San Francisco Airport, CA: September

30 September 2026: September 2026 averaged 66°F in San Francisco Airport, CA, the warmest September since 2025, 23rd warmest of 82.

September 2026

Mean temperature: 66°F; Warmest since 2025; 23rd warmest of 82
Precipitation: 0.01 in; Driest since 2024; 32nd driest of 82

A normal September in San Francisco Airport, CA (1991 to 2020): a mean temperature of 64.8°F, between 62.3°F and 68.4°F in eight years of ten and 0.02 in of precipitation, between 0.00 in and 0.23 in in eight years of ten.

The mean temperature of every September in San Francisco Airport, CA since 1945: 66°F in 2026; the highest is 69.8°F, in 2017.

Normal range, 62.3 to 68.4°F

Every year, ranked, as a table

Every September in San Francisco Airport, CA from 1945 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	66	23	73.6	34	58.3	10	0.01	47	0
2025	67.4	11	74.4	26	60.3	3	0.07	31	0
2024	63	57	71.7	61	54.2	52	0.00	74	1
2023	66.1	21	73.3	40	58.9	7	0.03	41	0
2022	68.2	8	77.1	10	59.3	5	0.27	13	0
2021	64.9	30	73.4	38	56.4	24	0.00	74	0
2020	68.7	4	78.4	5	58.9	7	0.00	74	0
2019	68.1	10	77.1	10	59.1	6	0.06	34	0
2018	62.1	72	70.3	75	53.9	56	0.00	74	0
2017	69.8	1	79	3	60.5	2	0.22	19	0
2016	64.8	31	73.6	34	56	28	0.00	74	0
2015	67.1	14	76.4	14	57.7	12	0.02	44	0
2014	68.4	6	75.8	18	61	1	0.42	8	0
2013	65.5	25	73.8	30	57.2	18	0.23	18	0
2012	60.6	81	68.3	82	52.9	71	0.00	74	0
2011	64.7	33	73.7	32	55.6	32	0.01	47	0
2010	68.5	5	78.2	6	58.9	7	0.01	47	0
2009	66.2	19	75.5	19	56.9	20	0.27	13	0
2008	65	29	74.3	27	55.6	32	0.00	74	0
2007	64.3	34	72	57	56.5	22	0.15	22	0
2006	62.3	70	70.8	71	53.9	56	0.00	74	0
2005	62.3	70	70.4	74	54.3	51	0.08	29	0
2004	67.3	12	77.2	9	57.5	15	0.04	38	0
2003	66.9	15	76	17	57.8	11	trace	52	0
2002	64.8	31	74	28	55.5	35	0.00	74	0
2001	62.9	59	70.5	73	55.2	41	0.11	23	0
2000	66.2	19	75.4	20	57	19	0.07	31	0
1999	63.6	47	72.4	49	54.7	45	0.27	13	0
1998	64.3	34	72.1	56	56.5	22	0.09	27	0
1997	68.3	7	76.9	12	59.6	4	trace	52	0
1996	63	57	72.4	49	53.6	65	trace	52	0
1995	63.2	51	71.7	61	54.7	45	trace	52	0
1994	64.1	40	72.4	49	55.8	30	0.10	26	0
1993	63.1	54	72.2	55	53.9	56	trace	52	0
1992	65.3	28	75.1	23	55.4	37	trace	52	0
1991	62.9	59	71.3	69	54.5	49	0.04	38	0
1990	66.4	16	75.2	22	57.5	15	0.20	20	0
1989	61.4	76	69.8	79	53	69	1.24	2	0
1988	63.1	54	73.6	34	52.6	73	0.03	41	0
1987	64	41	72.3	54	55.6	32	trace	52	0
1986	62.9	59	71.4	67	54.4	50	0.47	6	0
1985	63.1	54	71.5	66	54.8	43	0.18	21	0
1984	69.7	2	83.1	1	56.3	26	0.05	35	0
1983	68.2	8	78.8	4	57.7	12	0.57	5	0
1982	64	41	73.4	38	54.6	48	0.96	4	0
1981	62.7	63	71.6	63	53.8	59	0.28	12	0
1980	63.2	51	72.7	46	53.7	60	trace	52	0
1979	67.3	12	77.7	7	56.8	21	trace	52	0
1978	65.7	24	76.1	16	55.4	37	0.26	16	0
1977	63.5	48	71.6	63	55.4	37	0.47	6	0
1976	63.2	51	70.6	72	55.9	29	0.30	10	0
1975	61.4	76	69.9	77	52.9	71	trace	52	0
1974	62.4	69	71.2	70	53.7	60	trace	52	0
1973	63.5	48	72	57	54.9	42	0.04	38	0
1972	62.5	66	71.4	67	53.7	60	0.30	10	0
1971	66.1	21	76.5	13	55.8	30	0.11	23	0
1970	65.4	27	77.5	8	53.3	67	trace	52	0
1969	63.9	44	72.9	43	54.8	43	0.02	44	0
1968	64.2	37	73.6	34	54.7	45	trace	52	0
1967	66.4	16	75.1	23	57.6	14	0.01	47	0
1966	64	41	73.8	30	54.2	52	0.08	29	0
1965	61	79	70.2	76	51.9	78	trace	52	0
1964	63.5	48	73.2	41	53.7	60	trace	52	0
1963	66.3	18	76.2	15	56.4	24	0.07	31	0
1962	61	79	69.4	80	52.5	75	0.09	27	0
1961	64.2	37	75.3	21	53	69	0.41	9	0
1960	62.5	66	72.4	49	52.5	75	trace	52	0
1959	64.3	34	73.1	42	55.4	37	2.30	1	0
1958	69.5	3	81.4	2	57.5	15	0.05	35	0
1957	65.5	25	74.8	25	56.3	26	1.06	3	0
1956	63.8	45	73.9	29	53.7	60	0.26	16	0
1955	61.3	78	72	57	50.5	82	trace	52	0
1954	61.9	74	72.4	49	51.3	80	trace	52	0
1953	64.2	37	72.9	43	55.5	35	trace	52	0
1952	62.8	62	72.6	48	53.1	68	trace	52	0
1951	62.1	72	69.9	77	54.2	52	trace	52	0
1950	63.8	45	73.7	32	54	55	0.11	23	0
1949	62.7	63	71.8	60	53.6	65	0.02	44	0
1948	60.1	82	69.1	81	51	81	0.05	35	0
1947	61.6	75	71.6	63	51.6	79	trace	52	1
1946	62.7	63	72.8	45	52.6	73	0.01	47	1
1945	62.5	66	72.7	46	52.2	77	0.03	41	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
2017	69.8
1984	69.7
1958	69.5
2020	68.7
2010	68.5
2014	68.4
1997	68.3
2022	68.2
1983	68.2
2019	68.1

