San Diego, CA: records

4 October 2026: The hottest day on record in San Diego, CA: 111°F on Thursday 26 September 1963.

The record begins: 1850

All-time records

Hottest day: 111°F; 26 September 1963
Coldest night: 25°F; 7 January 1913
Wettest day: 3.34 in; 2 December 1854
Warmest night: 78°F; 4 September 2022, 10 August 2018, 11 September 2015, 17 September 1984, 9 September 1984
Coldest day: 45°F; 6 January 1913

Daily records by decade

New daily records set in San Diego, CA by decade since the 1900s: the most record highs, 101, came in the 1950s; the most record lows, 38, in the 1910s.

Record highs
Record lows

Every decade as a table

Decade	Record highs	Record lows	Years in the record
1850s	0	0	10
1860s	0	0	10
1870s	0	0	10
1880s	0	0	10
1890s	0	0	10
1900s	67	31	10
1910s	84	38	10
1920s	59	12	10
1930s	70	13	10
1940s	89	21	10
1950s	101	6	10
1960s	60	5	10
1970s	52	4	10
1980s	56	1	10
1990s	18	3	10
2000s	26	0	10
2010s	40	1	10
2020s	24	1	7

Records by month

Month	Highest	Lowest	Wettest day
January	88°F 15 January 2021, 10 January 1953	25°F 7 January 1913	2.73 in 22 January 2024
February	91°F 12 February 2022	34°F 16 February 1911, 6 February 1899, 11 February 1894 and 1 more	2.71 in 6 February 1937
March	99°F 29 March 1879	36°F 5 March 1894	2.36 in 24 March 1906
April	98°F 20 April 2009, 6 April 1989	39°F 7 April 1875	3.23 in 5 April 1926
May	98°F 25 May 1896	45°F 3 May 1915, 16 May 1894, 2 May 1883	1.63 in 14 May 2015
June	101°F 10 June 1979	50°F 14 June 1943, 4 June 1908, 13 June 1894 and 2 more	0.49 in 10 June 1990
July	100°F 30 July 1930	54°F 16 July 1884, 4 July 1880	1.03 in 18 July 2015
August	98°F 31 August 1955	54°F 29 August 1895, 28 August 1887, 19 August 1884 and 1 more	1.82 in 20 August 2023
September	111°F 26 September 1963	50°F 26 September 1907, 19 September 1882, 18 September 1882 and 1 more	1.23 in 30 September 1921
October	107°F 14 October 1961	43°F 30 October 1971	2.95 in 4 October 1925
November	100°F 4 November 2010	36°F 28 November 1919	2.68 in 9 November 1879
December	88°F 29 December 1963	32°F 26 December 1891, 25 December 1879	3.34 in 2 December 1854

Streaks, months and years

Longest heat streak	6 days	17 September to 22 September 1939	A high of 90°F or above
Wettest month	9.26 in	December 1921
Driest month	0.00 in	July 2025	and 195 more
Wettest year	27.59 in	1884
Driest year	3.41 in	1953

Every record in words

The coldest night on record in San Diego, CA: a low of 25°F on Tuesday 7 January 1913.
The wettest day on record in San Diego, CA: 3.34 in on Saturday 2 December 1854.
The warmest night on record in San Diego, CA: a low of 78°F on Sunday 4 September 2022, Friday 10 August 2018, Friday 11 September 2015 and 2 other days.
The coldest day on record in San Diego, CA: a high of 45°F on Monday 6 January 1913.
The longest run of days with a high of 90°F or above in San Diego, CA: 6 days, from Sunday 17 September to Friday 22 September 1939.
The wettest month on record in San Diego, CA: December 1921, with 9.26 in of precipitation.
The driest month on record in San Diego, CA: July 2025, with 0.00 in of precipitation (shared with 195 other months).
The wettest year on record in San Diego, CA: 1884, with 27.59 in of precipitation.
The driest year on record in San Diego, CA: 1953, with 3.41 in of precipitation.

San Diego, CA the day's answers