Napa September 27 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of September 27.
September 27 All-Time Records
1901–2024
Highest temperature 101 °F 2020
Lowest temperature 40 °F 1955
Lowest daily high 67 °F 2019
Highest daily low 68 °F 1945
Most precipitation 0.52 inches 1957
September 27 Average Weather
1991–2020 1
Average high 79.3 °F
Average low 49.0 °F
Chance precipitation 5.5%
Napa September 27 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 85 48 0.00 n/a
2022 75 54 0.00 n/a
2021 77 53 0.00 n/a
2020 101 60 0.00 n/a
2019 67 55 0.00 n/a
2018 73 45 0.00 n/a
2017 93 50 0.00 0.0
2016 90 52 0.00 n/a
2015 75 50 0.00 n/a
2014 77 49 0.00 n/a
2013 78 48 0.00 n/a
2012 81 46 0.00 n/a
2011 88 47 0.00 n/a
2010 97 49 0.00 n/a
2009 93 50 0.00 n/a
2008 92 48 0.00 n/a
2007 83 47 0.00 n/a
2006 72 53 0.00 n/a
2005 78 45 0.00 n/a
2004 70 45 0.00 n/a
2003 73 47 0.00 n/a
2002 68 48 0.00 n/a
2001 76 50 0.00 n/a
2000 71 54 0.00 n/a
1999 93 47 0.00 n/a
1998 67 52 0.09 0.0
1997 88 54 0.00 0.0
1996 72 48 0.00 0.0
1995 79 52 0.00 0.0
1994 77 54 0.00 0.0
1993 96 50 0.00 0.0
1992 92 52 0.00 0.0
1991 73 55 0.00 0.0
1990 78 53 0.00 0.0
1989 76 48 0.00 0.0
1988 84 50 0.00 0.0
1987 88 48 0.00 0.0
1986 72 51 0.20 0.0
1985 79 54 0.00 0.0
1984 95 54 0.00 0.0
1983 75 57 0.00 0.0
1982 81 48 0.00 0.0
1981 79 61 0.00 0.0
1980 72 49 0.00 0.0
1979 83 50 0.00 0.0
1978 80 58 0.00 0.0
1977 75 61 0.00 0.0
1976 71 52 0.00 0.0
1975 74 48 0.00 0.0
1974 73 51 0.00 0.0
1973 96 54 0.00 0.0
1972 73 60 0.22 0.0
1971 73 42 0.00 0.0
1970 99 50 0.00 0.0
1969 74 54 0.00 0.0
1968 92 51 0.00 0.0
1967 80 52 0.00 0.0
1966 93 59 0.00 0.0
1965 67 56 0.00 0.0
1964 68 49 0.00 0.0
1963 97 56 0.00 0.0
1962 69 50 0.01 0.0
1961 92 49 0.00 0.0
1960 80 51 0.00 0.0
1959 82 49 0.00 0.0
1958 101 55 0.00 0.0
1957 n/a 46 0.52 0.0
1956 80 50 0.00 0.0
1955 71 40 0.00 0.0
1954 79 49 0.00 0.0
1953 72 48 0.00 0.0
1952 85 53 0.00 0.0
1951 72 46 0.00 0.0
1950 91 54 0.00 0.0
1949 71 50 0.00 0.0
1948 82 41 0.00 0.0
1947 76 52 0.00 n/a
1946 94 48 0.00 n/a
1945 87 68 0.00 n/a
1944 93 50 0.00 n/a
1943 79 54 0.00 n/a
1942 79 44 0.00 n/a
1941 84 53 0.00 n/a
1940 82 46 0.00 n/a
1939 80 55 0.00 n/a
1938 77 58 0.11 n/a
1937 74 50 0.00 n/a
1936 74 49 0.00 n/a
1935 72 46 0.00 n/a
1934 84 40 0.00 n/a
1933 n/a n/a 0.00 n/a
1932 77 44 0.00 n/a
1931 82 45 0.00 n/a
1930 78 48 0.00 n/a
1929 78 42 0.00 n/a
1928 68 49 0.00 n/a
1927 73 52 0.00 n/a
1926 82 41 0.00 n/a
1925 69 50 0.00 n/a
1924 88 44 0.00 n/a
1923 74 51 0.00 n/a
1922 79 48 0.00 n/a
1921 101 54 0.00 n/a
1920 90 45 0.00 n/a
1919 70 48 0.00 n/a
1918 85 47 0.00 n/a
1917 96 47 0.00 n/a
1916 n/a n/a n/a n/a
1915 n/a n/a n/a n/a
1914 78 51 0.00 n/a
1913 85 50 0.00 n/a
1912 78 55 0.00 n/a
1911 78 43 0.00 n/a
1910 68 50 0.00 n/a
1909 74 55 n/a n/a
1908 93 48 0.00 n/a
1907 81 49 0.00 n/a
1906 91 53 0.00 n/a
1905 69 59 0.00 n/a
1904 79 53 0.00 n/a
1903 69 53 0.00 n/a
1902 88 49 0.00 n/a
1901 83 47 0.00 n/a
What's the all-time high for Napa on 9/27?
For the date of Sep 27, the highest temperature ever reached in Napa history is 101 °F which has happened 3 times, most recently in 2020.
Highest Temperatures in Napa on September 27
Rank Temperature Year
1 101 °F 1958
1 101 °F 1921
1 101 °F 2020
4 99 °F 1970
5 97 °F 1963
5 97 °F 2010
7 96 °F 1993
7 96 °F 1973
7 96 °F 1917
10 95 °F 1984
What's the all-time low for Napa on 9/27?
For the date of Sep 27, the lowest temperature ever reached in Napa history is 40 °F which has happened 2 times, most recently in 1955.
Lowest Temperatures in Napa on September 27
Rank Temperature Year
1 40 °F 1955
1 40 °F 1934
3 41 °F 1926
3 41 °F 1948
5 42 °F 1929
5 42 °F 1971
7 43 °F 1911
8 44 °F 1924
8 44 °F 1932
8 44 °F 1942
Lowest High Temperatures in Napa on September 27
Rank Temperature Year
1 67 °F 1965
1 67 °F 2019
1 67 °F 1998
4 68 °F 2002
4 68 °F 1910
4 68 °F 1928
4 68 °F 1964
8 69 °F 1925
8 69 °F 1905
8 69 °F 1903
8 69 °F 1962
What's the most it has ever rained in Napa on 9/27?
For the date of Sep 27, the most precipitation ever recorded in Napa history is 0.52 inches which happened in 1957.
All-Time Most Precipitation in Napa on September 27
Rank Precipitation Year
1 0.52 inches 1957
2 0.22 inches 1972
3 0.20 inches 1986
4 0.11 inches 1938
5 0.09 inches 1998
6 0.01 inches 1962
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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