Riverside May Precipitation Totals

A time series of total precipitation in the month of May in Riverside, California from 1893–2023.

Rainiest May in Riverside History

The rainiest May in Riverside, California history happened in 1930, with 3.13 inches of total precipitation.

Driest May in Riverside History

There have been 36 times where no rain was recorded in Riverside, California for the entire month of May. The most recent time this happened was 2022.

Riverside Average May Precipitation by Year

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Year	Precipitation (inches)
2023	0.47
2022	0.00
2021	0.00
2020	0.00
2019	0.44
2018	0.15
2017	0.02
2016	0.18
2015	0.60
2014	0.00
2013	0.10
2012	0.03
2011	0.30
2010	0.13
2009	0.00
2007	0.00
2006	0.31
2005	0.24
2004	0.00
2003	0.19
2002	0.00
2001	0.01
2000	0.00
1999	0.02
1998	1.53
1997	0.00
1996	0.00
1995	0.30
1994	0.41
1993	0.00
1992	0.04
1991	0.16
1990	0.39
1989	0.04
1988	0.00
1987	0.07
1986	0.00
1985	0.00
1984	0.02
1983	0.17
1982	0.34
1981	0.02
1980	0.00
1979	0.11
1978	0.00
1977	1.63
1976	0.00
1975	0.04
1974	0.00
1973	0.00
1972	0.06
1971	0.27
1970	0.00
1969	0.60
1968	0.00
1967	0.03
1966	0.14
1965	0.00
1964	0.05
1963	0.00
1962	0.44
1961	0.02
1960	0.08
1959	0.01
1958	0.24
1957	1.06
1956	0.22
1955	1.11
1954	0.00
1953	0.06
1952	0.01
1951	0.29
1950	0.08
1949	0.57
1948	0.17
1947	0.05
1946	0.04
1945	0.00
1944	0.00
1943	0.00
1942	0.00
1941	0.94
1940	0.00
1939	0.00
1938	0.21
1937	0.26
1936	0.15
1935	0.18
1934	0.00
1933	0.34
1932	0.10
1931	0.53
1930	3.13
1929	0.00
1928	0.94
1927	0.08
1926	0.08
1923	0.00
1918	0.19
1917	0.18
1916	0.12
1915	1.32
1914	0.04
1913	0.30
1912	0.38
1911	0.03
1910	0.00
1909	0.09
1908	0.21
1907	0.07
1906	0.52
1905	0.88
1904	0.08
1903	0.03
1902	0.16
1895	0.26
1893	0.00

Notes

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