Riverside, CA: Summer

31 August 2026: Summer 2026 averaged 79.8°F in Riverside, CA, the warmest summer since 2022, tied 4th warmest of 120 (with 2016).

Summer 2026

Mean temperature: 79.8°F; Warmest since 2022; 4th warmest of 120
Precipitation: a trace; Driest since 2024; 17th driest of 107

A normal summer in Riverside, CA (1991 to 2020): 0.04 in of precipitation, between 0.00 in and 0.80 in in eight years of ten.

The mean temperature of every summer in Riverside, CA since 1894: 79.8°F in 2026; the highest is 81.8°F, in 2006.

Every year, ranked, as a table

Every summer in Riverside, CA from 1893 to 2026, ranked: the mean temperature, the mean high and the mean low from the warmest, the precipitation from the wettest; a year missing more than a tenth of its days is not ranked.

Year	Mean, °F	Rank	High, °F	Rank	Low, °F	Rank	Precipitation, in	Rank	Days missing
2026	79.8	4	94.2	19	65.5	2	trace	74	0
2025	77.2	28	92	65	62.4	27	0.03	62	0
2024	79.4	9	94.8	7	63.9	11	trace	74	0
2023	76.9	32	91	83	62.8	24	2.04	3	0
2022	80	2	94.8	7	65.3	4	0.04	57	0
2021	79	11	93.7	27	64.3	9	0.18	29	0
2020	78.2	18	93	40	63.4	16	trace	74	0
2019	77.6	24	92.6	47	62.6	25	0.02	65	0
2018	79.9	3	94.5	13	65.3	4	0.02	65	0
2017	79.7	6	94.6	9	64.7	7	0.29	23	0
2016	79.8	4	94.6	9	65	6	trace	74	0
2015	78.8	13	92.2	61	65.4	3	1.95	5	0
2014	77.9	21	91.9	67	64	10	0.14	32	0
2013	77.6	24	91.4	77	63.9	11	0.16	31	0
2012	78	20	92.5	50	63.6	13	0.01	71	0
2011	76	51	90.3	95	61.7	32	0.35	20	0
2010	75.3	58	89.4	109	61.2	36	trace	74	0
2009	76.6	39	90.6	91	62.6	25	0.04	57	0
2008							0.00	92	22
2007							trace	74	11
2006	81.8	1	97.1	1	66.5	1	0.10	39	8
2005							0.90	8	12
2004			91.2	82	61.9	29	0.00	92	10
2003	78.8	13	93	40	64.5	8	0.00	92	5
2002	77	31	92.2	61	61.6	33	0.00	92	2
2001					62.2	28	0.45	16	12
2000	78.7	15	94.6	9	62.9	22	0.00	92	4
1999	76.2	46	92	65	60.3	46	0.61	13	6
1998	78.2	18	93.4	31	63	21	0.42	18	1
1997	77.3	26	91.6	74	62.9	22	0.05	50	3
1996	79.5	8	95.9	3	63.2	17	trace	74	4
1995	77.9	21	94.2	19	61.6	33	0.80	11	5
1994	79.3	10	95.4	6	63.2	17	0.02	65	2
1993	76.3	44	90.6	91	61.9	29	0.84	10	2
1992	78.6	16	93.6	29	63.6	13	0.22	26	2
1991	74.8	71	89.6	107	60	52	0.03	62	1
1990	78.9	12	94.3	17	63.6	13	0.06	49	1
1989	76.2	46	91.4	77	60.9	38	0.00	92	2
1988	76.7	37	92.1	64	61.3	35	trace	74	0
1987	75.3	58	90.9	86	59.8	54			2
1986	76.5	41	94.4	15	58.7	62	0.09	43	1
1985	77.8	23	95.6	5	60.3	46	trace	74	2
1984	78.4	17	93.9	23	63.1	20	0.05	50	1
1983	76.5	41	91.3	81	61.9	29	2.33	1	4
1982	75.3	58	90.3	95	60.4	45	0.14	32	5
1981	79.7	6	96.3	2	63.2	17	0.00	92	1
1980	77.3	26	93.9	23	60.7	42	0.00	92	0
1979	77.1	30	93.2	37	60.9	38	0.11	37	0
1978	76.9	32	93.7	27	60.1	51	0.01	71	1
1977	76.8	34	92.5	50	61	37	2.14	2	1
1976	75.4	57	91.7	72	59.1	59	0.10	39	2
1975	73.9	83	90.3	95	57.5	70	0.00	92	0
1974	76.2	46	92.3	56	60.2	50	0.00	92	0
1973	75.5	56	91.7	72	59.3	56	trace	74	0
1972	76.7	37	92.5	50	60.9	38	0.75	12	1
1971	76.6	39	92.5	50	60.5	44	0.00	92	1
1970	76.8	34	93.3	33	60.3	46	0.12	35	1
1969	75.3	58	89.8	103	60.8	41	0.03	62	2
1968	75.2	63	90.7	90	59.7	55	0.59	14	2
1967	77.2	28	93.3	33	60.7	42	0.43	17	6
1966	75.8	55	92.3	56	59.3	56	0.04	57	0
1965	73.1	96	88.3	120	57.9	67	0.40	19	0
1964	73.8	85	90.3	95	57.3	72	0.01	71	0
1963	73.5	90	88.9	118	58.2	65	0.20	28	9
1962	73.2	94	90.5	93	55.9	88	0.04	57	0
1961	76.5	41	92.3	56	60	52	0.13	34	9
1960	76.1	50	93.2	37	59	61	trace	74	1
1959	75.9	52	92.6	47	59.2	58	0.02	65	0
1958	73.9	83	90.1	101	57.8	68	0.52	15	1
1957	76.8	34	94.6	9	59.1	59	0.18	29	3
1956	73.2	94	90.4	94	56.1	85	1.26	6	4
1955	74.3	77	91.8	69	57	77	trace	74	3
1954	75	66	91.4	77	58.6	63	0.10	39	2
1953	71.7	112	89.5	108	54	109	0.07	45	5
1952	72.4	107	89.4	109	55.3	95	0.21	27	1
1951	72.2	109	89	116	55.3	95	0.02	65	0
1950	71.3	114	90.1	101	52.4	120	trace	74	0
1949	72.6	102	91	83	54.3	105	0.00	92	0
1948	70.9	118	89.8	103	52.2	121	0.30	22	3
1947			91.8	69			0.05	50	11
1946	74.4	74	93.4	31	55.3	95	0.05	50	0
1945	73.5	90	90.3	95	56.7	80	1.03	7	0
1944	71.2	116	89.1	113	53.3	115	0.02	65	0
1943	72.6	102	90.9	86	54.4	104	0.04	57	0
1942	74.5	73	92.8	45	56.3	82	0.11	37	0
1941	72.8	100	89.4	109	56.1	85	0.35	20	0
1940	74.3	77	92.9	43	55.7	91	0.00	92	0
1939	74.7	72	92.5	50	56.9	79	trace	74	0
1938	74.4	74	91.5	76	57.3	72	trace	74	0
1937	74.9	69	92.5	50	57.3	72	trace	74	0
1936	75.9	52	93.3	33	58.6	63	0.07	45	0
1935	73.8	85	91.9	67	55.8	90	2.04	3	0
1934	72.5	105	89.2	112	55.9	88	0.25	25	0
1933	73	98	91	83	55.1	101	0.12	35	0
1932	72.1	110	90.2	100	54	109	0.07	45	0
1931	76.3	44	92.2	61	60.3	46	0.86	9	0
1930	74.1	80	93	40	55.2	99	trace	74	6
1929									12
1928	72.6	102	89.8	103	55.4	93	0.00	92	0
1927	75	66	94.1	22	56	87	0.05	50	0
1926	75.9	52	93.9	23	58	66			0
1925	75.2	63	94.3	17	56.2	83			0
1924	74.4	74	94.4	15	54.3	105			0
1923	72.5	105	90.9	86	54	109			0
1922	76.2	46	94.5	13	57.5	70			1
1921	75.1	65	93.2	37	57	77			0
1920	74.3	77	93.3	33	55.2	99			0
1919	73.4	92	94.2	19	52.7	117			0
1918	75.3	58	93.5	30	57.3	72			4
1917	74.9	69	95.7	4	54.1	108			0
1916	71.3	114	91.4	77	51.3	122			0
1915	73.7	87	93.8	26	53.5	113			0
1914	73.1	96	90.8	89	55.3	95	0.08	44	0
1913	74	81	91.6	74	56.5	81	0.29	23	0
1912	71.1	117	89.8	103	52.5	118	0.05	50	0
1911	73	98	92.7	46	53.3	115	0.10	39	0
1910	74	81	92.6	47	55.4	93	0.00	92	0
1909	73.3	93	88.9	118	57.7	69			0
1908	73.6	89	92.3	56	54.8	103			0
1907	72.4	107	89.1	113	55.7	91			0
1906	72.7	101	89.1	113	56.2	83			1
1905	70.7	120	88	121	53.4	114	0.00	92	0
1904	75	66	92.9	43	57.1	76	0.07	45	0
1903	71.6	113	89	116	54.2	107	trace	74	0
1902	70.8	119	87.8	122	53.7	112	0.05	50	0
1901									69
1895	73.7	87	92.3	56	55.1	101			0
1894	72.1	110	91.8	69	52.5	118			7
1893									32

