Most Monthly Precipitation in Petaluma History

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

What Was the Wettest Month in Petaluma History?

According to NOAA records, the most precipitation that Petaluma, California has ever received in a single month is 19.6 inches which occurred in February 1998.

Month to date though April 23, 2024: 0.8 inches

Petaluma Most Rain in One Month

Rank	Precipitation	Month
1	19.6 inches	February 1998
2	16.6 inches	January 1916
3	16.3 inches	January 1995
4	15.8 inches	January 1914
5	15.6 inches	December 2014
6	15.5 inches	December 1955
7	15.3 inches	February 1986
8	15.0 inches	March 1983
9	13.3 inches	January 1970
10	13.1 inches	December 2005
11	12.8 inches	January 1967
12	12.6 inches	January 1978
13	12.3 inches	December 2002
14	12.0 inches	March 1995
15	11.9 inches	December 1940
16	11.9 inches	January 2017
17	11.7 inches	February 1915
18	11.7 inches	December 1952
19	11.3 inches	January 1973
20	11.3 inches	December 1931