Coldest
Year	Mean, °F
1948	60.1
2012	60.6
1965	61
1962	61
1955	61.3
1989	61.4
1975	61.4
1947	61.6
1954	61.9
2018	62.1
More years share the last value

Wettest
Year	Precipitation, in
1959	2.30
1989	1.24
1957	1.06
1982	0.96
1983	0.57
1986	0.47
1977	0.47
2014	0.42
1961	0.41
1976	0.30
More years share the last value

Driest
Year	Precipitation, in
2024	0.00
2021	0.00
2020	0.00
2018	0.00
2016	0.00
2012	0.00
2008	0.00
2006	0.00
2002	0.00
2003	trace
More years share the last value

The hottest, coldest and wettest days

Hottest day: 94°F; 9 September 2026
Coldest night: 55°F; 29 September 2026, 23 September 2026
Wettest day: 0.01 in; 3 September 2026

Every month, season and year

Months

Seasons

Years

San Francisco Airport, CA the day's answers

All-time records

Every answer in words

September 2026 brought 0.01 in of precipitation in San Francisco Airport, CA, the driest September since 2024, tied 32nd driest of 82 (with 2011, 2010, 1967 and 1 other year).
The hottest day of September 2026 in San Francisco Airport, CA: 94°F on Wednesday 9 September 2026.
The coldest night of September 2026 in San Francisco Airport, CA: a low of 55°F on Tuesday 29 September 2026 and Wednesday 23 September 2026.
The wettest day of September 2026 in San Francisco Airport, CA: 0.01 in on Thursday 3 September 2026.