Most Monthly Precipitation in San Francisco History

This is a list of the largest monthly precipitation totals ever recorded in San Francisco, California history from 1921–2024.

What Was the Wettest Month in San Francisco History?

According to NOAA records, the most precipitation that San Francisco, California has ever received in a single month is 14.9 inches which occurred in February 1998.

Month to date though April 15, 2024: 1.1 inches

San Francisco Most Rain in One Month

Rank	Precipitation	Month
1	14.9 inches	February 1998
2	12.1 inches	January 1998
3	12.0 inches	December 2002
4	11.7 inches	December 2014
5	11.6 inches	December 2022
6	11.5 inches	December 1955
7	11.2 inches	December 2005
8	10.8 inches	December 2001
9	10.7 inches	January 1952
10	10.5 inches	November 1994
11	10.1 inches	February 1936
12	10.0 inches	January 1940
13	9.8 inches	December 1945
14	9.8 inches	January 1993
15	9.8 inches	January 1982
16	9.5 inches	January 1967
17	9.4 inches	January 2017
18	9.4 inches	January 1973
19	9.2 inches	December 1931
20	9.1 inches	December 1952