Riverside September Precipitation Totals

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

Rainiest September in Riverside History

The rainiest September in Riverside, California history happened in 1963, with 3.91 inches of total precipitation.

Driest September in Riverside History

There have been 61 times where no rain was recorded in Riverside, California for the entire month of September. The most recent time this happened was 2021.

Riverside Average September Precipitation by Year

Read important notes
Click column headers to sort

Year	Precipitation (inches)
2023	0.31
2022	0.14
2021	0.00
2020	0.00
2019	0.01
2018	0.00
2017	0.22
2016	0.00
2015	1.87
2014	0.23
2013	0.00
2012	0.00
2011	0.04
2010	0.01
2009	0.00
2008	0.00
2006	0.00
2005	0.06
2004	0.00
2003	0.00
2002	0.01
2001	0.00
2000	0.04
1999	0.00
1998	0.00
1997	0.66
1996	0.00
1995	0.00
1994	0.00
1993	0.00
1991	0.00
1990	0.00
1989	0.39
1988	0.05
1987	0.19
1986	0.30
1985	0.29
1984	0.16
1983	0.64
1982	0.74
1981	0.41
1980	0.00
1979	0.00
1978	1.15
1977	0.00
1976	2.03
1975	0.05
1974	0.00
1973	0.00
1972	0.01
1971	0.00
1970	0.00
1969	0.00
1968	0.00
1967	0.06
1966	0.04
1965	0.74
1964	0.21
1963	3.91
1962	0.00
1961	0.00
1960	0.00
1959	0.02
1958	0.26
1957	0.00
1956	0.00
1955	0.00
1954	0.00
1953	0.00
1952	0.51
1951	0.18
1950	0.03
1949	0.00
1948	0.00
1947	0.03
1946	0.15
1945	0.07
1944	0.00
1943	0.00
1942	0.00
1941	0.00
1940	0.00
1939	1.19
1938	0.00
1937	0.02
1936	0.00
1935	0.00
1934	0.05
1933	0.01
1932	0.04
1931	0.22
1930	0.00
1929	0.63
1928	0.00
1927	0.00
1926	0.00
1925	0.00
1924	0.00
1923	0.03
1922	0.00
1920	0.06
1918	0.30
1916	0.99
1915	0.00
1914	0.02
1912	0.01
1911	0.75
1910	0.00
1909	0.00
1908	0.77
1907	0.00
1906	0.02
1905	0.08
1904	0.00
1903	0.43
1902	0.00
1901	0.00

Notes

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