El Cajon, CA: September

30 September 2026: September 2026 averaged 77.2°F in El Cajon, CA, the warmest September since 2022, 9th warmest of 107.

September 2026

Mean temperature: 77.2°F; Warmest since 2022; 9th warmest of 107
Precipitation: 0.05 in; Wettest since 2025; 46th wettest of 118

The mean temperature of every September in El Cajon, CA since 1899: 77.2°F in 2026; the highest is 79°F, in 2015 and 2014.

Every year, ranked, as a table

Every September in El Cajon, CA from 1899 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	77.2	9	87.8	46	66.6	5	0.05	46	0
2025	75.8	14	85.8	72	65.7	7	0.17	29	0
2024	74.5	30	86.4	62	62.7	21	0.00	73	0
2023	72.2	60	81.1	103	63.4	14	0.05	46	0
2022	77.7	6	88.9	33	66.4	6	0.11	34	0
2021	75.8	14	87.1	54	64.4	11	0.13	33	0
2020	78	4	93.2	3	62.9	18	0.00	73	0
2019	74.9	24	86.2	67	63.5	13	0.06	44	0
2018	74.3	32	85.9	71	62.6	23	0.00	73	0
2017	74.7	27	85.4	77	64	12	0.03	49	0
2016	73.9	38	85.1	83	62.7	21	0.49	12	0
2015	79	1	90.3	25	67.6	2	0.42	14	0
2014	79	1	90.4	21	67.5	4	0.00	73	1
2013	74.7	27	86	69	63.3	16	0.00	73	0
2012	78.1	3	91.2	16	65	9	0.00	73	0
2011	72.9	47	84.2	89	61.5	29	0.10	36	0
2010	73.2	44	87.4	50	59.1	48	0.28	21	0
2009	76.9	10	90.8	18	63.1	17	0.00	73	0
2008	77.3	8	91.5	12	62.6	23	0.00	73	3
2007									7
2006	75.3	17	92.2	7	58.6	49	0.00	73	3
2005									5
2004							0.00	73	12
2003	75.1	21	87.9	45	62.3	25	0.00	73	3
2002							0.74	7	8
2001	74.5	30	88.3	39	60.7	37	0.00	73	0
2000	74.7	27	88.4	38	61.1	33	0.00	73	0
1999	72.1	61	84.6	87	59.6	44	0.02	50	1
1996							0.00	73	13
1995	76.9	10	90.4	21	62.9	18	0.00	73	2
1993					60.1	41	trace	55	5
1992	76	13	89.9	26	62.2	26	0.00	73	1
1990			86.4	62			0.00	73	5
1989							0.20	25	9
1988							0.00	73	8
1987					61	35	0.68	8	4
1986	68.6	98	79.3	109	57.6	56	0.86	5	2
1985							0.21	24	7
1984					68.2	1	0.00	73	5
1983	77.5	7	91.8	8	63.4	14	0.19	26	2
1982					61.3	32	0.60	9	4
1981	75.3	17	88.6	35	61.9	28	0.00	73	0
1980	72.8	50	85.6	75	60	42	0.00	73	0
1978					59.6	44	0.77	6	6
1977	72.6	54	84.7	86	60.5	38	0.00	73	0
1976	72.9	47	80.9	105	64.8	10	1.64	3	0
1975	74.2	34	87.5	49	60.8	36	0.08	42	0
1974	74.2	34	86.3	64	62.1	27	0.00	73	0
1973	69.8	89	81.1	103	58.6	49	0.00	73	0
1972	71.9	64	83.4	92	60.4	39	0.22	22	0
1971	74.2	34	87	58	61.4	30	0.18	27	0
1970	71.5	70	87.1	54	55.9	72	0.00	73	0
1969	75.1	21	87.4	50	62.8	20	0.01	53	0
1968	73	45	85.7	74	60.2	40	0.00	73	0
1967	75.2	20	85.3	81	65.1	8	0.01	53	0
1966	72.7	52	85.6	75	59.9	43	trace	55	0
1965	69.2	94	82.2	100	56.4	64	0.33	17	1
1964	70.7	79	85.4	77	56.1	65	trace	55	0
1963	75.8	14	90.4	21	61.1	33	2.40	2	0
1962	72.4	56	86.6	61	58.1	52	0.00	73	0
1961	70.4	83	84.5	88	56.8	61	trace	55	2
1960	76.4	12	91	17	61.4	30	0.02	50	2
1959	72.3	57	85.4	77	59.2	47	trace	55	0
1958	73.6	40	91.8	8	55.3	80	0.42	14	0
1957	71.3	72	87.2	52	55.4	78	0.00	73	1
1956	75.1	21	95	1	55.2	81	0.00	73	0
1955	74.1	37	91.3	14	56.8	61	0.00	73	0
1954	71.3	72	89.7	27	52.9	98	trace	55	0
1953	71.8	67	88	42	55.6	75	0.00	73	0
1952	74.9	24	93.7	2	56.1	65	trace	55	0
1951	71.9	64	87.8	46	56	67	0.10	36	0
1950	67.9	101	83.1	95	52.6	103	trace	55	0
1949	72.3	57	88.6	35	56	67	0.00	73	0
1948	71.2	75	89.6	28	52.7	102	0.00	73	0
1947	73.5	42	89.6	28	57.9	54	0.15	30	1
1946	73	45	91.7	10	54.3	91	0.02	50	1
1945	73.4	43	88.5	37	58.2	51	0.18	27	0
1944	70.3	84	85.4	77	55.2	81	0.00	73	0
1943	72.8	50	91.5	12	54.5	88	0.10	36	3
1942	69.3	93	85.1	83	53.4	96	trace	55	0
1941	67.4	102	83	96	51.8	109	0.40	16	0
1940	69.9	87	85.2	82	54.6	86	0.11	34	0
1939			88.1	41			5.03	1	7
1938	74.3	32	92.7	5	56	67	trace	55	0
1937	73.6	40	89.1	32	58	53	trace	55	0
1936	70.9	77	86.3	64	55.5	77	0.06	44	0
1935	71.8	67	86.3	64	57.2	59	0.10	36	0
1934	72.1	61	88.3	39	55.8	74	0.15	30	0
1933	66.7	104	80.8	106	52.6	103	trace	55	1
1932	66.6	105	80.3	107	52.8	100	0.00	73	0
1931	71.8	67	86	69	57.5	57	trace	55	0
1930	68.4	99	82	102	54.9	84	trace	55	0
1929	70	86	83.3	94	56.7	63	0.55	11	0
1928	72.6	54	92.3	6	52.8	100	0.00	73	0
1927	69.8	89	83.9	91	55.6	75	0.00	73	0
1926	68.4	99	84.2	89	52.6	103	0.00	73	0
1925	69.2	94	86.2	67	52.1	108	0.00	73	0
1924	71.9	64	90.5	20	53.2	97	trace	55	0
1923	71.5	70	87	58	56	67	0.09	41	0
1922	75.3	17	92.8	4	57.8	55			0
1921	70.5	82	87.1	54	53.9	95	0.96	4	0
1920	69.6	92	85.1	83	54	93	0.07	43	0
1919	70.8	78	85.8	72	55.9	72	0.30	19	0
1918	74.9	24	90.4	21	59.3	46	0.04	48	0
1917	72.9	47	91.3	14	54.6	86			0
1916	68.7	97	82.3	99	55.1	83	0.22	22	0
1915	66.2	106	80.2	108	52.2	107			0
1914	69.1	96	83.4	92	54.7	85	0.10	36	0
1913	73.8	39	90.6	19	57	60	0.00	73	0
1912	69.9	87	87.7	48	52.3	106	0.00	73	2
1911							0.46	13	18
1910	72.7	52	89.4	31	56	67	0.15	30	0
1909	70.6	80	87.2	52	54.1	92	0.00	73	0
1908	71.3	72	87.1	54	55.4	78	0.32	18	0
1907	69.8	89	88	42	51.6	111	0.00	73	0
1906	72	63	89.5	30	54.5	88	0.30	19	0
1905	71	76	88	42	54	93	0.57	10	0
1904	77.9	5	88.8	34	67.6	2	trace	55	3
1903	70.1	85	82.8	97	57.4	58	trace	55	0
1902	70.6	80	86.8	60	54.5	88	0.00	73	0
1901	67	103	82.1	101	51.8	109	0.00	73	0
1900	65.4	107	82.4	98	48.3	112	trace	55	0
1899	72.3	57	91.6	11	52.9	98	0.00	73	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2015	79
2014	79
2012	78.1
2020	78
1904	77.9
2022	77.7
1983	77.5
2008	77.3
2026	77.2
2009	76.9
More years share the last value

