San Francisco Weather Records

San Francisco, California weather averages and records from 1921–2024 based on data made available by the NOAA.
All-Time Recorded High
The highest temperature ever recorded in San Francisco, California was 106 °F which occurred on September 1, 2017.
Highest Temperatures: All-Time By Year
All-Time Recorded Low
The lowest temperature ever recorded in San Francisco, California was 27 °F which occurred on December 11, 1932.
Lowest Temperatures: All-Time By Year
San Francisco Weather by Month
Averages based on the years 1991–2020
Month Average (°F) Record (°F) Average (inches)
High ☀️ Low 🌙 High ☀️ Low 🌙 Precipitation 💧
January 58.4 46.9 79 30 4.4
February 61.0 48.2 81 31 4.4
March 62.8 49.2 87 35 3.2
April 63.7 49.9 94 40 1.6
May 64.7 51.7 97 43 0.7
June 67.1 53.3 103 47 0.2
July 67.1 54.7 99 47 0.0
August 68.6 55.8 98 48 0.1
September 70.8 55.9 106 48 0.1
October 70.4 54.7 102 43 0.9
November 64.2 50.9 86 39 2.6
December 58.5 47.2 76 27 4.8
Entire year 64.8 51.5 106 27 22.9
More San Francisco Weather Records
1921–2024
Highest daily low 75 °F September 2, 2017
Lowest daily high 35 °F December 11, 1932
Greatest daily range
(Difference of high and low)		 40 °F May 29, 1975
Greatest difference in daily high
over two conscutive days		 33 °F Sep 9–10, 1944
Most daily precipitation 5.5 inches November 5, 1994
Most monthly precipitation 14.9 inches February 1998
Most yearly precipitation 43.8 inches 1983
Most yearly days with precipitation 114 1998
Earliest freeze December 9 1972
Earliest day ≥ 70 °F January 1 1996
Earliest day ≥ 80 °F February 12 1996
Earliest day ≥ 90 °F April 6 1989
Latest freeze February 6 1989
Latest day ≥ 70 °F December 28 1975
Latest day ≥ 80 °F November 18 1932
Latest day ≥ 90 °F October 28 2003
Most days in a year < 32 °F 3 1990
Most days in a year ≥ 80 °F 37 1996
Most days in a year ≥ 90 °F 10 1984
Most days in a year ≥ 100 °F 2 2017
San Francisco Weather Streaks
Most consecutive days...
With precipitation 19 days Jan 27 – Feb 14, 1938
Without precipitation 142 days May 4 – Sep 22, 1930
High temperature ≥ 80 °F 8 days Oct 4–11, 1992
High temperature ≥ 90 °F 4 days Oct 25–28, 2003
Plant Hardiness Zone
10B
San Francisco is in plant hardiness zone 10B
based on average yearly minimum temperature from 1991–2020
Facts About San Francisco Weather
  • It almost never rains in San Francisco in July. During the entire thirty year period from 1991–2020, San Francisco received a total of less of 1" of rain during the month of July. Even Death Valley gets more rain than San Francisco in July.
  • San Francisco appears in our blog article 10 Interesting Facts About U.S. Weather
San Francisco Weather by Year
2024 2023 2022 2021 2020 2019 2018 2017 2016 2015
2014 2013 2012 2011 2010 2009 2008 2007 2006 2005
2004 2003 2002 2001 2000 1999 1998 1997 1996 1995
1994 1993 1992 1991 1990 1989 1988 1987 1986 1985
1984 1983 1982 1981 1980 1979 1978 1977 1976 1975
1974 1973 1972 1971 1970 1969 1968 1967 1966 1965
1964 1963 1962 1961 1960 1959 1958 1957 1956 1955
1954 1953 1952 1951 1950 1949 1948 1947 1946 1945
1944 1943 1942 1941 1940 1939 1938 1937 1936 1935
1934 1933 1932 1931 1930 1929 1928 1927 1926 1925
1924 1923 1922 1921
More San Francisco Weather
Average Weather by Day
Record High by Day
Record Low by Day
Average Temperature by Year
Average Temperature by Month
Average Rainfall By Month
Recent Weather Records
Records for Today
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Weather Station Details
Years Station Coordinates
1921–2024 Downtown San Francisco location
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