Most Monthly Precipitation in Riverton History

This is a list of the largest monthly precipitation totals ever recorded in Riverton, Wyoming history from 1907–2024.

What Was the Wettest Month in Riverton History?

According to NOAA records, the most precipitation that Riverton, Wyoming has ever received in a single month is 6.2 inches which occurred in May 1921.

Month to date though April 25, 2024: 0.4 inches

Riverton Most Rain in One Month

Rank	Precipitation	Month
1	6.2 inches	May 1921
2	6.0 inches	June 1993
3	5.7 inches	September 1923
4	5.3 inches	May 2011
5	5.1 inches	August 1912
6	5.1 inches	October 1912
7	4.8 inches	May 2008
8	4.7 inches	April 2017
9	4.6 inches	May 1924
10	4.6 inches	June 1947
11	4.5 inches	September 1973
12	4.4 inches	May 1978
13	4.4 inches	May 1971
14	4.3 inches	June 2023
15	4.3 inches	May 1908
16	4.2 inches	May 1957
17	4.0 inches	May 2015
18	4.0 inches	May 1942
19	4.0 inches	June 1963
20	3.9 inches	May 1935