Number of Days of 100 °F in Riverside by Year

This page contains a list of the number of days in each year that the high temperature equaled or exceeded 100 degrees Fahrenheit in Riverside, California, between 1893 and 2024.

Also see:

Which year had the most 100° days?

Based on NOAA records, the year 1996 holds the record for the most 100 °F days in Riverside history. There were 45 days with a high temperature of at least 100 degrees that year.

How many so far this year (2024)?

It has not reached 100 degrees Fahrenheit in Riverside so far in 2024. As of April 29, the highest temperature this year is 89 °F.

The last time it reached at least 100° F was October 18, 2023.

Years marked with a gold background have more than 5% incomplete data
Click column headers to sort

Year	Rank	Days >= 100 °F
2024	127	0
2023	36	26
2022	16	30
2021	69	18
2020	6	36
2019	12	32
2018	49	22
2017	22	28
2016	26	27
2015	49	22
2014	77	17
2013	69	18
2012	17	29
2011	69	18
2010	54	21
2009	26	27
2008	107	12
2007	126	1
2006	14	31
2005	107	12
2004	99	14
2003	43	24
2002	89	15
2001	107	12
2000	59	20
1999	99	14
1998	11	33
1997	26	27
1996	1	45
1995	3	37
1994	26	27
1993	83	16
1992	49	22
1991	77	17
1990	8	35
1989	49	22
1988	46	23
1987	59	20
1986	69	18
1985	17	29
1984	12	32
1983	36	26
1982	43	24
1981	54	21
1980	17	29
1979	14	31
1978	46	23
1977	89	15
1976	69	18
1975	89	15
1974	89	15
1973	69	18
1972	69	18
1971	22	28
1970	83	16
1969	59	20
1968	99	14
1967	59	20
1966	115	11
1965	121	9
1964	107	12
1963	105	13
1962	99	14
1961	83	16
1960	46	23
1959	118	10
1958	59	20
1957	26	27
1956	99	14
1955	40	25
1954	67	19
1953	83	16
1952	99	14
1951	105	13
1950	89	15
1949	83	16
1948	107	12
1947	3	37
1946	54	21
1945	69	18
1944	77	17
1943	26	27
1942	49	22
1941	118	10
1940	22	28
1939	59	20
1938	77	17
1937	26	27
1936	26	27
1935	43	24
1934	89	15
1933	83	16
1932	77	17
1931	89	15
1930	67	19
1929	54	21
1928	89	15
1927	17	29
1926	36	26
1925	40	25
1924	3	37
1923	59	20
1922	2	41
1921	22	28
1920	6	36
1919	26	27
1918	40	25
1917	8	35
1916	59	20
1915	17	29
1914	89	15
1913	10	34
1912	107	12
1911	36	26
1910	26	27
1909	107	12
1908	77	17
1907	107	12
1906	118	10
1905	115	11
1904	115	11
1903	123	6
1902	122	8
1901	125	4
1900	127	0
1899	127	0
1898	127	0
1897	127	0
1896	127	0
1895	89	15
1894	54	21
1893	123	6

Weather Station Details

Years	Station	Coordinates
1999–2024	Riverside Municipal Airport	location
1893–1998	Riverside Fire Station	location