Napa August 20 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of August 20.
August 20 All-Time Records
1901–2024
Highest temperature 102 °F 1950
Lowest temperature 45 °F 1927
Lowest daily high 63 °F 1959
Highest daily low 62 °F 2023
Most precipitation 0.82 inches 1997
August 20 Average Weather
1991–2020 1
Average high 80.9 °F
Average low 53.6 °F
Chance precipitation 0.8%
Napa August 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 95 62 0.00 n/a
2022 84 55 0.00 n/a
2021 72 54 0.00 n/a
2020 83 57 0.00 n/a
2019 79 53 0.00 n/a
2018 69 55 0.00 n/a
2017 76 60 0.00 n/a
2016 76 55 0.00 n/a
2015 74 58 0.00 n/a
2014 72 60 0.00 n/a
2013 77 59 0.00 0.0
2012 73 54 0.00 n/a
2011 70 55 0.00 n/a
2010 72 51 0.00 n/a
2009 75 52 0.00 n/a
2008 83 53 0.00 n/a
2007 87 55 0.00 n/a
2006 72 54 0.00 n/a
2005 74 51 0.00 n/a
2004 76 56 0.00 n/a
2003 79 50 0.00 n/a
2002 82 53 0.00 n/a
2001 69 53 0.00 n/a
2000 80 46 0.00 n/a
1999 76 53 0.00 n/a
1998 75 56 0.00 0.0
1997 80 55 0.82 0.0
1996 77 49 0.00 0.0
1995 95 58 0.00 0.0
1994 82 55 0.00 0.0
1993 81 56 0.00 0.0
1992 84 55 0.00 0.0
1991 79 54 0.00 0.0
1990 79 57 0.00 0.0
1989 74 55 0.00 0.0
1988 77 53 0.00 0.0
1987 77 48 0.00 0.0
1986 79 60 0.00 0.0
1985 77 58 0.00 0.0
1984 76 57 0.00 0.0
1983 80 59 0.52 0.0
1982 83 55 0.00 0.0
1981 81 49 0.00 0.0
1980 81 53 0.00 0.0
1979 77 56 0.00 0.0
1978 91 51 0.00 0.0
1977 76 54 0.00 0.0
1976 86 61 0.00 0.0
1975 83 52 0.00 0.0
1974 88 54 0.00 0.0
1973 82 50 0.00 0.0
1972 85 59 0.00 0.0
1971 81 57 0.00 0.0
1970 71 50 0.00 0.0
1969 94 48 0.00 0.0
1968 70 51 0.00 0.0
1967 79 49 0.00 0.0
1966 71 52 0.00 0.0
1965 84 51 0.00 0.0
1964 95 58 0.00 0.0
1963 93 53 0.00 0.0
1962 91 54 0.00 0.0
1961 87 62 0.00 0.0
1960 85 52 0.00 0.0
1959 63 53 0.00 0.0
1958 85 55 0.00 0.0
1957 75 55 0.00 0.0
1956 76 55 0.00 0.0
1955 85 47 0.00 0.0
1954 77 56 0.00 0.0
1953 80 50 0.00 0.0
1952 86 51 0.00 0.0
1951 77 50 0.00 0.0
1950 102 56 0.00 0.0
1949 82 53 0.00 0.0
1948 92 51 0.00 0.0
1947 88 47 0.00 n/a
1946 80 51 0.00 n/a
1945 96 52 0.00 n/a
1944 75 49 0.00 n/a
1943 77 48 0.00 n/a
1942 86 56 0.00 n/a
1941 72 55 0.00 n/a
1940 82 50 0.00 n/a
1939 80 53 0.00 n/a
1938 82 46 0.00 n/a
1937 79 48 0.00 n/a
1936 69 54 0.00 n/a
1935 82 47 0.00 n/a
1934 84 49 0.00 n/a
1933 n/a n/a 0.00 n/a
1932 80 49 0.00 n/a
1931 83 51 0.00 n/a
1930 91 47 0.00 n/a
1929 79 53 0.00 n/a
1928 82 47 0.00 n/a
1927 85 45 0.00 n/a
1926 80 53 0.00 n/a
1925 74 47 0.00 n/a
1924 81 55 0.16 n/a
1923 79 54 0.00 n/a
1922 81 57 0.00 n/a
1921 80 50 0.00 n/a
1920 75 46 0.00 n/a
1919 84 53 0.00 n/a
1918 90 45 0.00 n/a
1917 85 55 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 84 58 0.00 n/a
1912 76 54 n/a n/a
1911 90 48 0.00 n/a
1910 78 47 0.00 n/a
1909 71 54 0.00 n/a
1908 81 57 0.00 n/a
1907 83 56 0.00 n/a
1906 77 58 0.00 n/a
1905 78 60 0.00 n/a
1904 93 49 0.00 n/a
1903 78 48 0.00 n/a
1902 84 51 0.00 n/a
1901 71 48 0.00 n/a
What's the all-time high for Napa on 8/20?
For the date of Aug 20, the highest temperature ever reached in Napa history is 102 °F which happened in 1950.
Highest Temperatures in Napa on August 20
Rank Temperature Year
1 102 °F 1950
2 96 °F 1945
3 95 °F 1964
3 95 °F 1995
3 95 °F 2023
6 94 °F 1969
7 93 °F 1963
7 93 °F 1904
9 92 °F 1948
10 91 °F 1962
10 91 °F 1978
10 91 °F 1930
What's the all-time low for Napa on 8/20?
For the date of Aug 20, the lowest temperature ever reached in Napa history is 45 °F which has happened 2 times, most recently in 1927.
Lowest Temperatures in Napa on August 20
Rank Temperature Year
1 45 °F 1927
1 45 °F 1918
3 46 °F 2000
3 46 °F 1920
3 46 °F 1938
6 47 °F 1955
6 47 °F 1935
6 47 °F 1928
6 47 °F 1930
6 47 °F 1947
6 47 °F 1910
6 47 °F 1925
Lowest High Temperatures in Napa on August 20
Rank Temperature Year
1 63 °F 1959
2 69 °F 2001
2 69 °F 2018
2 69 °F 1936
5 70 °F 1968
5 70 °F 2011
7 71 °F 1966
7 71 °F 1901
7 71 °F 1970
7 71 °F 1909
What's the most it has ever rained in Napa on 8/20?
For the date of Aug 20, the most precipitation ever recorded in Napa history is 0.82 inches which happened in 1997.
All-Time Most Precipitation in Napa on August 20
Rank Precipitation Year
1 0.82 inches 1997
2 0.52 inches 1983
3 0.16 inches 1924
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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