San Francisco September 20 Weather Records

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	68	58	0.00	n/a
2022	73	58	0.00	n/a
2021	83	58	0.00	n/a
2020	78	59	0.00	n/a
2019	79	59	0.00	n/a
2018	83	57	0.00	n/a
2017	68	58	0.00	0.0
2016	65	56	0.00	n/a
2015	93	63	0.00	n/a
2014	66	61	0.00	n/a
2013	70	55	0.00	0.0
2012	63	52	0.00	0.0
2011	86	56	0.00	n/a
2010	68	56	0.00	0.0
2009	77	56	0.00	n/a
2008	67	58	0.00	n/a
2007	68	52	0.00	0.0
2006	76	53	0.00	n/a
2005	82	50	0.00	n/a
2004	69	52	0.00	n/a
2003	83	55	0.00	n/a
2002	82	58	0.00	n/a
2001	64	53	0.00	0.0
2000	75	64	0.00	n/a
1999	66	57	0.00	0.0
1998	65	55	0.00	n/a
1997	90	57	0.00	n/a
1996	82	56	0.00	n/a
1995	71	55	0.00	n/a
1994	69	56	0.00	n/a
1993	73	54	0.00	n/a
1992	72	56	0.00	n/a
1991	63	56	0.00	n/a
1990	91	57	0.00	n/a
1989	72	56	0.00	n/a
1988	73	52	0.00	n/a
1987	80	52	0.00	n/a
1986	72	55	0.00	n/a
1985	72	56	0.00	n/a
1984	66	58	0.00	n/a
1983	94	63	0.00	n/a
1982	76	56	0.00	n/a
1981	72	54	0.00	n/a
1980	63	55	0.00	n/a
1979	68	57	0.00	n/a
1978	80	57	0.00	n/a
1977	68	59	0.00	n/a
1976	64	56	0.00	n/a
1975	62	53	0.00	n/a
1974	59	54	0.00	n/a
1973	68	57	0.17	n/a
1972	78	58	0.00	0.0
1971	61	54	0.00	0.0
1970	65	52	0.00	0.0
1969	66	56	0.00	0.0
1968	64	54	0.00	0.0
1967	87	61	0.00	0.0
1966	69	58	0.00	0.0
1965	69	52	0.00	0.0
1964	74	62	0.00	0.0
1963	66	57	0.00	0.0
1962	68	54	0.00	0.0
1961	63	56	0.00	0.0
1960	61	53	0.00	0.0
1959	67	57	0.00	0.0
1958	82	57	0.00	0.0
1957	72	55	0.00	0.0
1956	70	55	0.00	0.0
1955	56	50	0.00	0.0
1954	72	52	0.00	0.0
1953	62	59	0.00	0.0
1952	68	55	0.00	0.0
1951	61	53	0.00	0.0
1950	81	56	0.00	0.0
1949	85	54	0.00	0.0
1948	61	53	0.00	0.0
1947	92	56	0.00	0.0
1946	77	58	0.00	0.0
1945	61	56	0.00	0.0
1944	65	52	0.00	0.0
1943	96	64	0.00	0.0
1942	59	53	0.00	0.0
1941	66	55	0.00	0.0
1940	76	58	0.00	0.0
1939	97	69	0.00	0.0
1938	63	51	0.00	0.0
1937	77	56	0.00	0.0
1936	74	51	0.00	0.0
1935	65	54	0.00	0.0
1934	64	54	0.00	0.0
1933	71	55	0.00	0.0
1932	69	56	0.00	0.0
1931	83	61	0.00	0.0
1930	67	58	0.00	0.0
1929	65	54	0.00	0.0
1928	95	59	0.00	0.0
1927	64	55	0.00	0.0
1926	66	56	0.00	0.0
1925	72	56	0.00	0.0
1924	76	55	0.00	0.0
1923	74	58	0.00	0.0
1922	64	53	0.00	0.0
1921	77	57	0.00	0.0

What's the all-time high for San Francisco on 9/20?

For the date of Sep 20, the highest temperature ever reached in San Francisco history is 97 °F which happened in 1939.

Highest Temperatures in San Francisco on September 20

Rank	Temperature	Year
1	97 °F	1939
2	96 °F	1943
3	95 °F	1928
4	94 °F	1983
5	93 °F	2015
6	92 °F	1947
7	91 °F	1990
8	90 °F	1997
9	87 °F	1967
10	86 °F	2011

What's the all-time low for San Francisco on 9/20?

For the date of Sep 20, the lowest temperature ever reached in San Francisco history is 50 °F which has happened 2 times, most recently in 2005.

Lowest Temperatures in San Francisco on September 20

Rank	Temperature	Year
1	50 °F	2005
1	50 °F	1955
3	51 °F	1936
3	51 °F	1938
5	52 °F	2004
5	52 °F	1970
5	52 °F	1954
5	52 °F	1988
5	52 °F	1944
5	52 °F	1987
5	52 °F	2007
5	52 °F	1965
5	52 °F	2012

Lowest High Temperatures in San Francisco on September 20

Rank	Temperature	Year
1	56 °F	1955
2	59 °F	1974
2	59 °F	1942
4	61 °F	1945
4	61 °F	1948
4	61 °F	1951
4	61 °F	1960
4	61 °F	1971
9	62 °F	1953
9	62 °F	1975

What's the most it has ever rained in San Francisco on 9/20?

For the date of Sep 20, the most precipitation ever recorded in San Francisco history is 0.17 inches which happened in 1973.

All-Time Most Precipitation in San Francisco on September 20

Rank	Precipitation	Year
1	0.17 inches	1973

Weather Station Details

Years	Station	Coordinates
1921–2024	Downtown San Francisco	location