San Diego, CA: September

30 September 2026: September 2026 averaged 74.8°F in San Diego, CA, the warmest September since 2022, tied 8th warmest of 151 (with 2012).

September 2026

Mean temperature: 74.8°F; Warmest since 2022; 8th warmest of 151
Precipitation: 0.02 in; Wettest since 2025; 72nd wettest of 170

A normal September in San Diego, CA (1991 to 2020): a mean temperature of 71.3°F, between 68.8°F and 74.8°F in eight years of ten and 0.00 in of precipitation, between 0.00 in and 0.31 in in eight years of ten.

The mean temperature of every September in San Diego, CA since 1875: 74.8°F in 2026; the highest is 78.9°F, in 1984.

Normal range, 68.8 to 74.8°F

Every year, ranked, as a table

Every September in San Diego, CA from 1851 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	74.8	8	80.4	14	69.2	8	0.02	72	0
2025	72.1	27	77	46	67.1	16	0.46	15	0
2024	72.1	27	77.4	37	66.9	21	0.02	72	0
2023	70.9	45	75.7	68	66.1	33	0.05	54	0
2022	75.6	5	81.8	7	69.3	7	0.65	10	0
2021	72.5	20	77.7	33	67.3	14	0.50	13	0
2020	74.2	11	81.9	6	66.5	24	0.00	136	0
2019	72.4	22	78.3	25	66.5	24	0.11	40	0
2018	71.9	33	76.7	50	67.1	16	trace	84	0
2017	72.8	17	78.6	23	67	20	0.08	44	0
2016	72	31	78.1	27	66	34	0.32	21	0
2015	77.2	2	83	2	71.4	3	1.24	3	0
2014	75.6	5	81	10	70.1	4	trace	84	0
2013	71.5	36	77.3	43	65.7	36	trace	84	0
2012	74.8	8	80.7	11	68.8	10	trace	84	0
2011	68.8	82	73.5	107	64	57	0.13	35	0
2010	68.8	82	74.3	95	63.3	73	0.03	64	0
2009	72.1	27	77.5	34	66.7	22	trace	84	0
2008	71.1	42	75.9	63	66.4	26	trace	84	0
2007	69.5	75	74.6	89	64.5	53	0.05	54	0
2006	70.2	56	75.6	70	64.8	46	0.00	136	0
2005	68.5	89	74.1	101	62.9	82	0.10	42	0
2004	72.6	19	78.1	27	67.1	16	trace	84	0
2003	69.9	66	74	102	65.7	36	trace	84	0
2002	70	61	75.5	72	64.6	49	0.31	22	0
2001	68.2	96	73.2	112	63.2	77	0.00	136	0
2000	70.5	47	75.5	72	65.4	40	trace	84	0
1999	66.9	116	71.4	136	62.5	93	0.02	72	0
1998	70.3	53	74.3	95	66.2	29	0.03	64	0
1997	75.2	7	81.2	8	69.2	8	0.85	7	0
1996	70.6	46	74.6	89	66.6	23	0.03	64	0
1995	71.4	39	77.4	37	65.5	39	trace	84	0
1994	72.5	20	78.7	21	66.3	28	trace	84	0
1993	69	81	74.9	81	63.1	79	trace	84	0
1992	72.4	22	79.1	17	65.7	36	0.00	136	0
1991	69.4	77	74.7	88	64	57	0.28	24	0
1990	71.7	34	77.4	37	66	34	trace	84	0
1989	70.3	53	77.4	37	63.3	73	0.23	28	0
1988	70	61	76	61	64	57	trace	84	0
1987	69.9	66	75.4	74	64.4	54	0.70	9	0
1986	66.9	116	71.9	125	61.9	98	1.04	5	0
1985	69.8	70	75.7	68	63.9	61	0.20	30	0
1984	78.9	1	83.7	1	74	1	trace	84	0
1983	76.8	3	82.1	5	71.5	2	0.21	29	0
1982	73.1	16	78.9	19	67.3	14	0.38	19	0
1981	73.6	14	78.7	21	68.6	11	0.03	64	0
1980	70.4	50	74.6	89	66.2	29	trace	84	0
1979	76.3	4	82.6	3	69.9	5	0.00	136	0
1978	73.9	12	80.4	14	67.5	13	0.72	8	0
1977	72.2	25	76.7	50	67.7	12	trace	84	0
1976	73.8	13	77.9	32	69.6	6	1.00	6	0
1975	71.5	36	77.5	34	65.4	40	trace	84	0
1974	70.2	56	75.1	76	65.4	40	trace	84	0
1973	68.8	82	74.3	95	63.3	73	0.02	72	0
1972	68.7	85	74	102	63.4	72	0.44	16	0
1971	72.2	25	78	30	66.4	26	trace	84	0
1970	69.7	71	76.3	57	63	81	trace	84	0
1969	69.9	66	75.2	75	64.6	49	trace	84	0
1968	71.2	41	77.5	34	65	44	trace	84	0
1967	72	31	76.9	47	67.1	16	0.08	44	0
1966	69.9	66	75.9	63	63.8	63	trace	84	0
1965	68.5	89	75	79	62	97	0.29	23	0
1964	67.7	109	74.2	99	61.2	116	0.00	136	0
1963	74.3	10	82.3	4	66.2	29	1.90	2	0
1962	68.4	92	74.9	81	61.9	98	0.00	136	0
1961	69.5	75	77.2	44	61.9	98	trace	84	0
1960	72.3	24	79.7	16	64.8	46	0.06	52	0
1959	71.6	35	76.9	47	66.2	29	0.04	57	0
1958	72.7	18	80.5	13	64.9	45	0.62	12	0
1957	70	61	76.5	54	63.6	67	0.37	20	0
1956	72.1	27	80.6	12	63.5	69	trace	84	0
1955	71.5	36	78.2	26	64.7	48	trace	84	0
1954	69.3	79	76.7	50	61.9	98	0.00	136	0
