Seattle City, WA: September

30 September 2026: September 2026 averaged 61.6°F in Seattle City, WA, the warmest September since 2025, 47th warmest of 132.

September 2026

Mean temperature: 61.6°F; Warmest since 2025; 47th warmest of 132
Precipitation: 1.57 in; Wettest since 2023; 65th wettest of 132

A normal September in Seattle City, WA (1991 to 2020): a mean temperature of 62.3°F, between 60.1°F and 64.8°F in eight years of ten and 1.59 in of precipitation, between 0.39 in and 3.87 in in eight years of ten.

The mean temperature of every September in Seattle City, WA since 1894: 61.6°F in 2026; the highest is 66.3°F, in 1967.

Normal range, 60.1 to 64.8°F

Every year, ranked, as a table

Every September in Seattle City, WA from 1894 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	61.6	47	70	46	53.1	51	1.57	65	0
2025	65.4	3	75.1	3	55.6	9	0.97	95	0
2024	63.8	14	72.7	15	54.9	21	1.02	92	0
2023	62.1	40	71.1	36	53.1	51	3.69	7	0
2022	65.4	3	75.2	2	55.6	9	0.13	125	0
2021	62.5	31	71.6	28	53.5	39	2.97	20	0
2020	65.4	3	74.2	10	56.6	2	4.16	4	0
2019	62.3	32	69.2	60	55.4	13	3.86	6	0
2018	62.3	32	71.3	32	53.4	44	1.41	76	0
2017	64.9	7	74.7	7	55	17	1.10	89	0
2016	61.4	50	70.4	41	52.4	76	1.53	68	0
2015	60.4	77	68.8	68	52	92	1.11	88	0
2014	64.7	10	73.6	11	55.8	8	3.01	19	0
2013	63.2	19	70.4	41	55.9	7	5.01	3	0
2012	62.8	25	73.3	12	52.4	76	0.24	118	0
2011	64.6	11	74.5	8	54.6	24	0.91	97	0
2010	62.3	32	69.1	61	55.5	12	3.90	5	0
2009	62.6	28	72.2	20	53	54	2.35	34	0
2008	60.9	65	69.6	53	52.1	86	0.79	99	0
2007	60.6	72	68.6	69	52.6	70	2.00	49	0
2006	62.3	32	72.8	14	51.7	98	1.81	55	0
2005	59.9	85	69	64	50.8	117	1.67	60	0
2004	60.1	81	67.4	83	52.8	66	1.94	50	0
2003	63.1	22	72.7	15	53.5	39	1.62	63	0
2002	61.2	55	71.6	28	50.8	117	0.65	105	0
2001	61	59	69.5	54	52.4	76	0.43	116	0
2000	61.3	51	70.4	41	52.2	81	1.59	64	0
1999	61.1	56	71.7	26	50.4	124	0.60	109	0
1997	63.7	15	72.3	19	55	17	2.97	20	0
1996	60.1	81	68.4	74	51.8	97	2.30	37	0
1995	64.8	8	74.4	9	55.1	15	1.27	83	0
1994	65.2	6	74.8	5	55.4	13	0.97	95	1
1993	62.7	26	73.3	12	52.1	86	trace	132	0
1992	58.8	108	67.5	81	50.2	126	2.43	31	0
1991	62.1	40	72	22	52.5	74	0.07	129	2
1990	63	23	71.2	34	54.8	22	0.03	130	0
1989	62.6	28	71.9	23	53.2	48	0.15	124	0
1988	60.3	78	68.5	72	52.1	86	1.87	51	0
1987	62.1	40	71.1	36	53.1	51	0.52	114	0
1986	60.8	67	67.8	78	53.8	36	2.03	43	0
1985	58.8	108	66.3	103	51.2	111	1.77	57	0
1984	60.3	78	68.4	74	52.2	81	1.51	70	0
1983	59.2	101	66.7	96	51.7	98	2.55	29	0
1982	61.3	51	69	64	53.6	38	1.68	59	0
1981	62.2	38	70.4	41	53.9	34	3.25	13	0
1980	61.5	48	69.4	56	53.5	39	1.43	72	0
1979	63.2	19	70.8	38	55.6	9	1.86	52	0
1978	59	104	64.7	121	53.3	45	5.62	1	0
1977	58.6	114	65.6	111	51.6	102	2.82	25	0
1976	61.7	46	68.9	66	54.5	25	1.43	72	0
1975	62.3	32	71.6	28	52.9	61	0.03	130	0
1974	64.8	8	75	4	54.5	25	0.23	120	0
1973	61.3	51	69.8	49	52.9	61	1.56	67	0
1972	57.8	121	64.4	123	51.2	111	3.27	11	0
1971	60.6	72	68.1	77	53	54	3.08	15	0
1970	59.9	85	67	93	52.9	61	2.01	47	0
1969	61	59	67.4	83	54.7	23	5.41	2	0
1968	61.3	51	67.4	83	55.1	15	1.63	62	0
1967	66.3	1	75.8	1	56.9	1	1.21	85	0
