Most Monthly Precipitation in Imperial History

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

What Was the Wettest Month in Imperial History?

According to NOAA records, the most precipitation that Imperial, California has ever received in a single month is 7.1 inches which occurred in September 1939.

Imperial Most Rain in One Month

Rank	Precipitation	Month
1	7.1 inches	September 1939
2	6.1 inches	February 1905
3	3.9 inches	August 1977
4	3.9 inches	December 1926
5	3.5 inches	January 1993
6	2.9 inches	December 1927
7	2.9 inches	October 1932
8	2.8 inches	September 1976
9	2.6 inches	October 1986
10	2.5 inches	February 1906
11	2.5 inches	December 1943
12	2.4 inches	January 2010
13	2.4 inches	December 1982
14	2.4 inches	December 1940
15	2.2 inches	August 1946
16	2.1 inches	February 1935
17	2.1 inches	September 1997
18	2.1 inches	October 2017
19	2.0 inches	October 1957
20	1.9 inches	August 1906