Riverside, CA: December

31 December 2025: December 2025 averaged 60.1°F in Riverside, CA, the warmest December on record, in 116 years since 1893 (1896 excluded: 31 of 31 days missing; 1897 excluded: 31 of 31 days missing; 1898 excluded: 31 of 31 days missing; 14 more years excluded for missing days); provisional.

December 2025

Mean temperature: 60.1°F; Warmest on record; Warmest of 116, provisional
Precipitation: 1.19 in; Wettest since 2022; 49th wettest of 110

A normal December in Riverside, CA (1991 to 2020): 0.66 in of precipitation, between 0.02 in and 3.19 in in eight years of ten.

The mean temperature of every December in Riverside, CA since 1893: 60.1°F in 2025, the highest of them all.

Every year, ranked, as a table

Every December in Riverside, CA from 1893 to 2025, 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
2025	60.1	1	72.9	10	47.4	2	1.19	49	0
2024	58.2	6	71.8	16	44.6	8	trace	102	0
2023	59	4	70.6	29	47.3	3	0.86	60	0
2022	54.1	51	64.6	92	43.5	19	2.02	31	0
2021	52.9	73	63	108	42.8	25	3.75	11	0
2020	57.2	14	70.7	26	43.7	17	1.16	50	0
2019	54.1	51	64	99	44.3	14	2.52	23	0
2018	55.8	32	66.9	67	44.6	8	1.10	53	0
2017	60	2	74.5	5	45.5	7	trace	102	0
2016	56.3	29	65.8	81	46.8	5	3.34	13	0
2015	54.1	51	66.9	67	41.4	38	0.66	67	0
2014	56.6	24	65.6	85	47.5	1	2.95	18	0
2013	57.1	17	69.7	37	44.5	11	0.16	90	0
2012	54.1	51	63.7	102	44.5	11	1.38	46	0
2011	54.3	47	67.1	63	41.4	38	0.49	74	0
2010	56.7	23	67.3	62	46.1	6	6.88	1	0
2009	53.9	58	64.4	96	43.4	22	2.22	27	0
2008									9
2007							0.60	70	6
2006	57.2	14	72.5	14	41.8	32	0.60	70	0
2005							0.00	107	8
2004							1.42	45	5
2003							0.35	80	5
2002									4
2001	52.7	74	65.7	82	39.7	59	1.16	50	2
2000	59	4	73.8	7	44.2	15	trace	102	0
1999	56.8	20	72.7	12	41.1	42	0.04	96	2
1998							0.45	77	4
1997	54.5	42	67.4	60	41.5	37	3.12	16	1
1996	56.8	20	69.8	35	43.8	16			2
1995	57.2	14	70.9	23	43.5	19	0.30	82	1
1994	55.1	36	69.2	43	41	44	0.18	88	1
1993	55.8	32	70.8	24	40.9	45	0.66	67	2
1992	52.4	79	64.6	92	40	55	3.30	14	2
1991	57	18	69.5	39	44.4	13	0.89	59	0
1990	53.2	67	68.3	53	38	83	trace	102	0
1989	57.4	13	74.9	4	39.9	57	0.13	91	0
1988	54.3	47	67.5	57	41.1	42	2.46	24	0
1987	51.5	91	63.5	105	39.5	63	1.38	46	0
1986	53.7	61	70.3	32	37.2	93	0.54	72	0
1985	55.4	34	71.3	19	39.5	63	0.33	81	0
1984	52.1	84	64	99	40.3	51	4.12	10	0
1983	54.4	45	66.5	75	42.3	27	1.51	42	1
1982	52	85	64.7	90	39.2	68	0.52	73	1
1981	56	31	70.1	33	41.9	31	0.27	83	0
1980	57.9	8	73.6	8	42.2	28	0.19	87	1
1979	56.5	25	72.1	15	40.8	46	0.12	92	1
1978	50.1	109	63.7	102	36.4	102	1.56	38	0
1977	58	7	68.8	49	47.2	4	1.55	40	0
1976	54.3	47	71	22	37.5	89	0.23	85	1
1975	54.9	37	69.4	41	40.5	48	0.76	64	0
1974	52.7	74	65.7	82	39.7	59	1.84	32	0
1973	53.8	59	68.1	56	39.6	61	0.06	94	1
1972	50.9	99	64.3	97	37.3	92	1.30	48	1
1971	48.5	114	59.3	117	37.7	86	3.45	12	0
1970	50.8	101	62.4	110	39.3	67	2.44	25	0
1969	53.5	65	66.3	78	40.7	47	0.02	100	0
1968	50.6	105	64.8	88	36.3	103	1.00	56	1
1967	52.2	82	63.9	101	40.5	48	1.10	53	0
1966	54.6	41	67.5	57	41.8	32	4.88	7	0
1965	52.4	79	64.3	97	40.2	52	3.03	17	1
1964	52.4	79	63.4	106	41.4	38	0.11	93	0
1963	54.1	51	70.4	30	37.8	85	0.00	107	0
1962	53.6	63	69	47	38.3	77	0.06	94	0
1961	53.8	59	67.5	57	40	55	1.54	41	0
1960	54	56	69.6	38	38.4	75	0.18	88	0
1959	56.1	30	69.8	35	42.4	26	1.06	55	0
1958	57.7	9	75.3	3	40.1	53	0.00	107	0
1957	57	18	71.8	16	42.1	29	2.06	30	1
1956	54.4	45	71.1	21	37.7	86	0.20	86	0
1955	52.6	77	64.5	94	41.6	36	0.49	74	2
1954	51.7	89	66.6	73	36.8	97	0.72	66	0
1953	51.5	91	68.7	50	34.4	112	0.39	79	0
1952	49.4	111	62.2	111	36.5	101	2.74	21	0
1951	49.3	113	60.6	115	38.1	82	5.49	4	0
1950	54.7	39	72.7	12	36.7	99	0.03	98	0
1949	49.4	111	66.3	78	32.4	115	1.46	44	0
1948	47.2	116	62.7	109	31.7	116	2.20	28	0
1947			68.2	55			1.78	33	7
1946			68.4	52			1.56	38	9
1945	53	70	68.3	53	37.6	88	4.16	9	0
1944	54	56	69.2	43	38.9	72	0.83	63	0
1943	53.3	66	64.5	94	42	30	6.76	2	0
1942	54.9	37	70.8	24	39	70	0.74	65	0
1941	52	85	64.8	88	39.1	69	3.22	15	0
1940	56.8	20	70.4	30	43.2	24	4.97	6	0
1939	59.3	3	77.2	2	41.3	41	0.41	78	0
1938	57.7	9	71.8	16	43.6	18	4.59	8	0
1937	56.5	25	71.2	20	41.7	35	1.77	34	0
1936	53.2	67	66.9	67	39.5	63	5.78	3	0
1935	53.6	63	69.1	46	38.2	80	0.86	60	0
1934									9
1933	53	70	68.5	51	37.5	89	1.77	34	0
1932									4
1931	47.4	115	59.2	118	35.5	106	2.77	20	0
1930									8
1929	56.5	25	72.8	11	40.1	53	0.00	107	0
1928	51.2	96	65.4	86	37	95	1.47	43	0
1927	50.6	105	61.6	113	39.5	63	2.34	26	0
1926	50.9	99	63.4	106	38.3	77			0
1925	57.5	12	73.2	9	41.8	32			0
1924	51.8	88	65.4	86	38.3	77			0
1923	52.6	77	66.5	75	38.7	74			0
1922	55.3	35	67.4	60	43.3	23			0
1921	56.4	28	69.4	41	43.5	19			0
1920	51.5	91	66.6	73	36.3	103			0
1919	54.5	42	70.7	26	38.2	80			0
1918	50.5	107	67.1	63	33.8	113			3
1917	57.7	9	78.9	1	36.6	100			0
1916	51.3	94	65.7	82	36.8	97	1.57	37	0
1915	54.5	42	69.5	39	38.8	73	2.80	19	2
1914	50.4	108	61.8	112	39	70	2.54	22	0
1913	53	70	66.2	80	39.8	58	1.00	56	0
1912	52	85	68.9	48	35.1	108	0.02	100	0
1911	50.8	101	67	66	34.6	110	0.86	60	0
1910	53.7	61	70.1	33	37.2	93	0.04	96	0
1909	49.5	110	59.4	116	39.6	61			0
1908	51	97	64.7	90	37.4	91	0.65	69	0
1907	52.7	74	67.1	63	38.4	75	0.90	58	0
1906	52.2	82	66.4	77	38	83			1
1905	50.8	101	66.9	67	34.8	109	0.48	76	0
1904	53.1	69	69.2	43	37	95	1.11	52	0
1903	51.7	89	70.7	26	33.2	114	0.03	98	1
1902	50.8	101	66.9	67	34.6	110	1.64	36	0
1901	54.7	39	73.9	6	35.4	107	trace	102	0
1895	51.3	94	66.9	67	35.7	105	0.25	84	1
1894	51	97	61.3	114	40.4	50	5.18	5	1
1893	54.2	50	63.7	102	44.6	8	2.07	29	1