1953	68.1	101	74.8	85	61.4	110	trace	84	0
1952	70.4	50	78	30	62.9	82	trace	84	0
1951	67.8	107	74.2	99	61.3	113	0.04	57	0
1950	67.4	111	73.4	108	61.5	109	trace	84	0
1949	70	61	77.1	45	62.8	87	trace	84	0
1948	68.3	93	76.3	57	60.3	133	trace	84	0
1947	71.1	42	78.9	19	63.3	73	0.18	32	0
1946	71.1	42	78.4	24	63.7	66	trace	84	0
1945	71.4	39	79.1	17	63.6	67	0.03	64	0
1944	66.9	116	73.4	108	60.4	129	trace	84	0
1943	68.7	85	76.3	57	61.1	119	0.04	57	0
1942	67.8	107	74.9	81	60.6	126	0.00	136	0
1941	68	104	75.8	66	60.2	135	0.28	24	0
1940	68.7	85	75.8	66	61.6	107	0.08	44	0
1939	73.2	15	81.2	8	65.1	43	3.14	1	0
1938	70.4	50	76.8	49	64.1	56	0.00	136	1
1937	69.4	77	74.9	81	63.8	63	trace	84	0
1936	68.1	101	73.4	108	62.7	90	0.04	57	0
1935	67.3	113	71.9	125	62.7	90	0.01	80	0
1934	69.7	71	75.9	63	63.5	69	0.18	32	0
1933	62.7	151	66.9	151	58.6	149	0.02	72	0
1932	65.6	142	69.9	148	61.3	113	0.00	136	0
1931	69.7	71	75.6	70	63.8	63	trace	84	0
1930	66.9	116	71.9	125	61.9	98	trace	84	0
1929									5
1928	66.2	132	71.9	125	60.4	129	trace	84	0
1927	66.5	124	71.2	137	61.7	106	0.04	57	0
1926	66	137	71.2	137	60.8	125	0.00	136	0
1925	66.6	123	72.6	119	60.6	126	0.00	136	0
1924	66.4	130	72.7	118	60.2	135	0.00	136	0
1923	68.2	96	74	102	62.5	93	0.03	64	0
1922	70	61	76	61	64	57	0.00	136	0
1921	66.8	120	72.6	119	60.9	124	1.24	3	0
1920	66.2	132	71.2	137	61.1	119	0.08	44	0
1919	66.5	124	71.8	131	61.2	116	0.26	26	0
1918	70.5	47	76.5	54	64.6	49	0.08	44	0
1917	68.2	96	74.5	93	61.8	104	trace	84	0
1916	64.4	149	69.1	149	59.6	143	0.25	27	0
1915	66.5	124	71.5	134	61.4	110	trace	84	0
1914	66	137	71	142	61	121	trace	84	0
1913	70.3	53	76.7	50	63.9	61	0.02	72	0
1912	65.7	141	71.6	133	59.9	140	0.00	136	0
1911	66.2	132	72.3	121	60.1	137	0.10	42	0
1910	67.9	105	73.4	108	62.3	96	0.17	34	0
1909	66.7	121	73	113	60.3	133	0.02	72	0
1908	66.5	124	71.9	125	61.2	116	0.20	30	0
1907	65.1	146	71.1	140	59.1	147	0.00	136	0
1906	68.2	96	74.6	89	61.8	104	0.12	38	0
1905	66.4	130	71.5	134	61.3	113	0.50	13	0
1904	70.2	56	76.3	57	64.2	55	trace	84	0
1903	67.9	105	72.9	117	62.9	82	trace	84	0
1902	66.2	132	70.5	145	61.9	98	trace	84	0
1901	64.9	147	68.7	150	61	121	0.06	52	0
1900	65.6	142	71.1	140	60.1	137	trace	84	0
1899	65.5	144	70.6	144	60.4	129	0.00	136	0
1898	68.5	89	74.3	95	62.7	90	0.07	50	0
1897	68.1	101	73	113	63.2	77	trace	84	0
1896	66.7	121	73	113	60.4	129	trace	84	0
1895	67.4	111	75.1	76	59.7	142	0.01	80	0
1894	65.9	139	72.3	121	59.5	144	0.01	80	0
1893	64.6	148	70.5	145	58.6	149	0.00	136	0
1892	65.4	145	71.7	132	59.1	147	trace	84	0
1891	70.2	56	77.4	37	62.9	82	0.08	44	0
1890	69.1	80	75.1	76	63.1	79	0.65	10	0
1889	70.1	60	77.4	37	62.8	87	trace	84	0
1888	69.7	71	74.8	85	64.6	49	0.04	57	0
1887	66.2	132	70.9	143	61.4	110	trace	84	0
1886	67.6	110	72.3	121	62.8	87	0.00	136	0
1885	68.3	93	75	79	61.6	107	trace	84	0
1884	65.8	140	72.3	121	59.3	145	0.07	50	0
1883	70.5	47	78.1	27	62.9	82	0.00	136	0
1882	67.1	115	73.7	106	60.5	128	0.01	80	0
1881	66.5	124	73.8	105	59.2	146	0.04	57	0
1880	63.8	150	70	147	57.6	151	0.00	136	0
1879	67.2	114	74.4	94	60	139	0.00	136	0
1878	68.2	96	76.4	56	59.9	140	0.00	136	0
1877	68.6	88	74.8	85	62.5	93	trace	84	0
1876	66.5	124	71.9	125	61	121	0.03	64	0
1875	68.3	93	73	113	63.5	69	0.39	18	0
1874							0.13	35	30
1873							0.00	136	30
1872							0.00	136	30
1870							0.00	136	30
1865							0.00	136	30
1864							0.00	136	30
1863							0.40	17	30
1862							0.00	136	30
1861							0.12	38	30
1860							0.03	64	30
1859							0.00	136	30
1858							0.11	40	30
1857							0.00	136	30
1856							0.05	54	30
1855							0.00	136	30
1854							0.13	35	30
1853							0.00	136	30
1852							0.00	136	30
1851							0.02	72	30

