Most Monthly Precipitation in Thermopolis History

This is a list of the largest monthly precipitation totals ever recorded in Thermopolis, Wyoming history from 1899–2024.

What Was the Wettest Month in Thermopolis History?

According to NOAA records, the most precipitation that Thermopolis, Wyoming has ever received in a single month is 8.3 inches which occurred in April 1904.

Month to date though April 21, 2024: 0.3 inches

Thermopolis Most Rain in One Month

Rank	Precipitation	Month
1	8.3 inches	April 1904
2	7.1 inches	September 1923
3	6.0 inches	May 1906
4	5.8 inches	July 1903
5	5.8 inches	May 1904
6	5.8 inches	May 1908
7	5.8 inches	April 1922
8	5.7 inches	May 2010
9	5.7 inches	June 1963
10	5.3 inches	April 1900
11	5.1 inches	May 1917
12	5.0 inches	May 2005
13	4.6 inches	June 1915
14	4.6 inches	April 1914
15	4.5 inches	May 2011
16	4.5 inches	May 1926
17	4.2 inches	April 1999
17	4.2 inches	May 1930
19	4.2 inches	March 1904
20	4.2 inches	August 1930