San Jose September 18 Weather Records

Daily averages and all-time records for weather in San Jose, California for the date of September 18.
September 18 All-Time Records
1893–2024
Highest temperature 100 °F 1913
Lowest temperature 42 °F 1911
Lowest daily high 66 °F 1959
Highest daily low 68 °F 1984
Most precipitation 2.00 inches 1959
September 18 Average Weather
1991–2020 1
Average high 80.7 °F
Average low 57.3 °F
Chance precipitation 2.9%
San Jose September 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 79 58 0.00 n/a
2022 73 61 0.51 n/a
2021 77 55 0.00 n/a
2020 79 64 0.00 n/a
2019 76 58 0.00 n/a
2018 75 49 0.00 n/a
2017 80 60 0.00 n/a
2016 93 58 0.00 n/a
2015 81 54 0.00 n/a
2014 80 64 0.00 n/a
2013 83 55 0.00 n/a
2012 69 54 0.00 n/a
2011 88 55 0.00 n/a
2010 77 63 0.00 n/a
2009 95 61 0.00 n/a
2008 72 50 0.00 n/a
2007 77 55 0.00 n/a
2006 86 57 0.00 n/a
2005 78 52 0.00 n/a
2004 67 55 0.00 n/a
2003 89 54 0.00 n/a
2002 88 58 0.00 n/a
2001 75 55 0.00 n/a
2000 98 62 0.00 n/a
1999 72 57 0.00 n/a
1998 77 59 0.00 0.0
1997 79 62 0.00 0.0
1996 84 55 0.00 0.0
1995 92 57 0.00 0.0
1994 79 60 0.00 0.0
1993 73 53 0.00 0.0
1992 79 58 0.00 0.0
1991 81 59 0.00 0.0
1990 80 59 0.00 0.0
1989 68 56 0.12 0.0
1988 85 59 0.00 0.0
1987 81 56 0.00 0.0
1986 73 51 0.00 0.0
1985 76 55 0.00 0.0
1984 92 68 0.00 0.0
1983 78 56 0.00 0.0
1982 74 58 0.00 0.0
1981 75 58 0.00 0.0
1980 79 58 0.00 0.0
1979 80 58 0.00 0.0
1978 72 51 0.00 0.0
1977 76 55 0.00 0.0
1976 77 53 0.00 0.0
1975 74 56 0.00 0.0
1974 80 56 0.00 0.0
1973 73 52 0.00 0.0
1972 74 50 0.00 0.0
1971 82 60 0.00 0.0
1970 87 55 0.00 0.0
1969 79 63 0.00 0.0
1968 88 56 0.00 0.0
1967 78 60 0.02 0.0
1966 78 61 0.18 0.0
1965 77 47 0.00 0.0
1964 82 50 0.00 0.0
1963 75 58 0.00 0.0
1962 75 59 0.00 0.0
1961 n/a n/a n/a n/a
1960 80 54 0.00 0.0
1959 66 61 2.00 0.0
1958 89 53 0.00 0.0
1957 75 56 0.00 0.0
1956 83 65 0.00 0.0
1955 79 48 0.00 0.0
1954 80 48 0.00 0.0
1953 79 58 0.00 0.0
1952 75 55 0.00 0.0
1951 75 58 0.00 0.0
1950 73 56 0.00 0.0
1949 92 57 0.00 0.0
1948 74 54 0.00 0.0
1947 69 50 0.00 0.0
1946 90 49 0.00 0.0
1945 79 58 0.00 0.0
1944 78 48 0.00 0.0
1943 82 49 0.00 n/a
1942 78 55 0.00 0.0
1941 72 54 0.00 n/a
1940 76 55 0.00 n/a
1939 94 58 0.00 n/a
1938 74 57 0.00 n/a
1937 74 50 0.00 n/a
1936 93 55 0.00 0.0
1935 91 58 0.00 n/a
1934 83 54 0.00 n/a
1933 74 54 0.00 0.0
1932 76 55 0.00 0.0
1931 72 54 0.00 0.0
1930 79 57 0.00 n/a
1929 84 53 0.00 n/a
1928 85 54 0.00 n/a
1927 75 47 0.00 n/a
1926 71 44 0.00 n/a
1925 75 52 0.01 n/a
1924 80 52 0.00 n/a
1923 82 54 0.00 n/a
1922 86 48 0.00 n/a
1921 73 53 0.00 n/a
1920 75 49 0.00 n/a
1919 95 49 0.00 n/a
1918 77 58 0.00 n/a
1917 91 51 0.00 n/a
1916 79 44 0.00 n/a
1915 89 48 0.00 n/a
1914 78 54 0.00 n/a
1913 100 59 0.00 n/a
1912 99 58 0.00 n/a
1911 86 42 0.00 n/a
1910 72 43 0.00 n/a
1909 81 46 0.00 n/a
1908 70 42 0.00 n/a
1907 79 42 0.00 n/a
1906 93 51 0.00 n/a
1905 91 59 0.00 n/a
1904 76 60 0.00 n/a
1903 87 46 0.00 n/a
1902 n/a n/a 0.00 n/a
1901 75 54 0.00 n/a
1900 83 55 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 68 44 0.01 n/a
1895 73 46 0.00 n/a
1894 85 44 0.00 n/a
1893 70 44 0.00 n/a
What's the all-time high for San Jose on 9/18?
For the date of Sep 18, the highest temperature ever reached in San Jose history is 100 °F which happened in 1913.
Highest Temperatures in San Jose on September 18
Rank Temperature Year
1 100 °F 1913
2 99 °F 1912
3 98 °F 2000
4 95 °F 2009
4 95 °F 1919
6 94 °F 1939
7 93 °F 1936
7 93 °F 2016
7 93 °F 1906
10 92 °F 1995
10 92 °F 1949
10 92 °F 1984
What's the all-time low for San Jose on 9/18?
For the date of Sep 18, the lowest temperature ever reached in San Jose history is 42 °F which has happened 3 times, most recently in 1911.
Lowest Temperatures in San Jose on September 18
Rank Temperature Year
1 42 °F 1907
1 42 °F 1911
1 42 °F 1908
4 43 °F 1910
5 44 °F 1894
5 44 °F 1896
5 44 °F 1893
5 44 °F 1916
5 44 °F 1926
10 46 °F 1909
10 46 °F 1903
10 46 °F 1895
Lowest High Temperatures in San Jose on September 18
Rank Temperature Year
1 66 °F 1959
2 67 °F 2004
3 68 °F 1896
3 68 °F 1989
5 69 °F 2012
5 69 °F 1947
7 70 °F 1908
7 70 °F 1893
9 71 °F 1926
10 72 °F 1910
10 72 °F 1941
10 72 °F 1931
10 72 °F 1999
10 72 °F 2008
10 72 °F 1978
What's the most it has ever rained in San Jose on 9/18?
For the date of Sep 18, the most precipitation ever recorded in San Jose history is 2.00 inches which happened in 1959.
All-Time Most Precipitation in San Jose on September 18
Rank Precipitation Year
1 2.00 inches 1959
2 0.51 inches 2022
3 0.18 inches 1966
4 0.12 inches 1989
5 0.02 inches 1967
6 0.01 inches 1925
6 0.01 inches 1896
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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