Napa April 18 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of April 18.
April 18 All-Time Records
1901–2024
Highest temperature 90 °F 1950
Lowest temperature 32 °F 1917
Lowest daily high 54 °F 1925
Highest daily low 55 °F 1907
Most precipitation 0.82 inches 1957
April 18 Average Weather
1991–2020 1
Average high 69.2 °F
Average low 43.4 °F
Chance precipitation 21.3%
Napa April 18 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2024 73 n/a 0.00 n/a
2023 61 39 0.00 n/a
2022 66 35 0.16 n/a
2021 86 37 0.00 n/a
2020 65 45 0.00 n/a
2019 80 45 0.00 n/a
2018 60 38 0.00 n/a
2017 69 50 0.06 n/a
2016 83 43 0.00 n/a
2015 69 45 0.00 n/a
2014 68 43 0.00 n/a
2013 76 41 0.00 n/a
2012 70 48 0.00 n/a
2011 60 52 0.00 n/a
2010 74 41 0.00 n/a
2009 78 44 0.00 n/a
2008 63 46 0.00 n/a
2007 64 37 0.00 n/a
2006 67 37 0.00 n/a
2005 68 33 0.00 n/a
2004 56 35 0.07 n/a
2003 65 37 0.00 n/a
2002 62 33 0.00 n/a
2001 68 41 0.02 n/a
2000 67 41 0.00 n/a
1999 72 44 0.00 n/a
1998 71 39 0.00 0.0
1997 78 53 0.02 0.0
1996 63 38 0.36 0.0
1995 66 42 0.07 0.0
1994 77 48 0.00 0.0
1993 66 46 0.00 0.0
1992 80 46 0.00 0.0
1991 64 42 0.00 0.0
1990 67 51 0.00 0.0
1989 76 53 0.00 0.0
1988 66 48 0.00 0.0
1987 68 46 0.00 0.0
1986 77 44 0.00 0.0
1985 66 43 0.00 0.0
1984 60 48 0.25 0.0
1983 70 53 0.16 0.0
1982 81 43 0.00 0.0
1981 62 50 0.05 0.0
1980 75 42 0.00 0.0
1979 65 35 0.00 0.0
1978 69 39 0.00 0.0
1977 83 40 0.00 0.0
1976 72 45 0.00 0.0
1975 61 36 0.00 0.0
1974 60 43 0.00 0.0
1973 67 38 0.00 0.0
1972 65 40 0.00 0.0
1971 71 35 0.00 0.0
1970 67 37 0.00 0.0
1969 69 40 0.00 0.0
1968 75 42 0.00 0.0
1967 55 34 0.32 0.0
1966 68 45 0.00 0.0
1965 61 49 0.50 0.0
1964 63 45 0.00 0.0
1963 61 34 0.00 0.0
1962 77 42 0.00 0.0
1961 61 38 0.00 0.0
1960 69 45 0.00 0.0
1959 71 41 0.00 0.0
1958 72 48 0.00 0.0
1957 64 51 0.82 0.0
1956 83 44 0.00 0.0
1955 56 39 0.30 0.0
1954 82 52 0.00 0.0
1953 76 41 0.00 0.0
1952 83 46 0.00 0.0
1951 67 37 0.00 0.0
1950 90 46 0.00 0.0
1949 65 48 0.00 0.0
1948 77 40 0.00 n/a
1947 79 44 0.00 n/a
1946 66 40 0.00 n/a
1945 82 45 0.00 n/a
1944 66 35 0.00 n/a
1943 73 45 0.00 n/a
1942 70 40 0.00 n/a
1941 70 38 0.00 n/a
1940 80 48 0.00 n/a
1939 78 45 0.00 n/a
1938 85 51 0.00 n/a
1937 66 39 0.00 n/a
1936 65 41 0.00 n/a
1935 73 41 0.00 n/a
1934 74 45 0.00 n/a
1933 n/a n/a 0.04 n/a
1932 72 42 0.00 n/a
1931 74 42 0.00 n/a
1930 69 51 0.00 n/a
1929 71 37 0.04 n/a
1928 62 35 0.00 n/a
1927 66 37 0.00 n/a
1926 64 45 0.03 n/a
1925 54 44 0.02 n/a
1924 76 39 0.00 n/a
1923 68 41 0.08 n/a
1922 61 34 0.00 n/a
1921 69 40 0.00 n/a
1920 76 44 0.00 n/a
1919 66 51 0.00 n/a
1918 84 51 0.00 n/a
1917 65 32 0.00 n/a
1916 n/a n/a n/a n/a
1915 n/a n/a n/a n/a
1914 84 52 0.00 n/a
1913 62 50 0.00 n/a
1912 62 43 0.00 n/a
1911 68 44 0.00 0.0
1910 70 45 0.00 0.0
1909 64 39 0.00 n/a
1908 78 43 0.00 n/a
1907 84 55 0.00 n/a
1906 73 45 0.00 n/a
1905 54 50 0.19 n/a
1904 65 42 n/a n/a
1903 61 37 n/a n/a
1902 68 47 0.00 n/a
1901 n/a n/a n/a n/a
What's the all-time high for Napa on 4/18?
For the date of Apr 18, the highest temperature ever reached in Napa history is 90 °F which happened in 1950.
Highest Temperatures in Napa on April 18
Rank Temperature Year
1 90 °F 1950
2 86 °F 2021
3 85 °F 1938
4 84 °F 1914
4 84 °F 1907
4 84 °F 1918
7 83 °F 1956
7 83 °F 1977
7 83 °F 1952
7 83 °F 2016
What's the all-time low for Napa on 4/18?
For the date of Apr 18, the lowest temperature ever reached in Napa history is 32 °F which happened in 1917.
Lowest Temperatures in Napa on April 18
Rank Temperature Year
1 32 °F 1917
2 33 °F 2002
2 33 °F 2005
4 34 °F 1922
4 34 °F 1967
4 34 °F 1963
7 35 °F 1928
7 35 °F 2022
7 35 °F 1944
7 35 °F 1979
7 35 °F 2004
7 35 °F 1971
Lowest High Temperatures in Napa on April 18
Rank Temperature Year
1 54 °F 1905
1 54 °F 1925
3 55 °F 1967
4 56 °F 2004
4 56 °F 1955
6 60 °F 1974
6 60 °F 2018
6 60 °F 2011
6 60 °F 1984
10 61 °F 1965
10 61 °F 2023
10 61 °F 1961
10 61 °F 1922
10 61 °F 1963
10 61 °F 1903
10 61 °F 1975
What's the most it has ever rained in Napa on 4/18?
For the date of Apr 18, the most precipitation ever recorded in Napa history is 0.82 inches which happened in 1957.
All-Time Most Precipitation in Napa on April 18
Rank Precipitation Year
1 0.82 inches 1957
2 0.50 inches 1965
3 0.36 inches 1996
4 0.32 inches 1967
5 0.30 inches 1955
6 0.25 inches 1984
7 0.19 inches 1905
8 0.16 inches 2022
8 0.16 inches 1983
10 0.08 inches 1923
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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