San Francisco August 21 Weather Records

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	73	61	0.00	n/a
2022	70	55	0.00	n/a
2021	63	57	0.00	n/a
2020	75	58	0.00	n/a
2019	74	58	0.00	n/a
2018	64	55	0.00	n/a
2017	70	61	0.00	n/a
2016	64	57	0.00	n/a
2015	64	59	0.00	n/a
2014	69	59	0.00	n/a
2013	66	57	0.00	0.0
2012	61	52	0.00	0.0
2011	63	55	0.00	0.0
2010	61	53	0.00	n/a
2009	75	55	0.00	n/a
2008	68	59	0.00	n/a
2007	74	58	0.00	n/a
2006	62	53	0.00	0.0
2005	61	54	0.00	n/a
2004	68	58	0.00	n/a
2003	71	60	0.00	n/a
2002	61	52	0.00	n/a
2001	67	52	0.00	n/a
2000	68	53	0.00	0.0
1999	71	55	0.00	0.0
1998	63	54	0.00	0.0
1997	80	57	0.00	n/a
1996	70	57	0.00	n/a
1995	67	56	0.00	n/a
1994	67	55	0.00	n/a
1993	82	56	0.00	n/a
1992	69	54	0.00	n/a
1991	69	57	0.00	n/a
1990	71	59	0.00	n/a
1989	69	59	0.00	n/a
1988	68	58	0.00	n/a
1987	70	57	0.00	n/a
1986	62	55	0.00	n/a
1985	69	57	0.00	n/a
1984	66	54	0.00	n/a
1983	74	60	0.00	n/a
1982	68	52	0.00	n/a
1981	68	53	0.00	n/a
1980	59	52	0.00	n/a
1979	68	60	0.00	n/a
1978	61	55	0.00	n/a
1977	67	54	0.00	n/a
1976	71	60	0.00	n/a
1975	65	53	0.00	n/a
1974	77	54	0.00	n/a
1973	60	51	0.00	0.0
1972	71	59	0.00	0.0
1971	67	58	0.00	0.0
1970	59	50	0.00	0.0
1969	71	53	0.00	0.0
1968	67	58	0.00	0.0
1967	67	56	0.00	0.0
1966	62	53	0.00	0.0
1965	66	56	0.00	0.0
1964	63	54	0.00	0.0
1963	69	54	0.00	0.0
1962	63	53	0.00	0.0
1961	66	58	0.00	0.0
1960	64	53	0.00	0.0
1959	71	56	0.00	0.0
1958	64	54	0.00	0.0
1957	66	52	0.00	0.0
1956	65	55	0.01	0.0
1955	59	50	0.00	0.0
1954	68	52	0.00	0.0
1953	69	54	0.00	0.0
1952	69	54	0.00	0.0
1951	65	57	0.22	0.0
1950	59	53	0.00	0.0
1949	71	54	0.00	0.0
1948	61	55	0.01	0.0
1947	64	54	0.00	0.0
1946	64	53	0.00	0.0
1945	73	53	0.00	0.0
1944	59	51	0.00	0.0
1943	67	56	0.00	0.0
1942	64	55	0.00	0.0
1941	62	55	0.00	0.0
1940	59	54	0.00	0.0
1939	65	55	0.00	0.0
1938	60	55	0.00	0.0
1937	64	55	0.00	0.0
1936	60	58	0.00	0.0
1935	63	50	0.00	0.0
1934	66	56	0.00	0.0
1933	63	54	0.00	0.0
1932	69	54	0.00	0.0
1931	72	53	0.00	0.0
1930	75	55	0.00	0.0
1929	71	53	0.00	0.0
1928	68	52	0.00	0.0
1927	65	55	0.00	0.0
1926	64	53	0.00	0.0
1925	69	54	0.00	0.0
1924	64	54	0.00	0.0
1923	74	61	0.00	0.0
1922	64	54	0.00	0.0
1921	66	55	0.00	0.0

What's the all-time high for San Francisco on 8/21?

For the date of Aug 21, the highest temperature ever reached in San Francisco history is 82 °F which happened in 1993.

Highest Temperatures in San Francisco on August 21

Rank	Temperature	Year
1	82 °F	1993
2	80 °F	1997
3	77 °F	1974
4	75 °F	1930
4	75 °F	2009
4	75 °F	2020
7	74 °F	1983
7	74 °F	2007
7	74 °F	2019
7	74 °F	1923

What's the all-time low for San Francisco on 8/21?

For the date of Aug 21, the lowest temperature ever reached in San Francisco history is 50 °F which has happened 3 times, most recently in 1970.

Lowest Temperatures in San Francisco on August 21

Rank	Temperature	Year
1	50 °F	1955
1	50 °F	1935
1	50 °F	1970
4	51 °F	1944
4	51 °F	1973
6	52 °F	2002
6	52 °F	2001
6	52 °F	1957
6	52 °F	1980
6	52 °F	2012
6	52 °F	1982
6	52 °F	1928
6	52 °F	1954

Lowest High Temperatures in San Francisco on August 21

Rank	Temperature	Year
1	59 °F	1955
1	59 °F	1950
1	59 °F	1970
1	59 °F	1944
1	59 °F	1980
1	59 °F	1940
7	60 °F	1973
7	60 °F	1936
7	60 °F	1938
10	61 °F	1948
10	61 °F	2005
10	61 °F	2010
10	61 °F	1978
10	61 °F	2012
10	61 °F	2002

What's the most it has ever rained in San Francisco on 8/21?

For the date of Aug 21, the most precipitation ever recorded in San Francisco history is 0.22 inches which happened in 1951.

All-Time Most Precipitation in San Francisco on August 21

Rank	Precipitation	Year
1	0.22 inches	1951
2	0.01 inches	1956
2	0.01 inches	1948

Weather Station Details

Years	Station	Coordinates
1921–2024	Downtown San Francisco	location