Napa September 9 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of September 9.
September 9 All-Time Records
1901–2024
Highest temperature 109 °F 1944
Lowest temperature 40 °F 1931
Lowest daily high 63 °F 2020
Highest daily low 70 °F 1973
Most precipitation 0.33 inches 1978
September 9 Average Weather
1991–2020 1
Average high 81.1 °F
Average low 51.5 °F
Chance precipitation 2.0%
Napa September 9 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 83 46 0.00 n/a
2022 89 60 0.00 n/a
2021 77 56 0.00 n/a
2020 63 60 0.00 n/a
2019 82 48 0.00 n/a
2018 81 49 0.00 n/a
2017 80 n/a 0.00 0.0
2016 75 54 0.00 n/a
2015 99 52 0.00 n/a
2014 78 52 0.00 n/a
2013 86 51 0.00 n/a
2012 80 44 0.00 n/a
2011 78 52 0.00 n/a
2010 75 45 0.00 n/a
2009 78 45 0.00 n/a
2008 69 58 0.00 n/a
2007 77 57 0.00 n/a
2006 67 55 0.00 n/a
2005 65 54 0.00 n/a
2004 84 52 0.00 n/a
2003 74 54 0.00 n/a
2002 92 43 0.00 n/a
2001 70 52 0.00 n/a
2000 72 55 0.00 n/a
1999 72 57 0.01 n/a
1998 71 54 0.00 0.0
1997 85 59 0.00 0.0
1996 93 50 0.00 0.0
1995 76 56 0.00 0.0
1994 79 50 0.00 0.0
1993 82 55 0.00 0.0
1992 87 55 0.00 0.0
1991 69 50 0.00 0.0
1990 86 51 0.00 0.0
1989 75 52 0.00 0.0
1988 73 54 0.00 0.0
1987 75 57 0.00 0.0
1986 79 n/a 0.00 0.0
1985 67 52 0.15 0.0
1984 101 62 0.00 0.0
1983 91 48 0.00 0.0
1982 82 52 0.00 0.0
1981 81 53 0.00 0.0
1980 75 54 0.00 0.0
1979 93 52 0.00 0.0
1978 77 61 0.33 0.0
1977 94 56 0.00 0.0
1976 102 57 0.00 0.0
1975 75 58 0.00 0.0
1974 86 50 0.00 0.0
1973 95 70 0.00 0.0
1972 74 50 0.00 0.0
1971 90 49 0.00 0.0
1970 92 54 0.00 0.0
1969 89 55 0.00 0.0
1968 80 50 0.00 0.0
1967 83 50 0.00 0.0
1966 86 48 0.00 0.0
1965 82 48 0.00 0.0
1964 78 47 0.00 0.0
1963 85 54 0.00 0.0
1962 71 51 0.00 0.0
1961 78 46 0.00 0.0
1960 92 59 0.00 0.0
1959 74 56 0.00 0.0
1958 83 52 0.00 0.0
1957 n/a 54 0.00 0.0
1956 84 60 0.00 0.0
1955 85 50 0.00 0.0
1954 85 48 0.00 0.0
1953 95 51 0.00 0.0
1952 78 55 0.00 0.0
1951 102 52 0.00 0.0
1950 74 51 0.00 0.0
1949 79 53 0.00 0.0
1948 94 45 0.00 0.0
1947 n/a n/a 0.00 n/a
1946 88 46 0.00 n/a
1945 93 53 0.00 n/a
1944 109 63 0.00 n/a
1943 75 56 0.00 n/a
1942 74 54 0.00 n/a
1941 85 47 0.00 n/a
1940 80 52 0.00 n/a
1939 97 51 0.00 n/a
1938 97 49 0.00 n/a
1937 86 50 0.00 n/a
1936 95 54 0.00 n/a
1935 74 52 0.00 n/a
1934 79 53 0.00 n/a
1933 n/a n/a 0.00 n/a
1932 105 45 0.00 n/a
1931 74 40 0.00 n/a
1930 73 50 0.00 n/a
1929 91 46 0.00 n/a
1928 64 43 0.00 n/a
1927 67 49 0.00 n/a
1926 73 46 0.00 n/a
1925 72 48 0.00 n/a
1924 84 55 0.00 n/a
1923 82 53 0.00 n/a
1922 99 54 0.00 n/a
1921 76 52 0.00 n/a
1920 72 42 0.00 n/a
1919 78 47 0.00 n/a
1918 74 46 0.00 n/a
1917 88 55 0.00 n/a
1916 n/a n/a n/a n/a
1915 n/a n/a n/a n/a
1914 90 49 0.00 n/a
1913 85 57 0.00 n/a
1912 88 54 0.00 n/a
1911 68 50 0.00 n/a
1910 92 48 0.00 n/a
1909 82 50 n/a n/a
1908 100 51 0.00 n/a
1907 77 57 0.00 n/a
1906 80 61 0.00 n/a
1905 84 61 0.00 n/a
1904 99 64 0.00 n/a
1903 103 49 0.00 n/a
1902 84 55 0.00 n/a
1901 83 44 0.00 n/a
What's the all-time high for Napa on 9/9?
For the date of Sep 9, the highest temperature ever reached in Napa history is 109 °F which happened in 1944.
Highest Temperatures in Napa on September 9
Rank Temperature Year
1 109 °F 1944
2 105 °F 1932
3 103 °F 1903
4 102 °F 1976
4 102 °F 1951
6 101 °F 1984
7 100 °F 1908
8 99 °F 1922
8 99 °F 2015
8 99 °F 1904
What's the all-time low for Napa on 9/9?
For the date of Sep 9, the lowest temperature ever reached in Napa history is 40 °F which happened in 1931.
Lowest Temperatures in Napa on September 9
Rank Temperature Year
1 40 °F 1931
2 42 °F 1920
3 43 °F 2002
3 43 °F 1928
5 44 °F 1901
5 44 °F 2012
7 45 °F 2009
7 45 °F 1932
7 45 °F 2010
7 45 °F 1948
Lowest High Temperatures in Napa on September 9
Rank Temperature Year
1 63 °F 2020
2 64 °F 1928
3 65 °F 2005
4 67 °F 1985
4 67 °F 2006
4 67 °F 1927
7 68 °F 1911
8 69 °F 2008
8 69 °F 1991
10 70 °F 2001
What's the most it has ever rained in Napa on 9/9?
For the date of Sep 9, the most precipitation ever recorded in Napa history is 0.33 inches which happened in 1978.
All-Time Most Precipitation in Napa on September 9
Rank Precipitation Year
1 0.33 inches 1978
2 0.15 inches 1985
3 0.01 inches 1999
Weather Station Details
Years Station Coordinates
1999–2024 Napa County Airport location
1901–1998 Napa State Hospital location
Notes
1: Daily averages are a moving average which includes 14 days before and after the date.
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