San Jose, CA: September

30 September 2026: September 2026 averaged 69.1°F in San Jose, CA, the warmest September since 2025, tied 34th warmest of 128 (with 1952).

September 2026

Mean temperature: 69.1°F; Warmest since 2025; 34th warmest of 128
Precipitation: 0.06 in; Wettest since 2025; 50th wettest of 131

A normal September in San Jose, CA (1991 to 2020): a mean temperature of 69.5°F, between 67.1°F and 70.9°F in eight years of ten and 0.01 in of precipitation, between 0.00 in and 0.18 in in eight years of ten.

The mean temperature of every September in San Jose, CA since 1893: 69.1°F in 2026; the highest is 73.4°F, in 2017.

Normal range, 67.1 to 70.9°F

Every year, ranked, as a table

Every September in San Jose, CA from 1893 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	69.1	34	80.4	58	57.8	22	0.06	50	0
2025	71.8	8	81.3	40	62.2	1	0.44	19	0
2024	71.9	5	84	9	59.7	6	0.00	96	0
2023	69.5	24	80.2	65	58.8	10	0.08	47	0
2022	72.8	3	84.4	7	61.2	3	0.51	16	0
2021	70.1	15	82.4	23	57.8	22	0.00	96	0
2020	71.9	5	83	13	60.8	4	0.00	96	0
2019	69.5	24	81.1	48	57.9	20	0.13	39	0
2018	67.6	63	80.3	61	55	66	0.00	96	1
2017	73.4	1	85.2	3	61.6	2	0.04	57	0
2016	69.6	23	81.5	36	57.6	27	trace	76	0
2015	70.2	14	82.4	23	58	17	0.01	69	0
2014	68.4	44	78.2	96	58.6	12	0.36	21	0
2013	68.2	47	79	84	57.3	31	0.66	12	0
2012	65.7	92	77.4	108	53.9	81	0.01	69	0
2011	70.4	12	82.5	22	58.3	13	trace	76	0
2010	70.1	15	82.7	21	57.5	29	trace	76	0
2009	70.6	11	83.1	11	58	17	0.21	31	0
2008	69.8	21	82.3	25	57.2	34	trace	76	0
2007	67.6	63	78.5	91	56.6	40	trace	76	0
2006	67.2	69	78.7	90	55.7	52	0.00	96	0
2005	65.7	92	76.5	117	54.8	71	0.02	61	0
2004	70	17	82.8	18	57.1	36	0.06	50	0
2003	70	17	81.3	40	58.8	10	0.02	61	0
2002	69.9	19	81.5	36	58.2	14	0.00	96	0
2001	66.9	79	78	100	55.8	51	0.18	34	0
2000	69.4	30	81.7	33	57.1	36	0.10	44	0
1999	67.8	58	79.1	82	56.4	42	0.05	53	0
1998	68.8	38	79.5	76	58	17	0.05	53	0
1997	72.9	2	85.6	2	60.2	5	0.00	96	0
1996	68.4	44	81.3	40	55.5	60	0.01	69	1
1995					57.4	30	0.00	96	5
1994	69.3	32	81	52	57.6	27	0.07	48	3
1993	68.7	40	80.7	56	56.7	39	0.00	96	0
1992	69.9	19	82.1	27	57.7	26	0.00	96	0
1991	69.8	21	81.5	36	58.1	16	0.12	41	0
1990	69.5	24	82	29	56.9	38	0.24	28	0
1989	67	76	77.8	102	56.1	46	0.83	8	0
1988	68.4	44	81.2	45	55.6	56	0.00	96	0
1987	69.3	32	81.2	45	57.3	31	0.00	96	0
1986	65.5	97	76.4	121	54.7	73	1.02	7	1
1985	67	76	77.6	104	56.3	44	0.35	22	0
1984	72	4	86	1	57.9	20	0.02	61	0
1983	71.6	9	84.3	8	58.9	8	0.49	17	0
1982	67.7	61	80.4	58	55	66	1.04	5	0
1981	67.1	71	78.9	85	55.2	63	0.02	61	0
1980	67.1	71	78.5	91	55.7	52	0.00	96	0
1979	71.9	5	84.9	4	58.9	8	0.00	96	0
1978	69.5	24	82.8	18	56.2	45	0.02	61	0
1977	67.1	71	78.8	87	55.4	62	0.58	15	0
1976	67.4	68	78.2	96	56.6	40	1.03	6	0
1975	65.9	90	78.1	99	53.6	84	0.01	69	0
1974	67.9	54	80.3	61	55.5	60	0.00	96	0
1973	66.6	84	78.5	91	54.8	71	0.04	57	0
1972	65.7	92	77	112	54.5	74	0.60	14	0
1971	69.5	24	83	13	56	48	0.12	41	0
1970	68.6	41	84.5	6	52.7	95	0.00	96	0
1969	69	36	81.9	31	56.1	46	0.14	38	0
1968	67.7	61	80.3	61	55	66	0.00	96	0
