Gilroy September 18 Weather Records

Daily averages and all-time records for weather in Gilroy, California for the date of September 18.
September 18 All-Time Records
1906–2023
Highest temperature 98 °F 1984
Lowest temperature 38 °F 2009
Lowest daily high 69 °F 1993
Highest daily low 68 °F 1984
Most precipitation 0.28 inches 1959
Most snow none -
September 18 Average Weather
1991–2020 1
Average high 85.3 °F
Average low 53.6 °F
Chance precipitation 2.2%
Chance snow 0%
Gilroy September 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2022 73 58 0.10 n/a
2021 79 57 0.00 n/a
2020 83 65 0.00 n/a
2019 n/a n/a n/a n/a
2018 83 49 0.00 n/a
2017 82 53 0.00 n/a
2016 n/a n/a n/a n/a
2015 74 53 0.00 n/a
2014 80 56 0.00 n/a
2013 85 48 0.00 n/a
2012 77 51 0.00 n/a
2011 84 46 0.00 n/a
2010 77 62 0.00 0.0
2009 90 38 0.00 0.0
2008 76 49 0.00 0.0
2007 77 53 0.00 0.0
2006 88 53 0.00 0.0
2005 84 49 0.00 0.0
2004 84 55 0.00 0.0
2003 86 51 0.00 0.0
2002 83 57 0.00 0.0
2001 n/a n/a n/a n/a
2000 95 59 0.00 0.0
1999 75 54 0.00 0.0
1998 83 54 0.00 0.0
1997 83 57 0.00 0.0
1996 90 50 0.00 0.0
1995 89 55 0.00 0.0
1994 82 53 0.00 0.0
1993 69 49 0.00 0.0
1992 84 51 0.00 0.0
1991 96 51 0.00 0.0
1990 75 57 0.00 0.0
1989 72 57 0.10 0.0
1988 91 47 0.00 0.0
1987 84 53 0.00 0.0
1986 69 45 0.01 0.0
1985 75 53 0.00 0.0
1984 98 68 0.00 0.0
1983 88 54 0.00 0.0
1982 75 58 0.00 0.0
1981 91 55 0.00 0.0
1980 90 55 0.00 0.0
1979 90 54 0.00 0.0
1978 78 45 0.00 0.0
1977 82 50 0.00 0.0
1976 83 49 0.00 0.0
1975 90 54 0.00 0.0
1974 95 49 0.00 0.0
1973 81 49 0.00 0.0
1972 80 48 0.00 0.0
1971 80 55 0.00 0.0
1970 94 49 0.00 0.0
1969 81 46 0.00 0.0
1968 94 52 0.00 0.0
1967 85 55 0.00 0.0
1966 91 60 0.00 0.0
1965 78 44 0.00 0.0
1964 77 44 0.00 0.0
1963 79 57 0.00 0.0
1962 82 55 0.00 0.0
1961 77 45 0.00 0.0
1960 87 48 0.00 0.0
1959 77 56 0.28 0.0
1958 95 52 0.00 0.0
1957 79 52 0.00 0.0
1956 n/a n/a n/a n/a
1955 n/a n/a n/a n/a
1954 n/a n/a n/a n/a
1953 n/a n/a n/a n/a
1952 n/a n/a n/a n/a
1951 n/a n/a n/a n/a
1950 n/a n/a n/a n/a
1949 n/a n/a n/a n/a
1948 n/a n/a n/a n/a
1947 n/a n/a n/a n/a
1946 n/a n/a n/a n/a
1945 n/a n/a n/a n/a
1944 n/a n/a n/a n/a
1943 n/a n/a n/a n/a
1942 n/a n/a n/a n/a
1941 n/a n/a n/a n/a
1940 n/a n/a n/a n/a
1939 n/a n/a n/a n/a
1938 n/a n/a n/a n/a
1937 n/a n/a n/a n/a
1936 n/a n/a n/a n/a
1935 n/a n/a n/a n/a
1934 n/a n/a n/a n/a
1933 n/a n/a n/a n/a
1932 n/a n/a n/a n/a
1931 n/a n/a n/a n/a
1930 n/a n/a n/a n/a
1929 n/a n/a n/a n/a
1928 n/a n/a n/a n/a
1927 n/a n/a n/a n/a
1926 n/a n/a n/a n/a
1925 n/a n/a n/a n/a
1924 n/a n/a n/a n/a
1923 n/a n/a n/a n/a
1922 n/a n/a n/a n/a
1921 n/a n/a n/a n/a
1920 n/a n/a n/a n/a
1919 n/a n/a n/a n/a
1918 n/a n/a n/a n/a
1917 n/a n/a n/a n/a
1916 n/a n/a n/a n/a
1915 n/a n/a n/a n/a
1914 n/a n/a n/a n/a
1913 n/a n/a n/a n/a
1912 n/a n/a n/a n/a
1911 n/a n/a 0.00 n/a
1910 n/a n/a n/a n/a
1909 n/a n/a 0.00 n/a
1908 n/a n/a 0.00 n/a
1907 n/a n/a 0.00 n/a
1906 n/a n/a n/a n/a
What's the all-time high for Gilroy on 9/18?
For the date of Sep 18, the highest temperature ever reached in Gilroy history is 98 °F which happened in 1984.
Highest Temperatures in Gilroy on September 18
Rank Temperature Year
1 98 °F 1984
2 96 °F 1991
3 95 °F 1958
3 95 °F 1974
3 95 °F 2000
6 94 °F 1970
6 94 °F 1968
8 91 °F 1966
8 91 °F 1988
8 91 °F 1981
What's the all-time low for Gilroy on 9/18?
For the date of Sep 18, the lowest temperature ever reached in Gilroy history is 38 °F which happened in 2009.
Lowest Temperatures in Gilroy on September 18
Rank Temperature Year
1 38 °F 2009
2 44 °F 1964
2 44 °F 1965
4 45 °F 1986
4 45 °F 1961
4 45 °F 1978
7 46 °F 2011
7 46 °F 1969
9 47 °F 1988
10 48 °F 1960
10 48 °F 1972
10 48 °F 2013
Lowest High Temperatures in Gilroy on September 18
Rank Temperature Year
1 69 °F 1986
1 69 °F 1993
3 72 °F 1989
4 73 °F 2022
5 74 °F 2015
6 75 °F 1982
6 75 °F 1990
6 75 °F 1985
6 75 °F 1999
10 76 °F 2008
What's the most it has ever rained in Gilroy on 9/18?
For the date of Sep 18, the most precipitation ever recorded in Gilroy history is 0.28 inches which happened in 1959.
All-Time Most Precipitation in Gilroy on September 18
Rank Precipitation Year
1 0.28 inches 1959
2 0.10 inches 1989
2 0.10 inches 2022
4 0.01 inches 1986
Weather Station Details
Years Station Coordinates
1906–2023 Gilroy location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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