San Jose September 21 Weather Records

Daily averages and all-time records for weather in San Jose, California for the date of September 21.
September 21 All-Time Records
1893–2024
Highest temperature 101 °F 1939
Lowest temperature 39 °F 1893
Lowest daily high 67 °F 1916
Highest daily low 70 °F 1900
Most precipitation 0.66 inches 2013
September 21 Average Weather
1991–2020 1
Average high 80.0 °F
Average low 56.8 °F
Chance precipitation 3.4%
San Jose September 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 81 56 0.00 n/a
2022 75 62 0.00 n/a
2021 92 61 0.00 n/a
2020 83 60 0.00 n/a
2019 87 58 0.00 n/a
2018 85 57 0.00 n/a
2017 72 54 0.00 n/a
2016 76 58 0.00 n/a
2015 97 64 0.00 n/a
2014 74 62 0.00 n/a
2013 70 57 0.66 n/a
2012 79 51 0.00 n/a
2011 93 60 0.00 n/a
2010 73 54 0.00 n/a
2009 89 59 0.00 n/a
2008 74 56 0.00 n/a
2007 78 58 0.00 n/a
2006 80 56 0.00 n/a
2005 78 57 0.00 n/a
2004 81 50 0.00 n/a
2003 97 62 0.00 n/a
2002 85 60 0.00 n/a
2001 77 57 0.00 n/a
2000 75 61 0.00 n/a
1999 78 55 0.00 n/a
1998 76 55 0.00 0.0
1997 88 57 0.00 0.0
1996 87 57 0.00 0.0
1995 79 61 0.00 0.0
1994 81 61 0.00 0.0
1993 77 53 0.00 0.0
1992 81 55 0.00 0.0
1991 88 55 0.00 0.0
1990 86 58 0.00 0.0
1989 83 54 0.00 0.0
1988 76 53 0.00 0.0
1987 88 56 0.00 0.0
1986 73 48 0.00 0.0
1985 86 53 0.00 0.0
1984 82 56 0.00 0.0
1983 91 67 0.00 0.0
1982 84 51 0.00 0.0
1981 81 52 0.00 0.0
1980 78 50 0.00 0.0
1979 82 55 0.00 0.0
1978 80 51 0.00 0.0
1977 79 52 0.00 0.0
1976 74 55 0.00 0.0
1975 75 54 0.00 0.0
1974 77 53 0.00 0.0
1973 77 51 0.00 0.0
1972 83 51 0.00 0.0
1971 77 58 0.00 0.0
1970 79 50 0.00 0.0
1969 79 58 0.00 0.0
1968 77 45 0.00 0.0
1967 94 60 0.00 0.0
1966 80 53 0.00 0.0
1965 80 46 0.00 0.0
1964 86 69 0.00 0.0
1963 76 53 0.00 0.0
1962 82 54 0.00 0.0
1961 71 56 0.00 0.0
1960 79 50 0.00 0.0
1959 79 52 0.00 0.0
1958 93 57 0.00 0.0
1957 88 54 0.00 0.0
1956 83 54 0.00 0.0
1955 80 51 0.00 0.0
1954 70 55 0.00 0.0
1953 73 61 0.00 0.0
1952 85 55 0.00 0.0
1951 74 56 0.00 0.0
1950 93 58 0.00 0.0
1949 96 61 0.00 0.0
1948 70 48 0.00 0.0
1947 98 58 0.00 0.0
1946 88 52 0.00 0.0
1945 70 57 0.00 0.0
1944 75 55 0.00 0.0
1943 100 64 0.00 n/a
1942 78 54 0.00 0.0
1941 80 46 0.00 n/a
1940 82 51 0.00 n/a
1939 101 69 0.00 n/a
1938 80 54 0.00 n/a
1937 82 54 0.00 n/a
1936 79 53 0.00 0.0
1935 77 54 0.00 n/a
1934 79 54 0.00 n/a
1933 72 50 0.00 0.0
1932 78 53 0.00 0.0
1931 91 54 0.00 0.0
1930 72 57 0.00 n/a
1929 77 50 0.00 n/a
1928 101 56 0.00 n/a
1927 76 46 0.00 n/a
1926 77 43 0.00 n/a
1925 83 46 0.00 n/a
1924 86 43 0.00 n/a
1923 73 58 0.35 n/a
1922 76 47 0.00 n/a
1921 86 46 0.00 n/a
1920 76 47 0.00 n/a
1919 87 51 0.00 n/a
1918 73 54 0.08 n/a
1917 73 44 0.01 n/a
1916 67 54 0.60 n/a
1915 73 50 0.00 n/a
1914 87 49 0.00 n/a
1913 75 59 0.00 n/a
1912 77 49 0.00 n/a
1911 67 48 0.00 n/a
1910 80 49 0.00 n/a
1909 86 45 0.00 n/a
1908 78 54 0.00 n/a
1907 72 44 0.00 n/a
1906 70 48 0.00 n/a
1905 95 50 0.00 n/a
1904 71 56 0.00 n/a
1903 75 44 0.00 n/a
1902 n/a n/a 0.00 n/a
1901 70 52 0.00 n/a
1900 93 70 0.00 n/a
1899 n/a n/a 0.00 n/a
1898 n/a n/a n/a n/a
1897 n/a n/a n/a n/a
1896 72 48 0.00 n/a
1895 70 40 0.00 n/a
1894 93 47 0.00 n/a
1893 74 39 0.00 n/a
What's the all-time high for San Jose on 9/21?
For the date of Sep 21, the highest temperature ever reached in San Jose history is 101 °F which has happened 2 times, most recently in 1939.
Highest Temperatures in San Jose on September 21
Rank Temperature Year
1 101 °F 1928
1 101 °F 1939
3 100 °F 1943
4 98 °F 1947
5 97 °F 2003
5 97 °F 2015
7 96 °F 1949
8 95 °F 1905
9 94 °F 1967
10 93 °F 2011
10 93 °F 1900
10 93 °F 1958
10 93 °F 1950
10 93 °F 1894
What's the all-time low for San Jose on 9/21?
For the date of Sep 21, the lowest temperature ever reached in San Jose history is 39 °F which happened in 1893.
Lowest Temperatures in San Jose on September 21
Rank Temperature Year
1 39 °F 1893
2 40 °F 1895
3 43 °F 1924
3 43 °F 1926
5 44 °F 1907
5 44 °F 1903
5 44 °F 1917
8 45 °F 1909
8 45 °F 1968
10 46 °F 1941
10 46 °F 1965
10 46 °F 1925
10 46 °F 1921
10 46 °F 1927
Lowest High Temperatures in San Jose on September 21
Rank Temperature Year
1 67 °F 1911
1 67 °F 1916
3 70 °F 1901
3 70 °F 1906
3 70 °F 1895
3 70 °F 1954
3 70 °F 2013
3 70 °F 1948
3 70 °F 1945
10 71 °F 1961
10 71 °F 1904
What's the most it has ever rained in San Jose on 9/21?
For the date of Sep 21, the most precipitation ever recorded in San Jose history is 0.66 inches which happened in 2013.
All-Time Most Precipitation in San Jose on September 21
Rank Precipitation Year
1 0.66 inches 2013
2 0.60 inches 1916
3 0.35 inches 1923
4 0.08 inches 1918
5 0.01 inches 1917
Weather Station Details
Years Station Coordinates
1999–2024 San Jose 2 location
1893–1998 San Jose location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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