Most Monthly Precipitation in Half Moon Bay History

This is a list of the largest monthly precipitation totals ever recorded in Half Moon Bay, California history from 1939–2024.
What Was the Wettest Month in Half Moon Bay History?
According to NOAA records, the most precipitation that Half Moon Bay, California has ever received in a single month is 15.7 inches which occurred in February 1998.
Month to date though March 26, 2024: 4.5 inches
Half Moon Bay Most Rain in One Month
Rank Precipitation Month
1 15.7 inches February 1998
2 13.1 inches March 1983
3 12.7 inches December 1955
4 12.1 inches January 1998
5 12.0 inches January 1982
6 11.5 inches February 1986
7 11.4 inches January 1995
8 11.3 inches December 2021
9 11.3 inches February 2000
10 11.0 inches October 1962
11 10.8 inches December 2014
12 10.5 inches December 2022
13 10.4 inches January 1967
14 10.3 inches January 2017
15 10.2 inches January 1940
16 10.2 inches December 1952
17 9.9 inches December 2005
18 9.9 inches November 1984
19 9.9 inches January 1997
20 9.5 inches March 2006