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Napa May Precipitation Totals

A time series of total precipitation in the month of May in Napa, California from 1901–2023.

Rainiest May in Napa History

The rainiest May in Napa, California history happened in 1996, with 3.72 inches of total precipitation.

Driest May in Napa History

There have been 21 times where no rain was recorded in Napa, California for the entire month of May. The most recent time this happened was 2022.

Napa Average May Precipitation by Year

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Year	Precipitation (inches)
2023	0.70
2022	0.00
2021	0.03
2020	0.87
2019	2.78
2018	0.01
2017	0.00
2016	0.25
2015	0.00
2014	0.00
2013	0.08
2012	0.03
2011	0.97
2010	1.08
2009	1.04
2008	0.03
2007	0.34
2006	0.41
2005	1.73
2004	0.04
2003	1.13
2002	0.84
2001	0.00
2000	1.15
1999	0.07
1998	2.99
1997	0.79
1996	3.72
1995	3.10
1994	1.57
1993	1.39
1992	0.00
1991	0.15
1990	3.27
1989	0.08
1988	1.04
1987	0.00
1986	0.19
1985	0.03
1984	0.14
1983	0.49
1982	0.00
1981	0.44
1980	0.55
1978	0.02
1977	1.21
1976	0.00
1975	0.03
1974	0.02
1973	0.02
1972	0.12
1971	0.21
1970	0.00
1969	0.00
1968	0.36
1967	0.12
1966	0.19
1965	0.00
1964	0.15
1963	0.44
1962	0.00
1961	0.21
1960	1.70
1959	0.00
1958	1.14
1957	3.60
1956	0.76
1955	0.20
1954	0.41
1953	0.63
1952	0.37
1951	1.52
1950	0.28
1949	0.20
1948	1.35
1947	0.43
1946	0.62
1945	0.95
1944	1.25
1943	0.00
1942	1.36
1941	1.45
1940	1.32
1939	1.22
1938	0.00
1937	0.03
1936	0.26
1935	0.02
1934	0.78
1933	0.08
1932	0.95
1931	1.46
1930	0.54
1929	0.08
1928	0.32
1927	0.56
1926	0.50
1925	2.83
1924	0.10
1923	0.00
1922	0.38
1921	1.19
1920	0.00
1919	0.02
1918	0.06
1917	0.51
1916	0.23
1914	0.48
1913	0.55
1912	2.12
1911	0.21
1910	0.00
1909	0.00
1908	0.75
1907	0.26
1904	0.04
1903	0.00
1902	1.23
1901	1.11

Its possible for precipitation totals to include both rain and melted snowfall
Months with more than 10% missing data are excluded