1966	63.6	16	70.7	40	56.6	2	1.57	65	0
1965	59.7	89	66.6	98	52.8	66	0.75	100	0
1964	60.6	72	67.3	86	53.9	34	2.01	47	0
1963	64.5	12	72.4	17	56.5	4	0.69	104	0
1962	62.1	40	69.9	47	54.4	27	2.02	46	0
1961	60.9	65	68.9	66	52.9	61	0.62	108	0
1960	60.1	81	67.3	86	53	54	0.99	94	0
1959	59.3	99	65.1	116	53.5	39	2.33	36	0
1958	62.2	38	69.3	58	55	17	1.47	71	0
1957	65.6	2	74.8	5	56.4	5	0.60	109	0
1956	60.2	80	67.1	91	53.2	48	2.22	39	0
1955	59.9	85	67.3	86	52.4	76	1.24	84	0
1954	60.5	75	66.8	95	54.3	29	1.66	61	0
1953	62.1	40	69.9	47	54.3	29	2.85	24	0
1952	63.2	19	72.2	20	54.2	32	0.24	118	0
1951	61.9	45	70.8	38	53	54	2.03	43	0
1950	61	59	69.8	49	52.2	81	1.43	72	0
1949	62.6	28	71.3	32	53.8	36	1.30	80	0
1948	59.6	90	67.5	81	51.7	98	3.07	16	0
1947	61.1	56	69.1	61	53	54	0.81	98	0
1946	60.7	71	68.6	69	52.7	68	1.36	79	0
1945	59.4	96	67.2	90	51.6	102	3.46	8	0
1944	63	23	71.7	26	54.4	27	0.65	105	0
1943	63.4	17	72.4	17	54.3	29	0.12	126	0
1942	61.5	48	69.7	51	53.2	48	0.27	117	0
1941	58.9	105	64.8	119	53	54	3.03	17	0
1940	64	13	71.8	25	56.1	6	2.58	28	0
1939	61.1	56	69.4	56	52.7	68	1.30	80	0
1938	63.4	17	71.9	23	55	17	0.48	115	0
1937	61	59	68.5	72	53.5	39	2.42	32	0
1936	59.6	90	67.7	79	51.4	107	1.40	77	0
1935	62.7	26	71.4	31	54	33	1.86	52	0
1934	59.5	93	66.4	101	52.6	70	2.22	39	0
1933	57.6	124	64.3	125	50.8	117	3.02	18	0
1932	60.5	75	69.3	58	51.7	98	0.23	120	0
1931	59.3	99	65.2	115	53.3	45	2.97	20	0
1930	59.4	96	66.1	105	52.6	70	1.14	87	0
1929	60.8	67	69.5	54	52.1	86	0.09	127	0
1928	58.4	116	65.3	113	51.6	102	0.53	113	0
1927	58.7	112	64.9	118	52.5	74	2.73	26	0
1926	57.9	119	65.4	112	50.5	123	0.60	109	0
1925	59.5	93	66.4	101	52.6	70	0.59	112	0
1924	59.5	93	67.7	79	51.3	110	2.68	27	0
1923	60.8	67	68.6	69	53	54	1.37	78	0
1922	59.8	88	67.3	86	52.2	81	1.19	86	0
1921	57	128	63.8	129	50.2	126	1.84	54	0
1920	57.7	122	64	126	51.5	106	2.34	35	0
1919	59.6	90	67.1	91	52.1	86	2.03	43	0
1918	62.3	32	71.2	34	53.3	45	0.08	128	0
1917	58.9	105	65.8	107	52	92	1.29	82	0
1916	58.8	108	66.7	96	50.8	117	0.70	103	0
1915	59.1	103	66.1	105	52.1	86	0.65	105	0
1914	56.7	130	62.8	132	50.6	122	1.42	75	0
1913	58.8	108	66.5	99	51.1	114	2.37	33	0
1912	59.2	101	66.9	94	51.4	107	0.73	101	0
1911	57.1	126	63.4	130	50.8	117	3.27	11	0
1910	57.9	119	64.8	119	51.1	114	1.04	91	0
1909	60.1	81	68.3	76	51.9	95	1.10	89	0
1908	57.1	126	65	117	49.2	130	0.23	120	0
1907	58.7	112	65.3	113	52	92	3.39	9	0
1906	58.9	105	66.2	104	51.6	102	3.31	10	0
1905	59.4	96	65.8	107	52.9	61	1.70	58	0
1904	61	59	70.1	45	51.9	95	0.22	123	0
1903	57.7	122	64.4	123	51	116	3.18	14	0
1902	58.4	116	66.5	99	50.3	125	2.15	41	0
1901	58	118	65.8	107	50.2	126	2.30	37	0
1900	58.6	114	65.8	107	51.4	107	0.72	102	0
1899	61	59	69.7	51	52.2	81	1.52	69	0
1898	60.8	67	69.1	61	52.4	76	2.92	23	0
1897	56.9	129	63.9	128	50	129	2.04	42	0
1896	56.7	130	64.5	122	48.9	131	1.78	56	0
1895	55.8	132	63	131	48.6	132	1.01	93	0
1894	57.6	124	64	126	51.2	111	2.50	30	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1967	66.3
1957	65.6
2025	65.4
2022	65.4
2020	65.4
1994	65.2
2017	64.9
1995	64.8
1974	64.8
2014	64.7

