Month in Watertown History?

According to NOAA records, the most precipitation that Watertown, South Dakota has ever received in a single month is 11.4 inches which occurred in June 1991.

Month to date though April 23, 2024: 2.7 inches

Watertown Most Rain in One Month

Rank	Precipitation	Month
1	11.4 inches	June 1991
2	10.4 inches	July 1963
3	9.0 inches	June 1914
4	8.8 inches	May 1962
5	8.3 inches	June 1977
6	8.3 inches	May 1972
7	8.2 inches	May 1931
8	8.2 inches	June 1953
9	8.1 inches	October 1971
10	7.8 inches	July 1953
11	7.8 inches	June 1897
12	7.7 inches	August 1900
13	7.6 inches	October 2021
14	7.5 inches	June 1994
15	7.4 inches	August 1916
16	7.3 inches	June 1925
17	7.2 inches	September 1921
18	7.2 inches	June 1992
19	7.0 inches	August 2016
20	6.9 inches	July 2019