Most Daily Precipitation in Half Moon Bay History

This is a list of the largest daily precipitation totals ever recorded in Half Moon Bay, California history from 1939–2024.

What's the Most It Has Ever Rained in Half Moon Bay?

According to NOAA records, the most rain that Half Moon Bay, California has ever received in a single day is 5.5 inches which occurred on Monday December 16, 2002.

Also see most rain in: 2 days | 1 week | 1 month

Half Moon Bay Most Rain in One Day

Rank	Precipitation	Date
1	5.5 inches	December 16, 2002
2	5.4 inches	December 13, 2021
3	5.3 inches	January 4, 1982
4	4.9 inches	October 13, 1962
5	4.0 inches	January 21, 1967
6	3.9 inches	March 30, 1940
7	3.5 inches	January 21, 1943
8	3.1 inches	December 31, 2022
9	3.1 inches	January 15, 1978
10	3.0 inches	January 27, 1981
11	2.9 inches	February 3, 1998
12	2.9 inches	January 21, 1964
13	2.9 inches	December 27, 2004
14	2.9 inches	October 12, 1962
15	2.9 inches	October 13, 2009
16	2.8 inches	November 18, 1982
17	2.8 inches	March 31, 1982
17	2.8 inches	December 23, 1955
19	2.8 inches	February 16, 2009
20	2.8 inches	January 5, 1982