Napa December 20 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of December 20.
December 20 All-Time Records
1901–2024
Highest temperature 72 °F 1958
Lowest temperature 23 °F 1990
Lowest daily high 43 °F 1990
Highest daily low 54 °F 1969
Most precipitation 2.15 inches 1955
December 20 Average Weather
1991–2020 1
Average high 57.0 °F
Average low 37.2 °F
Chance precipitation 34.4%
Napa December 20 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 59 53 0.53 n/a
2022 55 36 0.00 n/a
2021 48 42 0.00 n/a
2020 60 32 0.00 n/a
2019 55 40 0.00 n/a
2018 55 42 0.01 n/a
2017 57 32 0.05 n/a
2016 59 32 0.00 n/a
2015 52 30 0.78 n/a
2014 58 50 0.00 n/a
2013 59 29 0.00 n/a
2012 60 28 0.00 n/a
2011 58 26 0.00 n/a
2010 54 45 1.11 n/a
2009 55 43 0.04 n/a
2008 50 25 0.00 n/a
2007 56 30 0.42 n/a
2006 52 27 0.00 n/a
2005 61 46 0.28 n/a
2004 49 31 0.00 n/a
2003 54 48 0.06 n/a
2002 55 43 0.76 n/a
2001 53 45 0.38 n/a
2000 59 35 0.00 n/a
1999 67 38 0.00 n/a
1998 50 31 0.00 0.0
1997 64 36 0.00 0.0
1996 55 31 0.00 0.0
1995 58 38 0.00 0.0
1994 50 41 0.00 0.0
1993 54 31 0.00 0.0
1992 49 40 0.00 0.0
1991 56 33 0.00 0.0
1990 43 23 0.00 0.0
1989 50 31 0.00 0.0
1988 50 48 0.12 0.0
1987 54 33 0.00 0.0
1986 57 35 0.52 0.0
1985 49 30 0.00 0.0
1984 53 30 0.00 0.0
1983 57 35 0.00 0.0
1982 55 41 0.22 0.0
1981 63 53 1.70 0.0
1980 65 43 0.00 0.0
1979 54 46 0.27 0.0
1978 54 26 0.00 0.0
1977 55 40 0.00 0.0
1976 61 32 0.00 0.0
1975 59 32 0.00 0.0
1974 58 33 0.00 0.0
1973 52 38 0.00 0.0
1972 58 52 0.04 0.0
1971 50 29 0.00 0.0
1970 49 31 0.64 0.0
1969 64 54 1.46 0.0
1968 51 27 0.00 0.0
1967 n/a n/a 0.00 0.0
1966 47 40 0.00 0.0
1965 49 26 0.00 0.0
1964 60 52 0.46 0.0
1963 56 32 0.16 0.0
1962 59 39 0.00 0.0
1961 66 38 0.08 0.0
1960 58 37 0.00 0.0
1959 56 38 0.00 0.0
1958 72 37 0.00 0.0
1957 56 38 0.00 0.0
1956 59 27 0.00 0.0
1955 61 52 2.15 0.0
1954 51 31 0.00 0.0
1953 67 52 0.07 0.0
1952 58 37 1.04 0.0
1951 52 38 0.01 0.0
1950 62 50 0.06 0.0
1949 57 31 0.00 0.0
1948 50 30 0.00 0.0
1947 56 44 0.20 n/a
1946 50 33 0.00 n/a
1945 55 41 0.10 n/a
1944 n/a n/a n/a n/a
1943 62 47 0.82 n/a
1942 52 40 0.15 n/a
1941 59 43 0.04 n/a
1940 63 52 0.06 n/a
1939 66 35 0.00 n/a
1938 54 47 0.00 n/a
1937 69 47 0.00 n/a
1936 50 31 0.00 n/a
1935 61 29 0.00 n/a
1934 57 39 0.00 n/a
1933 57 39 0.00 n/a
1932 63 31 0.00 n/a
1931 64 45 0.15 n/a
1930 61 41 0.00 n/a
1929 72 54 0.00 n/a
1928 62 26 0.00 n/a
1927 52 31 0.00 n/a
1926 46 31 0.00 n/a
1925 58 37 0.00 n/a
1924 44 30 0.00 n/a
1923 n/a 31 0.00 n/a
1922 59 36 0.00 n/a
1921 n/a n/a n/a n/a
1920 59 32 0.00 n/a
1919 58 39 0.00 n/a
1918 55 30 0.00 n/a
1917 58 43 0.00 n/a
1916 n/a n/a n/a n/a
1915 59 37 n/a n/a
1914 n/a n/a n/a n/a
1913 49 44 0.12 n/a
1912 61 45 0.00 n/a
1911 49 34 0.00 0.0
1910 56 39 0.00 n/a
1909 44 39 0.14 n/a
1908 43 29 n/a n/a
1907 54 38 0.31 n/a
1906 48 45 n/a n/a
1905 49 39 0.05 n/a
1904 51 39 0.00 n/a
1903 57 42 n/a n/a
1902 56 33 n/a n/a
1901 62 30 0.00 n/a
What's the all-time high for Napa on 12/20?
For the date of Dec 20, the highest temperature ever reached in Napa history is 72 °F which has happened 2 times, most recently in 1958.
Highest Temperatures in Napa on December 20
Rank Temperature Year
1 72 °F 1929
1 72 °F 1958
3 69 °F 1937
4 67 °F 1953
4 67 °F 1999
6 66 °F 1961
6 66 °F 1939
8 65 °F 1980
9 64 °F 1969
9 64 °F 1997
9 64 °F 1931
What's the all-time low for Napa on 12/20?
For the date of Dec 20, the lowest temperature ever reached in Napa history is 23 °F which happened in 1990.
Lowest Temperatures in Napa on December 20
Rank Temperature Year
1 23 °F 1990
2 25 °F 2008
3 26 °F 2011
3 26 °F 1965
3 26 °F 1928
3 26 °F 1978
7 27 °F 1968
7 27 °F 2006
7 27 °F 1956
10 28 °F 2012
Lowest High Temperatures in Napa on December 20
Rank Temperature Year
1 43 °F 1990
1 43 °F 1908
3 44 °F 1924
3 44 °F 1909
5 46 °F 1926
6 47 °F 1966
7 48 °F 2021
7 48 °F 1906
9 49 °F 1905
9 49 °F 1970
9 49 °F 2004
9 49 °F 1913
9 49 °F 1985
9 49 °F 1965
9 49 °F 1911
9 49 °F 1992
What's the most it has ever rained in Napa on 12/20?
For the date of Dec 20, the most precipitation ever recorded in Napa history is 2.15 inches which happened in 1955.
All-Time Most Precipitation in Napa on December 20
Rank Precipitation Year
1 2.15 inches 1955
2 1.70 inches 1981
3 1.46 inches 1969
4 1.11 inches 2010
5 1.04 inches 1952
6 0.82 inches 1943
7 0.78 inches 2015
8 0.76 inches 2002
9 0.64 inches 1970
10 0.53 inches 2023
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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