Coldest
Year	Mean, °F
1895	55.8
1914	56.7
1896	56.7
1897	56.9
1921	57
1911	57.1
1908	57.1
1933	57.6
1894	57.6
1920	57.7
More years share the last value

Wettest
Year	Precipitation, in
1978	5.62
1969	5.41
2013	5.01
2020	4.16
2010	3.90
2019	3.86
2023	3.69
1945	3.46
1907	3.39
1906	3.31

Driest
Year	Precipitation, in
1993	trace
1990	0.03
1975	0.03
1991	0.07
1918	0.08
1929	0.09
1943	0.12
2022	0.13
1989	0.15
1904	0.22

The hottest, coldest and wettest days

Hottest day: 81°F; 9 September 2026
Coldest night: 44°F; 28 September 2026
Wettest day: 0.53 in; 13 September 2026

Every month, season and year

Months

Seasons

Years

Seattle City, WA the day's answers

All-time records

Every answer in words

September 2026 brought 1.57 in of precipitation in Seattle City, WA, the wettest September since 2023, tied 65th wettest of 132 (with 1966).
The hottest day of September 2026 in Seattle City, WA: 81°F on Wednesday 9 September 2026.
The coldest night of September 2026 in Seattle City, WA: a low of 44°F on Monday 28 September 2026.
The wettest day of September 2026 in Seattle City, WA: 0.53 in on Sunday 13 September 2026.