Average September Temperature in San Jacinto by Year

This page contains a list of the average monthly high and low temperatures in San Jacinto, California for the month of September each year between 1893 and 2023. It is based on NOAA data.

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What Was the Hottest September Ever in San Jacinto?

2012 was the warmest September in the history of San Jacinto, California. The average daily high temperature was 98.1 °F, and the average low was 64.7 °F.

What Was the Coldest September Ever in San Jacinto?

1904 was the coolest September in the history of San Jacinto, California. The average daily high temperature was 77.8 °F, and the average low was 50.2 °F.

* click column headers to sort

Year	Rank	High (°F)	Low (°F)
2023	53	85.9	62.0
2022	3	92.9	66.5
2021	13	92.8	62.5
2020	2	98.2	62.5
2019	23	90.2	62.9
2018	17	94.3	60.6
2017	32	88.3	62.4
2016	46	88.6	60.3
2015	6	92.6	65.0
2014	5	95.3	63.0
2013	11	94.0	61.4
2012	1	98.1	64.7
2011	16	94.1	60.9
2010	27	93.8	58.3
2009	4	97.3	61.4
2007	61	90.3	56.3
2005	71	90.1	55.0
2001	22	95.9	57.5
2000	34	92.7	57.8
1999	50	92.1	56.0
1998	65	88.7	57.3
1997	8	94.2	61.5
1995	10	95.7	59.7
1994	38	92.0	58.0
1991	14	95.9	59.3
1990	31	94.5	56.9
1986	105	85.2	52.0
1983	9	95.7	59.8
1982	59	90.3	56.8
1980	48	94.2	54.3
1977	62	90.9	55.6
1976	82	82.5	60.5
1975	25	96.3	55.8
1974	19	98.0	55.7
1973	90	91.0	51.4
1972	70	89.9	55.2
1971	29	95.8	56.0
1970	64	96.3	49.7
1969	18	98.0	56.8
1968	36	95.6	54.6
1967	33	92.6	57.9
1966	49	95.7	52.5
1965	100	89.6	49.7
1964	79	95.2	48.3
1963	24	96.6	56.5
1962	43	98.2	50.9
1961	77	91.2	52.7
1959	88	88.6	54.3
1958	37	95.9	54.4
1957	66	92.9	52.7
1956	21	99.5	54.0
1955	42	95.5	53.8
1954	97	94.9	45.6
1953	74	96.4	47.9
1952	57	96.5	50.7
1951	54	98.1	49.8
1950	92	89.8	52.3
1949	41	97.6	51.9
1947	30	97.7	54.0
1945	55	91.0	56.8
1944	78	89.7	53.9
1943	40	95.1	54.5
1942	101	90.0	49.1
1941	108	87.4	47.3
1940	99	88.9	50.5
1939	39	91.9	58.1
1937	15	98.6	56.5
1936	51	93.7	54.4
1935	45	94.1	54.9
1934	52	93.4	54.6
1933	89	92.9	49.8
1932	60	94.0	52.8
1931	69	91.1	54.1
1930	102	88.3	50.8
1929	75	88.9	55.3
1928	20	99.9	53.6
1927	95	90.6	50.1
1926	81	94.8	48.3
1925	107	88.5	48.4
1924	56	95.6	51.9
1923	67	88.0	57.4
1922	12	95.9	59.5
1921	91	90.4	51.8
1920	87	89.1	53.8
1919	72	89.6	55.2
1918	63	89.5	57.0
1917	28	96.4	55.5
1916	94	91.2	50.4
1915	84	89.1	53.8
1914	73	89.4	55.1
1913	26	94.2	58.0
1912	85	90.3	52.6
1911	80	91.0	52.4
1910	35	95.2	55.3
1909	76	91.0	53.2
1908	68	91.8	53.6
1907	93	94.5	47.6
1906	58	94.0	53.2
1905	96	90.2	50.4
1904	111	77.8	50.2
1903	86	86.6	56.3
1902	44	94.2	54.9
1901	106	88.3	48.9
1900	109	84.4	48.3
1899	7	101.2	55.6
1898	47	94.3	54.3
1897	103	86.9	51.8
1896	98	87.6	51.8
1895	104	90.6	47.4
1894	83	91.6	51.4
1893	110	83.8	48.0

Weather Station Details

Years	Station	Coordinates
1978–2024	San Jacinto	location
1893–1978	San Jacinto	location