Napa December 21 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of December 21.
December 21 All-Time Records
1901–2024
Highest temperature 71 °F 1999
Lowest temperature 23 °F 1990
Lowest daily high 38 °F 1990
Highest daily low 55 °F 2005
Most precipitation 2.25 inches 1996
December 21 Average Weather
1991–2020 1
Average high 57.0 °F
Average low 37.1 °F
Chance precipitation 33.8%
Napa December 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 65 47 0.00 n/a
2022 57 34 0.00 n/a
2021 48 42 0.30 n/a
2020 59 31 0.00 n/a
2019 60 40 0.00 n/a
2018 59 40 0.13 n/a
2017 61 30 0.00 n/a
2016 63 35 0.00 n/a
2015 58 47 0.75 n/a
2014 65 52 0.00 n/a
2013 63 31 0.00 n/a
2012 57 49 0.17 n/a
2011 58 27 0.00 n/a
2010 53 46 0.23 n/a
2009 57 42 0.06 n/a
2008 46 39 0.25 n/a
2007 56 27 0.00 n/a
2006 47 40 0.19 n/a
2005 60 55 0.46 n/a
2004 63 35 0.00 n/a
2003 60 39 0.00 n/a
2002 55 41 0.09 n/a
2001 52 42 0.00 n/a
2000 56 29 0.01 n/a
1999 71 35 0.00 n/a
1998 45 25 0.00 0.0
1997 57 38 0.00 0.0
1996 50 41 2.25 0.0
1995 57 35 0.00 0.0
1994 53 37 0.00 0.0
1993 47 31 0.00 0.0
1992 52 40 0.02 0.0
1991 56 30 0.00 0.0
1990 38 23 0.00 0.0
1989 45 31 0.00 0.0
1988 52 35 1.00 0.0
1987 50 38 0.00 0.0
1986 54 34 0.00 0.0
1985 48 33 0.00 0.0
1984 59 31 0.00 0.0
1983 51 30 0.00 0.0
1982 55 50 1.10 0.0
1981 65 50 0.04 0.0
1980 56 44 0.38 0.0
1979 62 47 0.56 0.0
1978 56 25 0.00 0.0
1977 55 49 0.09 0.0
1976 61 31 0.00 0.0
1975 57 36 0.05 0.0
1974 56 32 0.03 0.0
1973 56 47 0.86 0.0
1972 57 52 0.00 0.0
1971 48 42 0.01 0.0
1970 53 43 0.23 0.0
1969 64 53 0.66 0.0
1968 51 25 0.00 0.0
1967 49 n/a 0.00 0.0
1966 57 39 0.00 0.0
1965 43 24 0.00 0.0
1964 59 52 0.76 0.0
1963 52 33 0.00 0.0
1962 52 34 0.00 0.0
1961 65 46 0.07 0.0
1960 56 38 0.00 0.0
1959 61 33 0.00 0.0
1958 62 50 0.51 0.0
1957 56 51 0.07 0.0
1956 59 30 0.00 0.0
1955 61 54 0.19 0.0
1954 49 33 0.00 0.0
1953 68 35 0.00 0.0
1952 58 32 0.00 0.0
1951 57 28 0.00 0.0
1950 58 46 0.00 0.0
1949 52 26 0.00 0.0
1948 52 34 0.00 0.0
1947 57 45 0.00 n/a
1946 52 33 0.00 n/a
1945 58 40 0.80 n/a
1944 n/a n/a n/a n/a
1943 65 37 0.00 n/a
1942 52 39 0.00 n/a
1941 52 34 0.03 n/a
1940 61 53 2.05 n/a
1939 65 38 0.00 n/a
1938 62 33 0.00 n/a
1937 60 32 0.00 n/a
1936 55 41 0.09 n/a
1935 62 29 0.00 n/a
1934 61 44 0.00 n/a
1933 49 36 0.00 n/a
1932 59 40 0.52 n/a
1931 61 39 0.53 n/a
1930 63 30 0.00 n/a
1929 63 40 0.00 n/a
1928 62 26 0.00 n/a
1927 58 39 0.00 n/a
1926 45 38 0.35 n/a
1925 50 37 0.00 n/a
1924 44 38 2.10 n/a
1923 n/a 29 0.00 n/a
1922 60 34 0.00 n/a
1921 n/a n/a n/a n/a
1920 50 36 0.33 n/a
1919 56 40 0.00 n/a
1918 46 28 0.00 n/a
1917 43 36 0.00 n/a
1916 n/a n/a n/a n/a
1915 59 44 n/a n/a
1914 n/a n/a n/a n/a
1913 53 45 1.12 n/a
1912 55 39 0.00 n/a
1911 58 37 0.00 0.0
1910 57 37 0.00 n/a
1909 46 35 0.06 n/a
1908 42 30 n/a n/a
1907 54 37 n/a n/a
1906 50 42 n/a n/a
1905 51 34 0.00 n/a
1904 44 40 0.00 n/a
1903 58 43 n/a n/a
1902 58 33 n/a n/a
1901 66 32 0.00 n/a
What's the all-time high for Napa on 12/21?
For the date of Dec 21, the highest temperature ever reached in Napa history is 71 °F which happened in 1999.
Highest Temperatures in Napa on December 21
Rank Temperature Year
1 71 °F 1999
2 68 °F 1953
3 66 °F 1901
4 65 °F 2023
4 65 °F 1939
4 65 °F 1961
4 65 °F 1943
4 65 °F 1981
4 65 °F 2014
10 64 °F 1969
What's the all-time low for Napa on 12/21?
For the date of Dec 21, the lowest temperature ever reached in Napa history is 23 °F which happened in 1990.
Lowest Temperatures in Napa on December 21
Rank Temperature Year
1 23 °F 1990
2 24 °F 1965
3 25 °F 1978
3 25 °F 1998
3 25 °F 1968
6 26 °F 1928
6 26 °F 1949
8 27 °F 2007
8 27 °F 2011
10 28 °F 1918
10 28 °F 1951
Lowest High Temperatures in Napa on December 21
Rank Temperature Year
1 38 °F 1990
2 42 °F 1908
3 43 °F 1917
3 43 °F 1965
5 44 °F 1904
5 44 °F 1924
7 45 °F 1989
7 45 °F 1926
7 45 °F 1998
10 46 °F 1918
10 46 °F 2008
10 46 °F 1909
What's the most it has ever rained in Napa on 12/21?
For the date of Dec 21, the most precipitation ever recorded in Napa history is 2.25 inches which happened in 1996.
All-Time Most Precipitation in Napa on December 21
Rank Precipitation Year
1 2.25 inches 1996
2 2.10 inches 1924
3 2.05 inches 1940
4 1.12 inches 1913
5 1.10 inches 1982
6 1.00 inches 1988
7 0.86 inches 1973
8 0.80 inches 1945
9 0.76 inches 1964
10 0.75 inches 2015
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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