Napa May 15 Weather Records

Daily averages and all-time records for weather in Napa, California for the date of May 15.
May 15 All-Time Records
1901–2024
Highest temperature 101 °F 2008
Lowest temperature 34 °F 1999
Lowest daily high 55 °F 1911
Highest daily low 65 °F 2008
Most precipitation 1.04 inches 1996
May 15 Average Weather
1991–2020 1
Average high 73.1 °F
Average low 47.3 °F
Chance precipitation 12.5%
Napa May 15 Weather by Year
Year High (°F) Low (°F) Precip. (inches) Snow (inches)
2023 72 53 0.00 n/a
2022 80 53 0.00 n/a
2021 63 51 0.00 n/a
2020 76 46 0.00 n/a
2019 63 52 0.92 n/a
2018 68 53 0.00 n/a
2017 73 40 0.00 n/a
2016 76 49 0.00 n/a
2015 68 48 0.00 n/a
2014 89 45 0.00 n/a
2013 75 49 0.00 n/a
2012 69 47 0.00 n/a
2011 60 45 0.06 n/a
2010 65 47 0.00 n/a
2009 78 51 0.00 n/a
2008 101 65 0.00 n/a
2007 68 47 0.00 n/a
2006 76 53 0.00 n/a
2005 72 58 0.00 n/a
2004 76 43 0.00 n/a
2003 68 46 0.00 n/a
2002 73 45 0.00 n/a
2001 76 53 0.00 n/a
2000 64 52 0.31 n/a
1999 69 34 0.00 n/a
1998 68 44 0.00 0.0
1997 85 55 0.00 0.0
1996 80 57 1.04 0.0
1995 68 44 0.05 0.0
1994 66 53 0.01 0.0
1993 79 48 0.00 0.0
1992 71 51 0.00 0.0
1991 77 46 0.00 0.0
1990 74 47 0.00 0.0
1989 77 49 0.03 0.0
1988 82 47 0.00 0.0
1987 74 61 0.00 0.0
1986 79 48 0.00 0.0
1985 91 51 0.00 0.0
1984 70 47 0.00 0.0
1983 76 49 0.00 0.0
1982 79 44 0.00 0.0
1981 72 50 0.00 0.0
1980 73 42 0.00 0.0
1979 n/a n/a n/a n/a
1978 69 51 0.00 0.0
1977 73 41 0.00 0.0
1976 92 51 0.00 0.0
1975 70 46 0.00 0.0
1974 68 43 0.00 0.0
1973 72 50 0.00 0.0
1972 82 51 0.00 0.0
1971 75 46 0.00 0.0
1970 97 58 0.00 0.0
1969 77 44 0.00 0.0
1968 77 40 0.00 0.0
1967 88 49 0.00 0.0
1966 73 44 0.00 0.0
1965 75 44 0.00 0.0
1964 75 38 0.00 0.0
1963 79 41 0.00 0.0
1962 69 46 0.00 0.0
1961 78 51 0.00 0.0
1960 75 44 0.00 0.0
1959 75 43 0.00 0.0
1958 93 46 0.00 0.0
1957 76 47 1.00 0.0
1956 91 45 0.00 0.0
1955 68 38 0.00 0.0
1954 69 49 0.00 0.0
1953 74 44 0.00 0.0
1952 86 45 0.00 0.0
1951 88 46 0.00 0.0
1950 66 46 0.00 0.0
1949 64 43 0.02 0.0
1948 81 43 0.00 n/a
1947 74 48 0.00 n/a
1946 64 47 0.00 n/a
1945 74 47 0.11 n/a
1944 68 40 0.11 n/a
1943 68 36 0.00 n/a
1942 65 48 0.31 n/a
1941 78 48 0.00 n/a
1940 78 49 0.00 n/a
1939 69 53 0.00 n/a
1938 66 53 0.00 n/a
1937 80 46 0.00 n/a
1936 78 43 0.00 n/a
1935 64 42 0.00 n/a
1934 71 52 0.00 n/a
1933 n/a n/a 0.00 n/a
1932 76 45 0.00 n/a
1931 74 49 0.00 n/a
1930 69 43 0.00 n/a
1929 71 49 0.00 n/a
1928 67 53 0.00 n/a
1927 94 50 0.00 n/a
1926 76 48 0.00 n/a
1925 59 49 0.00 n/a
1924 90 50 0.00 n/a
1923 72 50 0.00 n/a
1922 94 65 0.00 n/a
1921 79 42 0.00 n/a
1920 78 45 0.00 n/a
1919 70 41 0.02 n/a
1918 71 39 0.00 n/a
1917 65 34 0.00 n/a
1916 n/a n/a 0.00 n/a
1915 n/a n/a n/a n/a
1914 62 55 0.00 n/a
1913 74 47 0.00 n/a
1912 73 51 0.00 n/a
1911 55 49 0.00 0.0
1910 92 50 0.00 0.0
1909 67 45 0.00 n/a
1908 67 42 0.12 n/a
1907 81 49 0.00 n/a
1906 64 40 n/a n/a
1905 93 56 n/a n/a
1904 90 52 0.00 n/a
1903 83 45 0.00 n/a
1902 72 44 0.00 n/a
1901 74 57 0.00 n/a
What's the all-time high for Napa on 5/15?
For the date of May 15, the highest temperature ever reached in Napa history is 101 °F which happened in 2008.
Highest Temperatures in Napa on May 15
Rank Temperature Year
1 101 °F 2008
2 97 °F 1970
3 94 °F 1922
3 94 °F 1927
5 93 °F 1958
5 93 °F 1905
7 92 °F 1976
7 92 °F 1910
9 91 °F 1956
9 91 °F 1985
What's the all-time low for Napa on 5/15?
For the date of May 15, the lowest temperature ever reached in Napa history is 34 °F which has happened 2 times, most recently in 1999.
Lowest Temperatures in Napa on May 15
Rank Temperature Year
1 34 °F 1917
1 34 °F 1999
3 36 °F 1943
4 38 °F 1955
4 38 °F 1964
6 39 °F 1918
7 40 °F 2017
7 40 °F 1944
7 40 °F 1906
7 40 °F 1968
Lowest High Temperatures in Napa on May 15
Rank Temperature Year
1 55 °F 1911
2 59 °F 1925
3 60 °F 2011
4 62 °F 1914
5 63 °F 2019
5 63 °F 2021
7 64 °F 1935
7 64 °F 1946
7 64 °F 1949
7 64 °F 1906
7 64 °F 2000
What's the most it has ever rained in Napa on 5/15?
For the date of May 15, the most precipitation ever recorded in Napa history is 1.04 inches which happened in 1996.
All-Time Most Precipitation in Napa on May 15
Rank Precipitation Year
1 1.04 inches 1996
2 1.00 inches 1957
3 0.92 inches 2019
4 0.31 inches 2000
4 0.31 inches 1942
6 0.12 inches 1908
7 0.11 inches 1944
7 0.11 inches 1945
9 0.06 inches 2011
10 0.05 inches 1995
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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