Half Moon Bay August Precipitation Totals

A time series of total precipitation in the month of August in Half Moon Bay, California from 1939–2023.

Rainiest August in Half Moon Bay History

The rainiest August in Half Moon Bay, California history happened in 1976, with 1.56 inches of total precipitation.

Driest August in Half Moon Bay History

There have been 21 times where no rain was recorded in Half Moon Bay, California for the entire month of August. The most recent time this happened was 2006.

Half Moon Bay Average August Precipitation by Year

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Year	Precipitation (inches)
2023	0.26
2022	0.17
2021	0.07
2020	0.30
2019	0.25
2018	0.10
2017	0.17
2016	0.13
2015	0.08
2014	0.11
2013	0.26
2012	0.10
2011	0.37
2010	0.28
2009	0.17
2008	0.23
2007	0.06
2006	0.00
2005	0.04
2004	0.32
2002	0.21
2001	0.39
2000	0.19
1999	0.34
1998	0.06
1997	0.77
1996	0.07
1995	0.05
1994	0.17
1992	0.18
1991	0.92
1990	0.14
1989	0.26
1988	0.01
1987	0.10
1986	0.25
1985	0.05
1984	0.33
1983	0.14
1982	0.15
1981	0.42
1980	0.05
1979	0.13
1978	0.00
1977	0.27
1976	1.56
1975	0.59
1974	0.13
1973	0.09
1972	0.00
1971	0.36
1970	0.00
1969	0.00
1968	0.28
1967	0.00
1966	0.27
1965	0.23
1964	0.00
1963	0.03
1962	0.08
1961	0.10
1960	0.00
1959	0.21
1958	0.00
1957	0.08
1956	0.29
1954	0.55
1953	0.53
1952	0.00
1951	0.00
1950	0.00
1949	0.17
1948	0.00
1947	0.00
1946	0.00
1944	0.00
1943	0.00
1942	0.00
1941	0.00
1940	0.00
1939	0.00

Notes

Its possible for precipitation totals to include both rain and melted snowfall
Months with more than 10% missing data are excluded