Riverside CA Most Rain in a Day for Each Year

This page lists the heaviest rainfalls and wettest days of each year in Riverside, California. The information answers questions like: When was the last time Riverside got more than two inches of rain in a single day? What was the heaviest rainfall of 2021?

This page gives the highest daily precipitation for each year in Riverside and the date that it happened. A date with a plus sign beside it means the same amount of rain also fell on at least one other day earlier that year.

These extremes go back to 1927, with some years missing data. Since then the biggest one-day rainstorm recorded there dropped 4.42 inches (112.3 millimetres) of water on March 4, 1938.

Since 1999 precipitation was measured at the Riverside Municipal Airport. Before then, the weather station was near downtown Riverside.

Most rain in one day for recent years in Riverside
Inches	Date	Millimetres
1.83	August 20, 2023	46.5
0.98	November 08, 2022	24.9
1.16	December 14, 2021	29.5
1.53	March 12, 2020	38.9
2.68	February 14, 2019	68.1
1.59	January 22, 2017	40.4
0.95	January 06, 2016	24.1
1.83	September 15, 2015	46.5
1.07	December 12, 2014	27.2
0.57	February 08, 2013	14.5
0.52	March 17, 2012	13.2
0.75	March 20, 2011	19.1
2.49	December 22, 2010	63.2

Highest daily rainfall recorded at Riverside each year
Inches	Date	Millimetres
0.95	December 07, 2009	24.1
1.45	December 15, 2008	36.8
0.46	April 20, 2007	11.7
0.82	April 04, 2006	20.8
2.39	January 09, 2005	60.7
1.48	October 27, 2004	37.6
1.99	March 15, 2003	50.5
1.09	December 16, 2002	27.7
1.31	February 12, 2001	33.3
0.85	February 21, 2000	21.6
0.58	January 26, 1999	14.7
2.20	February 24, 1998	55.9
2.16	December 06, 1997	54.9
1.31	February 21, 1996	33.3
1.72	January 05, 1995	43.7
1.05	March 19, 1994	26.7
2.22	January 07, 1993	56.4
–	1992	–
2.45	February 28, 1991	62.2
1.25	February 17, 1990	31.8
–	1989	–
0.95	April 15, 1988	24.1
–	1987	–
1.26	March 16, 1986	32.0
0.85	November 29, 1985	21.6
1.10	December 27, 1984	27.9
1.84	August 17, 1983	46.7
1.42	March 17, 1982	36.1
1.03	November 28, 1981	26.2
1.47	January 29, 1980	37.3
1.35	January 06, 1979	34.3
1.81	March 01, 1978	46.0
2.05	August 17, 1977	52.1
1.36	September 10, 1976	34.5
0.90	March 08, 1975	22.9
1.32	December 04, 1974	33.5
1.80	February 11, 1973	45.7
0.89	November 16, 1972	22.6
0.94	December 24, 1971	23.9
1.20	November 29, 1970	30.5
2.41	February 24, 1969	61.2
1.93	March 08, 1968	49.0
0.80	January 22, 1967	20.3
2.08	December 03, 1966	52.8
1.46	November 22, 1965	37.1
0.98	November 17, 1964	24.9
1.64	February 10, 1963	41.7
1.16	February 08, 1962	29.5
1.26	December 02, 1961	32.0
0.87	April 27, 1960	22.1
0.76	February 11, 1959	19.3
1.31	February 04, 1958	33.3
1.05	December 15, 1957	26.7
2.70	January 26, 1956	68.6
0.81	January 18, 1955	20.6
2.11	November 11, 1954	53.6
0.64	April 28, 1953	16.3
1.68	January 16, 1952	42.7
2.17	December 30, 1951	55.1
1.25	February 06, 1950	31.8
1.06	November 10, 1949	26.9
1.31	December 27, 1948	33.3
1.17	December 05, 1947	29.7
1.29	November 08, 1946	32.8
2.36	December 22, 1945	59.9
1.40	February 23, 1944	35.6
–	1943	–
0.57	December 25, 1942	14.5
1.23	December 10, 1941	31.2
1.52	January 08, 1940	38.6
1.04	January 21, 1939	26.4
4.42	March 04, 1938	112.3
3.22	February 07, 1937	81.8
2.00	December 28, 1936	50.8
2.01	August 25, 1935	51.1
–	1934	–
1.40	January 20, 1933	35.6
1.46	February 09, 1932	37.1
1.28	February 05, 1931	32.5
–	1930	–
–	1929	–
2.00	February 04, 1928	50.8
2.31	February 16, 1927	58.7

Riverside - Extreme Daily Rainfall for Each Year

Reference

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