Napa April 21 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of April 21.
April 21 All-Time Records
1901–2024
Highest temperature 91 °F 2009
Lowest temperature 30 °F 2008
Lowest daily high 52 °F 1967
Highest daily low 59 °F 1982
Most precipitation 0.58 inches 1955
April 21 Average Weather
1991–2020 1
Average high 69.8 °F
Average low 43.8 °F
Chance precipitation 20.5%
Napa April 21 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 77 45 0.00 n/a
2023 78 45 0.00 n/a
2022 63 46 0.09 n/a
2021 64 48 0.00 n/a
2020 70 38 0.00 n/a
2019 71 41 0.00 n/a
2018 n/a n/a 0.00 n/a
2017 77 44 0.00 n/a
2016 68 52 0.00 n/a
2015 56 50 0.00 n/a
2014 69 41 0.00 n/a
2013 83 40 0.00 n/a
2012 86 52 0.00 n/a
2011 65 44 0.03 n/a
2010 58 38 0.08 n/a
2009 91 48 0.00 n/a
2008 60 30 0.00 n/a
2007 58 35 0.31 n/a
2006 67 44 0.00 n/a
2005 73 37 0.00 n/a
2004 65 42 0.03 n/a
2003 59 45 0.02 n/a
2002 72 39 0.00 n/a
2001 66 34 0.00 n/a
2000 70 42 0.00 n/a
1999 65 44 0.00 n/a
1998 85 47 0.00 0.0
1997 71 57 0.03 0.0
1996 63 40 0.00 0.0
1995 71 44 0.00 0.0
1994 70 44 0.00 0.0
1993 69 48 0.00 0.0
1992 72 45 0.00 0.0
1991 70 51 0.07 0.0
1990 70 52 0.00 0.0
1989 69 55 0.05 0.0
1988 64 42 0.00 0.0
1987 88 47 0.00 0.0
1986 83 51 0.00 0.0
1985 61 47 0.05 0.0
1984 80 45 0.00 0.0
1983 65 49 0.00 0.0
1982 86 59 0.00 0.0
1981 76 44 0.00 0.0
1980 62 38 0.03 0.0
1979 71 39 0.00 0.0
1978 67 36 0.00 0.0
1977 84 35 0.00 0.0
1976 76 41 0.00 0.0
1975 73 42 0.00 0.0
1974 70 43 0.00 0.0
1973 79 48 0.00 0.0
1972 71 39 0.00 0.0
1971 61 32 0.00 0.0
1970 63 35 0.00 0.0
1969 74 46 0.00 0.0
1968 75 36 0.00 0.0
1967 52 36 0.47 0.0
1966 74 39 0.00 0.0
1965 75 53 0.13 0.0
1964 69 41 0.00 0.0
1963 61 30 0.01 0.0
1962 78 41 0.00 0.0
1961 58 41 0.18 0.0
1960 68 41 0.00 0.0
1959 69 47 0.00 0.0
1958 82 48 0.00 0.0
1957 64 47 0.00 0.0
1956 76 47 0.00 0.0
1955 63 48 0.58 0.0
1954 82 45 0.00 0.0
1953 72 52 0.00 0.0
1952 79 40 0.00 0.0
1951 65 47 0.00 0.0
1950 79 49 0.00 0.0
1949 83 46 0.00 0.0
1948 62 45 0.00 n/a
1947 68 42 0.00 n/a
1946 75 39 0.00 n/a
1945 70 40 0.00 n/a
1944 69 33 0.00 n/a
1943 73 56 0.00 n/a
1942 73 47 0.00 n/a
1941 74 40 0.00 n/a
1940 77 43 0.00 n/a
1939 71 46 0.00 n/a
1938 68 42 0.00 n/a
1937 67 44 0.00 n/a
1936 62 48 0.04 n/a
1935 63 43 0.00 n/a
1934 72 45 0.00 n/a
1933 n/a n/a 0.01 n/a
1932 67 31 0.00 n/a
1931 91 47 0.00 n/a
1930 78 44 0.00 n/a
1929 66 32 0.01 n/a
1928 70 39 0.00 n/a
1927 80 46 0.00 n/a
1926 72 41 0.00 n/a
1925 62 36 0.04 n/a
1924 62 43 0.00 n/a
1923 61 33 0.00 n/a
1922 72 38 0.00 n/a
1921 86 47 0.00 n/a
1920 69 31 0.00 n/a
1919 73 37 0.00 n/a
1918 84 48 0.00 n/a
1917 76 50 0.00 n/a
1916 n/a n/a n/a n/a
1915 n/a n/a n/a n/a
1914 60 51 0.00 n/a
1913 74 45 0.00 n/a
1912 59 35 0.00 n/a
1911 62 40 0.00 0.0
1910 91 50 0.00 0.0
1909 74 41 0.00 n/a
1908 62 52 0.00 n/a
1907 77 48 0.00 n/a
1906 63 51 0.00 n/a
1905 60 46 n/a n/a
1904 64 47 n/a n/a
1903 69 44 n/a n/a
1902 63 35 0.00 n/a
1901 n/a n/a n/a n/a
What's the all-time high for Napa on 4/21?
For the date of Apr 21, the highest temperature ever reached in Napa history is 91 °F which has happened 3 times, most recently in 2009.
Highest Temperatures in Napa on April 21
Rank Temperature Year
1 91 °F 2009
1 91 °F 1910
1 91 °F 1931
4 88 °F 1987
5 86 °F 1921
5 86 °F 2012
5 86 °F 1982
8 85 °F 1998
9 84 °F 1918
9 84 °F 1977
What's the all-time low for Napa on 4/21?
For the date of Apr 21, the lowest temperature ever reached in Napa history is 30 °F which has happened 2 times, most recently in 2008.
Lowest Temperatures in Napa on April 21
Rank Temperature Year
1 30 °F 1963
1 30 °F 2008
3 31 °F 1932
3 31 °F 1920
5 32 °F 1929
5 32 °F 1971
7 33 °F 1923
7 33 °F 1944
9 34 °F 2001
10 35 °F 1912
10 35 °F 1977
10 35 °F 1902
10 35 °F 1970
10 35 °F 2007
Lowest High Temperatures in Napa on April 21
Rank Temperature Year
1 52 °F 1967
2 56 °F 2015
3 58 °F 2010
3 58 °F 2007
3 58 °F 1961
6 59 °F 1912
6 59 °F 2003
8 60 °F 1905
8 60 °F 2008
8 60 °F 1914
What's the most it has ever rained in Napa on 4/21?
For the date of Apr 21, the most precipitation ever recorded in Napa history is 0.58 inches which happened in 1955.
All-Time Most Precipitation in Napa on April 21
Rank Precipitation Year
1 0.58 inches 1955
2 0.47 inches 1967
3 0.31 inches 2007
4 0.18 inches 1961
5 0.13 inches 1965
6 0.09 inches 2022
7 0.08 inches 2010
8 0.07 inches 1991
9 0.05 inches 1989
9 0.05 inches 1985
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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