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Half Moon Bay August Monthly Average Temperatures

A time series of monthly average August temperatures in Half Moon Bay, California from 1939–2021.

Hottest August in Half Moon Bay History

The hottest August in Half Moon Bay, California history occurred in 2015, when the average temperature of 65.0 °F was 5.1 °F higher than normal.

Coldest August in Half Moon Bay History

The coldest August in Half Moon Bay, California history occurred in 1969, when the average temperature of 54.7 °F was 5.1 °F below normal.

Half Moon Bay Average August Temperature by Year

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Year	Temperature (°F)	to Normal (°F)
2021	60.4	0.6
2020	60.9	1.0
2019	61.6	1.8
2018	59.4	-0.4
2017	60.7	0.9
2016	59.7	-0.1
2015	65.0	5.1
2014	63.4	3.5
2013	61.9	2.1
2012	58.1	-1.8
2011	58.5	-1.4
2010	58.8	-1.0
2009	60.6	0.8
2008	59.5	-0.3
2007	60.2	0.3
2006	59.9	0.0
2005	58.4	-1.4
2004	62.1	2.2
2001	58.8	-1.0
2000	58.9	-0.9
1999	59.4	-0.4
1998	58.5	-1.3
1997	62.8	2.9
1996	58.0	-1.9
1995	59.2	-0.7
1994	58.5	-1.4
1992	57.7	-2.2
1991	59.1	-0.8
1990	61.0	1.1
1989	59.1	-0.8
1986	59.9	0.0
1985	59.9	0.0
1984	60.1	0.2
1983	63.1	3.2
1982	59.1	-0.8
1981	58.9	-1.0
1980	58.6	-1.3
1979	59.4	-0.4
1978	59.1	-0.7
1977	61.1	1.2
1976	61.8	2.0
1975	57.1	-2.8
1974	59.8	0.0
1973	57.4	-2.4
1972	60.3	0.4
1971	58.4	-1.4
1970	55.3	-4.6
1969	54.7	-5.1
1967	58.7	-1.2
1966	57.9	-1.9
1965	60.5	0.6
1963	57.7	-2.1
1962	58.5	-1.4
1961	62.0	2.2
1960	57.5	-2.4
1959	61.0	1.1
1958	60.3	0.4
1957	58.8	-1.1
1956	56.4	-3.4
1955	55.1	-4.7
1954	57.1	-2.8
1953	59.0	-0.9
1952	59.0	-0.8
1951	56.4	-3.4
1949	58.8	-1.0
1948	58.7	-1.1
1947	61.2	1.3
1946	57.2	-2.7
1945	56.0	-3.8
1944	57.4	-2.5
1943	57.9	-2.0
1942	58.8	-1.1
1940	59.7	-0.1
1939	58.9	-0.9

Monthly average temperature is the mean of the daily high and low temperatures for the month
"Normal" is based on the average for the years 1991–2020