El Cajon, CA

16 September 2026: 2026 so far averaged 68.4°F in El Cajon, CA (15 days missing), the warmest 1 January to 16 September since 2015, 3rd warmest of 100.

Wednesday 16 September 2026

High: 80°F; Coldest since 2024; 19th coldest of 119
Low: 66°F; Warmest since 2025; 9th warmest of 121

No measurable precipitation in El Cajon, CA for at least 1 day to Wednesday 16 September 2026.

Every 16 September high in El Cajon, CA since 1899: 80°F in 2026; the highest is 111°F, in 1929.

Every year as a table

Every 16 September low in El Cajon, CA since 1899: 66°F in 2026; the lowest is 40°F, in 1900.

Year	High, °F	Low, °F
2026	80	66
2025	96	67
2024	72	59
2023	71	65
2022	80	58
2021	81	62
2020	100	60
2019	88	66
2018	91	62
2017	78	63
2016	82	53
2015	80	66
2014	104	74
2013	89	64
2012	89	64
2011	75	61
2010	84	56
2009	85	58
2008	96	61
2007	84	56
2006	84	55
2005	79	60
2004	85	67
2003	87	63
2002		60
2001	88	61
2000	102	65
1999	77	55
1996	80	65
1995	82	66
1993	70	61
1992	92	63
1990	90	63
1988	80	62
1987	82	63
1986	82	59
1985	81	54
1984	96	70
1983	91	62
1982		60
1981	95	61
1980	92	58
1978	76	61
1977	77	59
1976	76	64
1975	97	67
1974	85	56
1973	80	58
1972	84	59
1971	81	67
1970	84	50
1969	80	59
1968	80	65
1967	82	65
1966	92	63
1965	79	62
1964	81	57
1963	80	60
1962	85	54
1961	77	63
1960	80	61
1959	77	54
1958	101	50
1957	81	54
1956	95	54
1955	81	58
1954	83	54
1953	86	55
1952	92	52
1951	90	57
1950	79	55
1949	83	55
1948	92	58
1947	88	58
1946	82	55
1945	82	60
1944	80	54
1943	89	47
1942	87	59
1941	85	49
1940	89	50
1939	98	52
1938	91	58
1937	100	60
1936	85	55
1935	94	56
1934	99	66
1933	83	58
1932	85	53
1931	72	56
1930	84	57
1929	111	55
1928	98	53
1927	78	58
1926	80	52
1925	86	52
1924	99	56
1923	81	57
1922	107	56
1921	80	53
1920	86	63
1919	94	54
1918	89	66
1917	99	54
1916	84	57
1915	79	48
1914	86	45
1913	106	58
1912	88	52
1910	88	60
1909	105	68
1908	78	57
1907	90	42
1906	90	54
1905	85	52
1904	84	68
1903	100	58
1902	80	60
1901	88	56
1900	84	40
1899	97	45

The forecast

Date	High	Low
6 October	103°FRecord at riskRecord 103°F, 1964	73°FRecord at riskRecord 42°F, 1900
7 October	Record 101°F, 2008, 1953	Record 40°F, 1932, 1900

The month and the year

Every day as a table

Daily highs and lows in El Cajon, CA, 1 to 16 September 2026, with each date's record range and its 1991 to 2020 normal range.

Day	High, °F	Low, °F	Record high	Year	Record low	Year
1 September 2026			113	1955	46	1941
2 September 2026			111	1955	48	1946
3 September 2026			110	2007	48	1946
4 September 2026			109	1988	42	1899
5 September 2026			114	2020	50	1940
6 September 2026			110	1955	45	1942
7 September 2026			109	1944	45	1943
8 September 2026			108	2024	45	1943
9 September 2026			108	1956	48	1965
10 September 2026			106	1956	47	1931
11 September 2026			108	1971	42	1905
12 September 2026			108	1971	44	1912
13 September 2026			110	1971	44	1934
14 September 2026			103	1955	42	1900
15 September 2026			108	1989	43	1954
16 September 2026	80	66	111	1929	40	1900

The warmest, coldest and wettest on this date

The 20 warmest 16 September highs in El Cajon, CA since 1899.
Rank	Year	High, °F
1	1929	111
2	1922	107
3	1913	106
4	1909	105
5	2014	104
6	2000	102
7	1958	101
8	2020	100
8	1937	100
8	1903	100
11	1934	99
11	1924	99
11	1917	99
14	1939	98
14	1928	98
16	1975	97
16	1899	97
18	2025	96
18	2008	96
18	1984	96

The 20 coldest 16 September lows in El Cajon, CA since 1899.
Rank	Year	Low, °F
1	1900	40
2	1907	42
3	1914	45
3	1899	45
5	1943	47
6	1915	48
7	1941	49
8	1970	50
8	1958	50
8	1940	50
11	1952	52
11	1939	52
11	1926	52
11	1925	52
11	1912	52
11	1905	52
17	2016	53
17	1932	53
17	1928	53
17	1921	53

The 20 wettest 16 September days in El Cajon, CA since 1899.
Rank	Year	Precipitation, in
1	1978	0.66
2	2015	0.12
2	1982	0.12
4	1965	0.01
4	1920	0.01
6	1993	trace
6	1989	trace
6	1961	trace
9	2026	0.00
9	2025	0.00
9	2024	0.00
9	2023	0.00
9	2022	0.00
9	2021	0.00
9	2020	0.00
9	2019	0.00
9	2018	0.00
9	2017	0.00
9	2016	0.00
9	2014	0.00

Every answer in words

Wednesday 16 September 2026: a high of 80°F in El Cajon, CA, the coldest 16 September day since 2024, tied 19th coldest of 119 (with 2022, 2015, 1996 and 10 other years).
Wednesday 16 September 2026: a low of 66°F in El Cajon, CA, the warmest 16 September night since 2025, tied 9th warmest of 121 (with 2019, 2015, 1995 and 2 other years).
Forecast for Tuesday 6 October 2026: a high of 103°F in El Cajon, CA, which would tie the record for the warmest 6 October, set in 1964 (National Weather Service forecast).
Forecast for Tuesday 6 October 2026: a low of 73°F in El Cajon, CA, which would beat the record for the warmest 6 October night, 71°F in 1972 (National Weather Service forecast).
El Cajon, CA on 6 October: record high 103°F (1964), record low 42°F (1900).
El Cajon, CA on 7 October: record high 101°F (2008 and 1953), record low 40°F (1932 and 1900).
El Cajon, CA has had 42 days at 90°F or above in 2026 through 16 September (15 days missing), the most by that date since 2022, tied 34th most of 100 (with 2021, 2016, 1939 and 2 other years).
El Cajon, CA has had 3 days at 100°F or above in 2026 through 16 September (15 days missing), the most by that date since 2024, tied 60th most of 100 (with 2021, 2018, 2013 and 9 other years).

Nearby

San Diego, CA 15.5 mi
Ramona, CA 16.4 mi
Escondido, CA 24.1 mi
Palm Springs, CA 74.7 mi
El Centro, CA 78.5 mi
San Diego County, CA county average
California every city and county

All-time records

About these figures

Daily records for El Cajon, CA run from 1899 to 16 September 2026, with 2469 days missing; current station EL CAJON.

Our calculation from NOAA records for El Cajon, CA, 1899 to 2026. Preliminary until NOAA's final data.