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2025	60.1
2017	60
1939	59.3
2023	59
2000	59
2024	58.2
1977	58
1980	57.9
1958	57.7
1938	57.7
More years share the last value

Coldest
Year	Mean, °F
1948	47.2
1931	47.4
1971	48.5
1951	49.3
1952	49.4
1949	49.4
1909	49.5
1978	50.1
1914	50.4
1918	50.5

Wettest
Year	Precipitation, in
2010	6.88
1943	6.76
1936	5.78
1951	5.49
1894	5.18
1940	4.97
1966	4.88
1938	4.59
1945	4.16
1984	4.12

Driest
Year	Precipitation, in
2005	0.00
1963	0.00
1958	0.00
1929	0.00
2024	trace
2017	trace
2000	trace
1990	trace
1901	trace
1969	0.02
More years share the last value

The hottest, coldest and wettest days

Hottest day: 88°F; 10 December 2025
Coldest night: 41°F; 28 December 2025, 5 December 2025
Wettest day: 0.72 in; 24 December 2025

Every month, season and year

Months

Seasons

Years

Riverside, CA the day's answers

All-time records

Every answer in words

December 2025 brought 1.19 in of precipitation in Riverside, CA, the wettest December since 2022, 49th wettest of 110.
The hottest day of December 2025 in Riverside, CA: 88°F on Wednesday 10 December 2025.
The coldest night of December 2025 in Riverside, CA: a low of 41°F on Sunday 28 December 2025 and Friday 5 December 2025.
The wettest day of December 2025 in Riverside, CA: 0.72 in on Wednesday 24 December 2025.