Coldest
Year	Mean, °F
1900	65.4
1915	66.2
1932	66.6
1933	66.7
1901	67
1941	67.4
1950	67.9
1930	68.4
1926	68.4
1986	68.6

Wettest
Year	Precipitation, in
1939	5.03
1963	2.40
1976	1.64
1921	0.96
1986	0.86
1978	0.77
2002	0.74
1987	0.68
1982	0.60
1905	0.57

Driest
Year	Precipitation, in
2024	0.00
2020	0.00
2018	0.00
2014	0.00
2013	0.00
2012	0.00
2009	0.00
2008	0.00
2006	0.00
2004	0.00
More years share the last value

The hottest, coldest and wettest days

Hottest day: 105°F; 9 September 2026
Coldest night: 57°F; 3 September 2026
Wettest day: 0.05 in; 27 September 2026

Every month, season and year

Months

Seasons

Years

El Cajon, CA the day's answers

All-time records

Every answer in words

September 2026 brought 0.05 in of precipitation in El Cajon, CA, the wettest September since 2025, tied 46th wettest of 118 (with 2023).
The hottest day of September 2026 in El Cajon, CA: 105°F on Wednesday 9 September 2026.
The coldest night of September 2026 in El Cajon, CA: a low of 57°F on Thursday 3 September 2026.
The wettest day of September 2026 in El Cajon, CA: 0.05 in on Sunday 27 September 2026.