Riverside, CA: records

4 October 2026: The hottest day on record in Riverside, CA: 118°F on Friday 6 July 2018, Friday 17 July 1925 and Saturday 16 June 1917.

The record begins: 1893

All-time records

Hottest day: 118°F; 6 July 2018, 17 July 1925, 16 June 1917
Coldest night: 19°F; 7 January 1950
Wettest day: 4.42 in; 4 March 1938
Warmest night: 80°F; 8 September 2024, 4 September 2022, 2 September 2007, 22 July 2006, 21 September 1939
Coldest day: 37°F; 13 December 1932

Daily records by decade

New daily records set in Riverside, CA by decade since the 1920s: the most record highs, 63, came in the 1940s; the most record lows, 70, in the 1940s.

Record highs
Record lows

Every decade as a table

Decade	Record highs	Record lows	Years in the record
1890s	0	0	7
1900s	0	0	10
1910s	0	0	10
1920s	8	13	10
1930s	56	56	10
1940s	63	70	10
1950s	36	58	10
1960s	28	3	10
1970s	38	3	10
1980s	42	0	10
1990s	33	1	10
2000s	33	0	10
2010s	34	0	10
2020s	19	0	7

Records by month

Month	Highest	Lowest	Wettest day
January	94°F 8 January 1923	19°F 7 January 1950	2.70 in 26 January 1956
February	94°F 25 February 1921	24°F 15 February 1942, 16 February 1903	3.22 in 7 February 1937
March	102°F 20 March 2026, 10 March 1916	25°F 13 March 1954, 2 March 1903	4.42 in 4 March 1938
April	105°F 6 April 1989	29°F 4 April 1970	3.07 in 5 April 1926
May	110°F 29 May 1984	33°F 1 May 1915	1.39 in 1 May 1930
June	118°F 16 June 1917	35°F 11 June 1894	0.83 in 5 June 1993
July	118°F 6 July 2018, 17 July 1925	41°F 7 July 1948	1.34 in 19 July 2015
August	113°F 5 August 1997, 24 August 1926	40°F 27 August 1902	2.05 in 17 August 1977
September	117°F 6 September 2020, 5 September 2020	37°F 15 September 1902	1.83 in 15 September 2015
October	109°F 1 October 1980	30°F 30 October 1971	2.50 in 20 October 2004
November	100°F 3 November 2010	23°F 12 November 1950, 11 November 1950	2.11 in 11 November 1954
December	94°F 3 December 1958	21°F 12 December 1949, 26 December 1911	3.28 in 11 December 1943

Streaks, months and years

Longest heat streak	66 days	13 June to 17 August 1981	A high of 90°F or above
Wettest month	10.08 in	February 1998
Driest month	0.00 in	August 2026	and 301 more
Wettest year	22.94 in	1983
Driest year	3.40 in	2013

Every record in words

The coldest night on record in Riverside, CA: a low of 19°F on Saturday 7 January 1950.
The wettest day on record in Riverside, CA: 4.42 in on Friday 4 March 1938.
The warmest night on record in Riverside, CA: a low of 80°F on Sunday 8 September 2024, Sunday 4 September 2022, Sunday 2 September 2007 and 2 other days.
The coldest day on record in Riverside, CA: a high of 37°F on Tuesday 13 December 1932.
The longest run of days with a high of 90°F or above in Riverside, CA: 66 days, from Saturday 13 June to Monday 17 August 1981.
The wettest month on record in Riverside, CA: February 1998, with 10.08 in of precipitation.
The driest month on record in Riverside, CA: August 2026, with 0.00 in of precipitation (shared with 301 other months); provisional.
The wettest year on record in Riverside, CA: 1983, with 22.94 in of precipitation.
The driest year on record in Riverside, CA: 2013, with 3.40 in of precipitation.

Riverside, CA the day's answers