1967	70.3	13	82.8	18	57.8	22	0.02	61	0
1966	67.8	58	81.3	40	54.3	76	0.19	33	0
1965	64.9	104	77.1	111	52.7	95	trace	76	0
1964	67.1	71	80.3	61	54	79	0.00	96	1
1963	69.4	30	81	52	57.8	22	0.25	26	0
1962	66	89	77.6	104	54.4	75	trace	76	0
1961									10
1960	67.5	65	80.2	65	54.9	70	trace	76	0
1959	67	76	78.2	96	55.6	56	2.04	2	1
1958	71	10	84.8	5	57.3	31	0.04	57	0
1957	68.8	38	80.4	58	57.2	34	0.27	25	0
1956	67.9	54	80.2	65	55.6	56	0.45	18	1
1955	66.9	79	80.8	54	53.1	92	trace	76	0
1954	65.8	91	78.4	95	53.1	92	trace	76	0
1953	69	36	79.7	73	58.2	14	0.00	96	1
1952	69.1	34	82.2	26	56	48	trace	76	0
1951	66.6	84	77.6	104	55.6	56	0.22	30	0
1950	68.2	47	79.9	71	56.4	42	0.11	43	0
1949	68	52	80.8	54	55.1	65	trace	76	1
1948	65.5	97	79.4	78	51.6	101	trace	76	0
1947	67.9	54	82.1	27	53.6	84	0.00	96	0
1946	67.2	69	81.1	48	53.4	86	0.04	57	0
1945	67.9	54	81.7	33	54.1	77	0.00	96	0
1944	68.1	50	82.9	16	53.3	89	0.00	96	0
1943	68.6	41	81.6	35	55.7	52	0.00	96	0
1942	65.3	99	77.2	110	53.3	89	0.07	48	0
1941	66.6	84	79.8	72	53.4	86	trace	76	0
1940	67.1	71	78.5	91	55.7	52	0.18	34	0
1939	69.5	24	83	13	55.9	50	0.28	24	0
1938	66.8	81	79.7	73	53.8	82	0.18	34	0
1937	66.7	82	79.5	76	53.8	82	0.00	96	0
1936	68.2	47	83.1	11	53.4	86	0.00	96	1
1935	65.3	99	76.5	117	54.1	77	trace	76	0
1934	66.7	82	81.4	39	52	99	0.23	29	0
1933	64	114	76.7	114	51.4	103	0.01	69	0
1932	68	52	81.9	31	54	79	0.00	96	0
1931	64.6	108	77.6	104	51.5	102	trace	76	0
1930	63.7	117	74.2	125	53.2	91	0.05	53	0
1929	65.3	99	79.1	82	51.4	103	0.00	96	0
1928	64.8	105	78.9	85	50.7	108	0.00	96	0
1927	62.9	120	76.8	113	48.9	120	0.02	61	0
1926	62.6	122	77.3	109	47.8	123	0.00	96	0
1925	62.8	121	75.3	123	50.2	114	0.01	69	0
1924	65.3	99	80.2	65	50.4	112	trace	76	0
1923	67.5	65	82	29	53	94	0.62	13	0
1922	67.5	65	83.7	10	51.3	106	0.00	96	0
1921	64.5	109	80.2	65	48.8	121	0.21	31	0
1920	63.8	116	76.5	117	51.1	107	0.02	61	0
1919	63.9	115	78	100	49.8	116	0.25	26	0
1918	64.4	111	73.9	127	55	66	6.33	1	0
1917	66.5	87	81.3	40	51.7	100	0.01	69	0
1916	64.7	107	78.8	87	50.6	109	0.78	9	0
1915	64.4	111	79.2	80	49.6	117	0.00	96	0
1914	63.1	119	76.7	114	49.6	117	0.00	96	0
1913	67.8	58	82.9	16	52.7	95	trace	76	0
1912	65.7	92	79.3	79	52.1	98	0.71	11	0
1911	60.9	127	75.7	122	46.1	126	0.00	96	0
1910	62	123	76.5	117	47.6	125	0.09	45	0
1909	64.8	105	79.2	80	50.5	110	0.75	10	0
1908	64.5	109	78.8	87	50.2	114	0.09	45	0
1907	61.1	126	74.4	124	47.8	123	0.06	50	0
1906	64.3	113	79.6	75	49.1	119	0.13	39	0
1905	66.3	88	81.1	48	51.4	103	trace	76	0
1904	68.1	50	81.1	48	55.2	63	1.94	3	2
1903	65.7	92	81.2	45	50.3	113	0.00	96	1
1902							0.00	96	30
1901	65.3	99	80.1	70	50.5	110	0.44	19	0
1900	68.6	41	77.8	102	59.4	7	0.17	37	0
1899							0.00	96	30
1896	61.3	124	74.2	125	48.5	122	0.32	23	0
1895	61.3	124	76.6	116	46	127	0.05	53	0
1894	63.2	118	80.7	56	45.6	128	1.35	4	0
1893	58.8	128	72.9	128	44.7	129	trace	76	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2017	73.4
1997	72.9
2022	72.8
1984	72
2024	71.9
2020	71.9
1979	71.9
2025	71.8
1983	71.6
1958	71

