Napa August 31 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of August 31.
August 31 All-Time Records
1901–2024
Highest temperature 103 °F 1902
Lowest temperature 42 °F 2008
Lowest daily high 66 °F 1909
Highest daily low 61 °F 2007
Most precipitation 0.31 inches 1984
August 31 Average Weather
1991–2020 1
Average high 80.8 °F
Average low 52.9 °F
Chance precipitation 1.1%
Napa August 31 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 75 60 0.00 n/a
2022 83 52 0.00 n/a
2021 75 48 0.00 n/a
2020 75 51 0.00 n/a
2019 87 56 0.00 n/a
2018 80 50 0.00 n/a
2017 97 48 0.00 n/a
2016 79 50 0.00 n/a
2015 82 52 0.00 n/a
2014 84 50 0.00 n/a
2013 84 54 0.00 0.0
2012 71 54 0.00 n/a
2011 73 52 0.00 n/a
2010 86 51 0.00 n/a
2009 76 54 0.00 n/a
2008 78 42 0.00 n/a
2007 87 61 0.00 n/a
2006 87 50 0.00 n/a
2005 94 45 0.00 n/a
2004 82 50 0.00 n/a
2003 78 53 0.00 n/a
2002 90 46 0.00 n/a
2001 79 55 0.00 n/a
2000 72 55 0.00 n/a
1999 80 48 0.00 n/a
1998 95 53 0.00 0.0
1997 82 55 0.00 0.0
1996 94 55 0.00 0.0
1995 79 52 0.00 0.0
1994 77 58 0.00 0.0
1993 78 52 0.00 0.0
1992 76 56 0.00 0.0
1991 83 54 0.00 0.0
1990 82 54 0.00 0.0
1989 86 48 0.00 0.0
1988 79 53 0.00 0.0
1987 79 56 0.00 0.0
1986 82 55 0.00 0.0
1985 90 53 0.00 0.0
1984 85 51 0.31 0.0
1983 77 60 0.00 0.0
1982 92 50 0.00 0.0
1981 81 53 0.00 0.0
1980 80 49 0.00 0.0
1979 86 52 0.00 0.0
1978 81 57 0.00 0.0
1977 86 55 0.00 0.0
1976 96 54 0.00 0.0
1975 80 50 0.00 0.0
1974 76 55 0.00 0.0
1973 70 53 0.00 0.0
1972 86 53 0.00 0.0
1971 82 55 0.00 0.0
1970 80 48 0.00 0.0
1969 96 53 0.00 0.0
1968 86 59 0.00 0.0
1967 83 51 0.00 0.0
1966 74 55 0.03 0.0
1965 84 54 0.00 0.0
1964 70 50 0.06 0.0
1963 75 55 0.00 0.0
1962 79 50 0.00 0.0
1961 81 55 0.00 0.0
1960 77 51 0.00 0.0
1959 86 48 0.00 0.0
1958 87 55 0.00 0.0
1957 83 44 0.00 0.0
1956 75 53 0.00 0.0
1955 102 46 0.00 0.0
1954 95 49 0.00 0.0
1953 82 51 0.00 0.0
1952 99 50 0.00 0.0
1951 72 51 0.00 0.0
1950 87 50 0.00 0.0
1949 n/a n/a n/a n/a
1948 93 51 0.00 0.0
1947 99 48 0.00 n/a
1946 74 48 0.00 n/a
1945 91 46 0.00 n/a
1944 77 55 0.00 n/a
1943 100 54 0.00 n/a
1942 81 48 0.00 n/a
1941 80 53 0.00 n/a
1940 86 56 0.00 n/a
1939 80 42 0.00 n/a
1938 83 50 0.00 n/a
1937 70 54 0.00 n/a
1936 84 50 0.00 n/a
1935 76 52 0.00 n/a
1934 79 52 0.00 n/a
1933 n/a n/a 0.00 n/a
1932 97 49 0.00 n/a
1931 76 47 0.00 n/a
1930 78 52 0.00 n/a
1929 85 51 0.00 n/a
1928 71 44 0.00 n/a
1927 89 46 0.00 n/a
1926 84 54 0.00 n/a
1925 74 49 0.00 n/a
1924 74 46 0.00 n/a
1923 80 57 0.00 n/a
1922 92 50 0.00 n/a
1921 76 49 0.00 n/a
1920 85 50 0.00 n/a
1919 80 49 0.00 n/a
1918 87 53 0.00 n/a
1917 75 51 0.00 n/a
1916 n/a n/a n/a n/a
1915 n/a n/a n/a n/a
1914 70 56 0.00 n/a
1913 72 60 0.00 n/a
1912 82 54 n/a n/a
1911 73 46 0.00 n/a
1910 85 47 0.00 n/a
1909 66 55 0.00 n/a
1908 98 52 0.00 n/a
1907 77 57 0.00 n/a
1906 77 56 0.00 n/a
1905 89 53 0.00 n/a
1904 90 51 0.00 n/a
1903 99 49 0.00 n/a
1902 103 53 0.00 n/a
1901 73 52 0.00 n/a
What's the all-time high for Napa on 8/31?
For the date of Aug 31, the highest temperature ever reached in Napa history is 103 °F which happened in 1902.
Highest Temperatures in Napa on August 31
Rank Temperature Year
1 103 °F 1902
2 102 °F 1955
3 100 °F 1943
4 99 °F 1947
4 99 °F 1952
4 99 °F 1903
7 98 °F 1908
8 97 °F 2017
8 97 °F 1932
10 96 °F 1976
10 96 °F 1969
What's the all-time low for Napa on 8/31?
For the date of Aug 31, the lowest temperature ever reached in Napa history is 42 °F which has happened 2 times, most recently in 2008.
Lowest Temperatures in Napa on August 31
Rank Temperature Year
1 42 °F 2008
1 42 °F 1939
3 44 °F 1957
3 44 °F 1928
5 45 °F 2005
6 46 °F 1945
6 46 °F 2002
6 46 °F 1927
6 46 °F 1911
6 46 °F 1924
6 46 °F 1955
Lowest High Temperatures in Napa on August 31
Rank Temperature Year
1 66 °F 1909
2 70 °F 1914
2 70 °F 1964
2 70 °F 1973
2 70 °F 1937
6 71 °F 2012
6 71 °F 1928
8 72 °F 1913
8 72 °F 2000
8 72 °F 1951
What's the most it has ever rained in Napa on 8/31?
For the date of Aug 31, the most precipitation ever recorded in Napa history is 0.31 inches which happened in 1984.
All-Time Most Precipitation in Napa on August 31
Rank Precipitation Year
1 0.31 inches 1984
2 0.06 inches 1964
3 0.03 inches 1966
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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