Napa May 1 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of May 1.
May 1 All-Time Records
1901–2024
Highest temperature 93 °F 1947
Lowest temperature 34 °F 2011
Lowest daily high 59 °F 2023
Highest daily low 58 °F 1995
Most precipitation 0.83 inches 1995
May 1 Average Weather
1991–2020 1
Average high 71.8 °F
Average low 45.2 °F
Chance precipitation 16.2%
Napa May 1 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 59 50 0.20 n/a
2022 75 38 0.00 n/a
2021 76 47 0.00 n/a
2020 78 41 0.00 n/a
2019 71 39 0.00 n/a
2018 70 40 0.00 n/a
2017 91 47 0.00 n/a
2016 84 45 0.00 n/a
2015 74 45 0.00 n/a
2014 85 46 0.00 n/a
2013 89 52 0.00 n/a
2012 69 40 0.00 n/a
2011 78 34 0.00 n/a
2010 73 38 0.00 n/a
2009 61 42 0.61 n/a
2008 76 34 0.00 n/a
2007 70 37 0.01 n/a
2006 77 46 0.00 n/a
2005 70 40 0.00 n/a
2004 80 43 0.00 n/a
2003 68 41 0.00 n/a
2002 65 45 0.00 n/a
2001 79 44 0.00 n/a
2000 72 38 0.00 n/a
1999 67 46 0.00 n/a
1998 70 57 0.12 0.0
1997 73 41 0.00 0.0
1996 92 53 0.00 0.0
1995 69 58 0.83 0.0
1994 69 44 0.00 0.0
1993 84 56 0.00 0.0
1992 79 47 0.00 0.0
1991 65 44 0.05 0.0
1990 80 50 0.00 0.0
1989 76 45 0.02 0.0
1988 69 40 0.00 0.0
1987 66 51 0.00 0.0
1986 68 48 0.00 0.0
1985 80 47 0.00 0.0
1984 63 55 0.00 0.0
1983 65 45 0.02 0.0
1982 78 42 0.00 0.0
1981 78 50 0.00 0.0
1980 73 50 0.00 0.0
1979 n/a n/a n/a n/a
1978 81 49 0.02 0.0
1977 65 52 0.60 0.0
1976 82 45 0.00 0.0
1975 67 50 0.00 0.0
1974 68 48 0.00 0.0
1973 73 48 0.00 0.0
1972 87 45 0.00 0.0
1971 69 46 0.00 0.0
1970 88 46 0.00 0.0
1969 68 39 0.00 0.0
1968 72 41 0.00 0.0
1967 67 38 0.00 0.0
1966 85 43 0.00 0.0
1965 70 40 0.00 0.0
1964 60 44 0.05 0.0
1963 71 41 0.00 0.0
1962 76 43 0.00 0.0
1961 70 45 0.09 0.0
1960 75 42 0.00 0.0
1959 67 44 0.00 0.0
1958 73 42 0.00 0.0
1957 65 50 0.02 0.0
1956 67 47 0.00 0.0
1955 63 41 0.04 0.0
1954 69 42 0.00 0.0
1953 67 37 0.00 0.0
1952 69 43 0.25 0.0
1951 66 46 0.00 0.0
1950 60 48 0.07 0.0
1949 69 47 0.00 0.0
1948 66 36 0.15 n/a
1947 93 45 0.00 n/a
1946 80 40 0.00 n/a
1945 75 50 0.00 n/a
1944 86 45 0.00 n/a
1943 82 46 0.00 n/a
1942 67 36 0.02 n/a
1941 70 48 0.00 n/a
1940 75 45 0.00 n/a
1939 70 47 0.00 n/a
1938 66 50 0.00 n/a
1937 81 40 0.00 n/a
1936 67 42 0.00 n/a
1935 59 40 0.00 n/a
1934 68 43 0.10 n/a
1933 n/a n/a 0.00 n/a
1932 62 54 0.08 n/a
1931 77 54 0.00 n/a
1930 75 44 0.00 n/a
1929 85 39 0.00 n/a
1928 71 41 0.00 n/a
1927 66 43 0.02 n/a
1926 64 48 0.00 n/a
1925 76 42 0.00 n/a
1924 74 43 0.00 n/a
1923 62 39 0.00 n/a
1922 79 40 0.00 n/a
1921 69 40 0.13 n/a
1920 65 38 0.00 n/a
1919 74 49 0.00 n/a
1918 84 42 0.00 n/a
1917 67 35 0.00 n/a
1916 n/a n/a 0.00 n/a
1915 n/a n/a n/a n/a
1914 70 50 0.00 n/a
1913 69 49 0.00 n/a
1912 60 44 0.16 n/a
1911 60 40 0.00 0.0
1910 68 41 0.00 0.0
1909 84 48 0.00 n/a
1908 60 44 0.35 n/a
1907 65 47 0.00 n/a
1906 66 55 n/a n/a
1905 59 46 n/a n/a
1904 65 44 0.00 n/a
1903 80 50 0.00 n/a
1902 62 42 0.00 n/a
1901 67 46 0.07 n/a
What's the all-time high for Napa on 5/1?
For the date of May 1, the highest temperature ever reached in Napa history is 93 °F which happened in 1947.
Highest Temperatures in Napa on May 1
Rank Temperature Year
1 93 °F 1947
2 92 °F 1996
3 91 °F 2017
4 89 °F 2013
5 88 °F 1970
6 87 °F 1972
7 86 °F 1944
8 85 °F 1966
8 85 °F 1929
8 85 °F 2014
What's the all-time low for Napa on 5/1?
For the date of May 1, the lowest temperature ever reached in Napa history is 34 °F which has happened 2 times, most recently in 2011.
Lowest Temperatures in Napa on May 1
Rank Temperature Year
1 34 °F 2011
1 34 °F 2008
3 35 °F 1917
4 36 °F 1948
4 36 °F 1942
6 37 °F 2007
6 37 °F 1953
8 38 °F 1920
8 38 °F 2000
8 38 °F 2010
8 38 °F 2022
8 38 °F 1967
Lowest High Temperatures in Napa on May 1
Rank Temperature Year
1 59 °F 1905
1 59 °F 2023
1 59 °F 1935
4 60 °F 1964
4 60 °F 1912
4 60 °F 1911
4 60 °F 1950
4 60 °F 1908
9 61 °F 2009
10 62 °F 1923
10 62 °F 1902
10 62 °F 1932
What's the most it has ever rained in Napa on 5/1?
For the date of May 1, the most precipitation ever recorded in Napa history is 0.83 inches which happened in 1995.
All-Time Most Precipitation in Napa on May 1
Rank Precipitation Year
1 0.83 inches 1995
2 0.61 inches 2009
3 0.60 inches 1977
4 0.35 inches 1908
5 0.25 inches 1952
6 0.20 inches 2023
7 0.16 inches 1912
8 0.15 inches 1948
9 0.13 inches 1921
10 0.12 inches 1998
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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