Coldest
Year	Mean, °F
1893	58.8
1911	60.9
1907	61.1
1896	61.3
1895	61.3
1910	62
1926	62.6
1925	62.8
1927	62.9
1914	63.1

Wettest
Year	Precipitation, in
1918	6.33
1959	2.04
1904	1.94
1894	1.35
1982	1.04
1976	1.03
1986	1.02
1989	0.83
1916	0.78
1909	0.75

Driest
Year	Precipitation, in
2024	0.00
2021	0.00
2020	0.00
2018	0.00
2006	0.00
2002	0.00
1997	0.00
1995	0.00
1993	0.00
1992	0.00
More years share the last value

The hottest, coldest and wettest days

Hottest day: 97°F; 9 September 2026
Coldest night: 51°F; 28 September 2026
Wettest day: 0.03 in; 4 September 2026, 3 September 2026

Every month, season and year

Months

Seasons

Years

San Jose, CA the day's answers

All-time records

Every answer in words

September 2026 brought 0.06 in of precipitation in San Jose, CA, the wettest September since 2025, tied 50th wettest of 131 (with 2004 and 1907).
The hottest day of September 2026 in San Jose, CA: 97°F on Wednesday 9 September 2026.
The coldest night of September 2026 in San Jose, CA: a low of 51°F on Monday 28 September 2026.
The wettest day of September 2026 in San Jose, CA: 0.03 in on Friday 4 September 2026 and Thursday 3 September 2026.