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2006	81.8
2022	80
2018	79.9
2026	79.8
2016	79.8
2017	79.7
1981	79.7
1996	79.5
2024	79.4
1994	79.3

Coldest
Year	Mean, °F
1905	70.7
1902	70.8
1948	70.9
1912	71.1
1944	71.2
1950	71.3
1916	71.3
1903	71.6
1953	71.7
1932	72.1
More years share the last value

Wettest
Year	Precipitation, in
1983	2.33
1977	2.14
2023	2.04
1935	2.04
2015	1.95
1956	1.26
1945	1.03
2005	0.90
1931	0.86
1993	0.84

Driest
Year	Precipitation, in
2008	0.00
2004	0.00
2003	0.00
2002	0.00
2000	0.00
1989	0.00
1981	0.00
1980	0.00
1975	0.00
1974	0.00
More years share the last value

The hottest, coldest and wettest days

Hottest day: 107°F; 26 August 2026
Coldest night: 56°F; 20 June 2026

Every month, season and year

Months

Seasons

Years

Riverside, CA the day's answers

All-time records

Every answer in words

Summer 2026 brought a trace of precipitation in Riverside, CA, the driest summer since 2024, tied 17th driest of 107 (with 2024, 2020, 2016 and 14 other years).
The hottest day of summer 2026 in Riverside, CA: 107°F on Wednesday 26 August 2026.
The coldest night of summer 2026 in Riverside, CA: a low of 56°F on Saturday 20 June 2026.