Napa September 28 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of September 28.
September 28 All-Time Records
1901–2024
Highest temperature 103 °F 2020
Lowest temperature 40 °F 2001
Lowest daily high 62 °F 1926
Highest daily low 69 °F 1945
Most precipitation 0.70 inches 1957
September 28 Average Weather
1991–2020 1
Average high 79.3 °F
Average low 48.8 °F
Chance precipitation 5.4%
Napa September 28 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 81 50 0.00 n/a
2022 80 48 0.00 n/a
2021 83 48 0.00 n/a
2020 103 60 0.00 n/a
2019 75 45 0.00 n/a
2018 71 53 0.00 n/a
2017 86 47 0.00 0.0
2016 74 48 0.00 n/a
2015 72 44 0.00 n/a
2014 74 52 0.00 n/a
2013 81 45 0.00 n/a
2012 69 47 0.00 n/a
2011 95 53 0.00 n/a
2010 100 50 0.00 n/a
2009 71 50 0.00 n/a
2008 77 51 0.00 n/a
2007 72 44 0.00 n/a
2006 69 50 0.00 n/a
2005 88 42 0.00 n/a
2004 70 53 0.00 n/a
2003 74 47 0.00 n/a
2002 70 48 0.00 n/a
2001 77 40 0.00 n/a
2000 67 53 0.00 n/a
1999 95 49 0.00 n/a
1998 76 54 0.04 0.0
1997 97 55 0.00 0.0
1996 78 48 0.00 0.0
1995 74 44 0.00 0.0
1994 77 56 0.00 0.0
1993 91 52 0.00 0.0
1992 91 52 0.00 0.0
1991 86 55 0.00 0.0
1990 80 55 0.00 0.0
1989 74 53 0.00 0.0
1988 88 48 0.00 0.0
1987 87 50 0.00 0.0
1986 78 47 0.00 0.0
1985 71 55 0.00 0.0
1984 92 52 0.00 0.0
1983 78 53 0.00 0.0
1982 77 48 0.00 0.0
1981 77 50 0.00 0.0
1980 83 48 0.00 0.0
1979 89 48 0.00 0.0
1978 92 51 0.00 0.0
1977 71 61 0.07 0.0
1976 71 60 0.67 0.0
1975 71 48 0.00 0.0
1974 76 49 0.00 0.0
1973 94 54 0.00 0.0
1972 82 53 0.00 0.0
1971 71 42 0.00 0.0
1970 98 52 0.00 0.0
1969 88 48 0.00 0.0
1968 90 51 0.00 0.0
1967 73 54 0.00 0.0
1966 102 68 0.00 0.0
1965 77 45 0.00 0.0
1964 73 42 0.00 0.0
1963 85 54 0.00 0.0
1962 68 54 0.00 0.0
1961 78 55 0.00 0.0
1960 73 48 0.00 0.0
1959 88 52 0.00 0.0
1958 95 54 0.00 0.0
1957 n/a 58 0.70 0.0
1956 92 48 0.00 0.0
1955 74 47 0.00 0.0
1954 71 51 0.00 0.0
1953 81 56 0.00 0.0
1952 83 48 0.00 0.0
1951 72 52 0.00 0.0
1950 85 50 0.00 0.0
1949 80 47 0.00 0.0
1948 83 45 0.00 0.0
1947 83 52 0.00 n/a
1946 97 47 0.00 n/a
1945 94 69 0.00 n/a
1944 71 50 0.00 n/a
1943 78 49 0.00 n/a
1942 78 44 0.00 n/a
1941 85 44 0.00 n/a
1940 83 44 0.00 n/a
1939 78 47 0.00 n/a
1938 76 54 0.00 n/a
1937 69 51 0.00 n/a
1936 75 43 0.00 n/a
1935 71 51 0.00 n/a
1934 86 45 0.00 n/a
1933 n/a n/a 0.00 n/a
1932 78 44 0.00 n/a
1931 77 40 0.00 n/a
1930 80 42 0.00 n/a
1929 79 40 0.00 n/a
1928 78 44 0.00 n/a
1927 81 52 0.00 n/a
1926 62 43 0.00 n/a
1925 68 49 0.00 n/a
1924 94 45 0.00 n/a
1923 80 46 0.00 n/a
1922 82 42 0.00 n/a
1921 102 56 0.00 n/a
1920 94 50 0.00 n/a
1919 64 51 0.16 n/a
1918 77 54 0.00 n/a
1917 100 51 0.00 n/a
1916 n/a n/a n/a n/a
1915 n/a n/a n/a n/a
1914 65 51 0.00 n/a
1913 79 51 0.00 n/a
1912 80 60 0.00 n/a
1911 79 44 0.00 n/a
1910 69 53 0.00 n/a
1909 68 54 0.24 n/a
1908 91 49 0.00 n/a
1907 80 49 0.01 n/a
1906 86 53 0.00 n/a
1905 70 46 0.00 n/a
1904 89 61 0.00 n/a
1903 64 56 0.00 n/a
1902 89 45 0.00 n/a
1901 88 48 0.00 n/a
What's the all-time high for Napa on 9/28?
For the date of Sep 28, the highest temperature ever reached in Napa history is 103 °F which happened in 2020.
Highest Temperatures in Napa on September 28
Rank Temperature Year
1 103 °F 2020
2 102 °F 1921
2 102 °F 1966
4 100 °F 1917
4 100 °F 2010
6 98 °F 1970
7 97 °F 1997
7 97 °F 1946
9 95 °F 1999
9 95 °F 2011
9 95 °F 1958
What's the all-time low for Napa on 9/28?
For the date of Sep 28, the lowest temperature ever reached in Napa history is 40 °F which has happened 3 times, most recently in 2001.
Lowest Temperatures in Napa on September 28
Rank Temperature Year
1 40 °F 2001
1 40 °F 1931
1 40 °F 1929
4 42 °F 1922
4 42 °F 2005
4 42 °F 1971
4 42 °F 1964
4 42 °F 1930
9 43 °F 1926
9 43 °F 1936
Lowest High Temperatures in Napa on September 28
Rank Temperature Year
1 62 °F 1926
2 64 °F 1919
2 64 °F 1903
4 65 °F 1914
5 67 °F 2000
6 68 °F 1909
6 68 °F 1925
6 68 °F 1962
9 69 °F 1937
9 69 °F 2006
9 69 °F 2012
9 69 °F 1910
What's the most it has ever rained in Napa on 9/28?
For the date of Sep 28, the most precipitation ever recorded in Napa history is 0.70 inches which happened in 1957.
All-Time Most Precipitation in Napa on September 28
Rank Precipitation Year
1 0.70 inches 1957
2 0.67 inches 1976
3 0.24 inches 1909
4 0.16 inches 1919
5 0.07 inches 1977
6 0.04 inches 1998
7 0.01 inches 1907
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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