San Francisco September 18 Weather Records

Year	High (°F)	Low (°F)	Precip. (inches)	Snow (inches)
2023	68	59	0.00	n/a
2022	66	59	0.33	n/a
2021	67	56	0.02	n/a
2020	68	60	0.00	n/a
2019	70	60	0.02	n/a
2018	64	54	0.00	n/a
2017	67	59	0.00	0.0
2016	86	56	0.00	n/a
2015	74	58	0.00	n/a
2014	74	62	0.04	n/a
2013	75	56	0.00	n/a
2012	62	52	0.00	0.0
2011	79	55	0.00	0.0
2010	70	60	0.00	0.0
2009	87	61	0.00	n/a
2008	65	53	0.00	n/a
2007	65	56	0.00	0.0
2006	73	55	0.00	n/a
2005	62	53	0.00	n/a
2004	63	55	0.00	n/a
2003	88	59	0.00	n/a
2002	78	57	0.00	n/a
2001	62	52	0.00	0.0
2000	91	65	0.00	n/a
1999	61	51	0.00	0.0
1998	67	55	0.00	n/a
1997	78	56	0.00	n/a
1996	83	58	0.00	n/a
1995	85	58	0.00	n/a
1994	71	56	0.00	n/a
1993	67	55	0.00	n/a
1992	70	56	0.00	n/a
1991	67	55	0.00	n/a
1990	66	57	0.00	n/a
1989	65	56	0.06	n/a
1988	81	57	0.00	n/a
1987	70	54	0.00	n/a
1986	68	57	0.00	n/a
1985	71	57	0.00	n/a
1984	90	65	0.00	n/a
1983	68	54	0.00	n/a
1982	69	59	0.07	n/a
1981	65	55	0.00	n/a
1980	68	55	0.00	n/a
1979	69	59	0.00	n/a
1978	65	54	0.00	n/a
1977	72	61	0.00	n/a
1976	67	54	0.00	n/a
1975	62	55	0.00	n/a
1974	62	53	0.00	n/a
1973	65	55	0.00	n/a
1972	67	56	0.00	0.0
1971	65	54	0.00	0.0
1970	65	55	0.00	0.0
1969	70	56	0.00	0.0
1968	66	56	0.00	0.0
1967	73	60	0.04	0.0
1966	64	59	0.10	0.0
1965	74	56	0.00	0.0
1964	74	55	0.00	0.0
1963	74	59	0.00	0.0
1962	67	56	0.00	0.0
1961	69	55	0.00	0.0
1960	62	49	0.00	0.0
1959	67	61	2.01	0.0
1958	81	58	0.00	0.0
1957	67	59	0.00	0.0
1956	69	57	0.15	0.0
1955	69	54	0.00	0.0
1954	74	55	0.00	0.0
1953	68	59	0.00	0.0
1952	63	53	0.00	0.0
1951	63	53	0.00	0.0
1950	65	57	0.00	0.0
1949	84	55	0.00	0.0
1948	66	55	0.09	0.0
1947	64	53	0.00	0.0
1946	87	59	0.00	0.0
1945	63	58	0.00	0.0
1944	66	52	0.00	0.0
1943	75	57	0.00	0.0
1942	66	56	0.00	0.0
1941	65	58	0.00	0.0
1940	68	61	0.00	0.0
1939	88	58	0.00	0.0
1938	63	55	0.00	0.0
1937	65	54	0.00	0.0
1936	78	57	0.00	0.0
1935	76	57	0.00	0.0
1934	73	52	0.00	0.0
1933	69	55	0.00	0.0
1932	63	55	0.00	0.0
1931	68	58	0.00	0.0
1930	71	61	0.00	0.0
1929	68	55	0.00	0.0
1928	70	52	0.00	0.0
1927	68	56	0.00	0.0
1926	60	52	0.00	0.0
1925	70	57	0.13	0.0
1924	69	54	0.00	0.0
1923	75	60	0.00	0.0
1922	68	52	0.00	0.0
1921	66	56	0.03	0.0

What's the all-time high for San Francisco on 9/18?

For the date of Sep 18, the highest temperature ever reached in San Francisco history is 91 °F which happened in 2000.

Highest Temperatures in San Francisco on September 18

Rank	Temperature	Year
1	91 °F	2000
2	90 °F	1984
3	88 °F	1939
3	88 °F	2003
5	87 °F	2009
5	87 °F	1946
7	86 °F	2016
8	85 °F	1995
9	84 °F	1949
10	83 °F	1996

What's the all-time low for San Francisco on 9/18?

For the date of Sep 18, the lowest temperature ever reached in San Francisco history is 49 °F which happened in 1960.

Lowest Temperatures in San Francisco on September 18

Rank	Temperature	Year
1	49 °F	1960
2	51 °F	1999
3	52 °F	2001
3	52 °F	1928
3	52 °F	2012
3	52 °F	1934
3	52 °F	1944
3	52 °F	1922
3	52 °F	1926
10	53 °F	2008
10	53 °F	1974
10	53 °F	1952
10	53 °F	1951
10	53 °F	2005
10	53 °F	1947

Lowest High Temperatures in San Francisco on September 18

Rank	Temperature	Year
1	60 °F	1926
2	61 °F	1999
3	62 °F	1960
3	62 °F	1975
3	62 °F	2005
3	62 °F	1974
3	62 °F	2001
3	62 °F	2012
9	63 °F	1945
9	63 °F	1938
9	63 °F	1952
9	63 °F	1951
9	63 °F	2004
9	63 °F	1932

What's the most it has ever rained in San Francisco on 9/18?

For the date of Sep 18, the most precipitation ever recorded in San Francisco history is 2.01 inches which happened in 1959.

All-Time Most Precipitation in San Francisco on September 18

Rank	Precipitation	Year
1	2.01 inches	1959
2	0.33 inches	2022
3	0.15 inches	1956
4	0.13 inches	1925
5	0.10 inches	1966
6	0.09 inches	1948
7	0.07 inches	1982
8	0.06 inches	1989
9	0.04 inches	2014
9	0.04 inches	1967

Weather Station Details

Years	Station	Coordinates
1921–2024	Downtown San Francisco	location