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1984	78.9
2015	77.2
1983	76.8
1979	76.3
2022	75.6
2014	75.6
1997	75.2
2026	74.8
2012	74.8
1963	74.3

Coldest
Year	Mean, °F
1933	62.7
1880	63.8
1916	64.4
1893	64.6
1901	64.9
1907	65.1
1892	65.4
1899	65.5
1932	65.6
1900	65.6

Wettest
Year	Precipitation, in
1939	3.14
1963	1.90
2015	1.24
1921	1.24
1986	1.04
1976	1.00
1997	0.85
1978	0.72
1987	0.70
2022	0.65
More years share the last value

Driest
Year	Precipitation, in
2020	0.00
2006	0.00
2001	0.00
1992	0.00
1979	0.00
1964	0.00
1962	0.00
1954	0.00
1942	0.00
1938	0.00
More years share the last value

The hottest, coldest and wettest days

Hottest day: 95°F; 7 September 2026, 6 September 2026
Coldest night: 63°F; 29 September 2026, 3 September 2026
Wettest day: 0.02 in; 27 September 2026

Every month, season and year

Months

Seasons

Years

San Diego, CA the day's answers

All-time records

Every answer in words

September 2026 brought 0.02 in of precipitation in San Diego, CA, the wettest September since 2025, tied 72nd wettest of 170 (with 2024, 1999, 1973 and 4 other years).
The hottest day of September 2026 in San Diego, CA: 95°F on Monday 7 September 2026 and Sunday 6 September 2026.
The coldest night of September 2026 in San Diego, CA: a low of 63°F on Tuesday 29 September 2026 and Thursday 3 September 2026.
The wettest day of September 2026 in San Diego, CA: 0.02 in on Sunday 27 September 2026.