Eureka, CA: September

30 September 2026: September 2026 averaged 58.6°F in Eureka, CA (1 day missing), the warmest September since 2025, tied 21st warmest of 140 (with 2023 and 1982).

September 2026

Mean temperature: 58.6°F; Warmest since 2025; 21st warmest of 140
Precipitation: 0.64 in; Wettest since 2025; 66th wettest of 140

A normal September in Eureka, CA (1991 to 2020): a mean temperature of 57.3°F, between 55.1°F and 60.2°F in eight years of ten and 0.34 in of precipitation, between 0.04 in and 1.93 in in eight years of ten.

The mean temperature of every September in Eureka, CA since 1887: 58.6°F in 2026; the highest is 62.2°F, in 1997 and 1979.

Normal range, 55.1 to 60.2°F

Every year, ranked, as a table

Every September in Eureka, CA from 1887 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	58.6	21	64.8	26	52.5	20	0.64	66	1
2025	60	10	65.7	13	54.2	5	1.71	20	0
2024	57.4	41	64	30	50.7	77	0.07	116	0
2023	58.6	21	65.1	22	52.2	30	1.83	17	0
2022	58.8	19	65.4	17	52.1	31	0.43	83	0
2021	56.2	78	63	49	49.4	112	1.24	34	0
2020	60.7	4	68.1	3	53.2	13	0.74	58	0
2019	60.6	6	67.3	6	53.9	7	1.92	15	0
2018	56.7	62	63.4	40	49.9	100	0.19	105	0
2017	60.2	7	67.4	5	53.1	16	1.01	45	0
2016	56.9	58	63.2	44	50.6	82	0.01	131	0
2015	58.1	26	64.9	24	51.2	58	0.27	101	0
2014	59.5	13	66.1	11	53	17	3.09	6	0
2013	60.2	7	67.2	7	53.2	13	3.14	4	0
2012	53.6	135	59.2	130	48	139	0.04	125	0
2011	56.9	58	63.5	39	50.3	94	0.37	88	0
2010	57.3	45	63.7	34	50.8	70	1.39	29	0
2009	59.5	13	67	8	52	34	1.03	44	0
2008	55.1	115	61.7	78	48.6	134	0.05	122	0
2007	57	56	64.2	29	49.8	103	0.60	71	0
2006	55.2	108	61.5	86	49	128	0.09	113	0
2005	55	120	60.8	104	49.3	116	0.08	114	0
2004	58.1	26	65.6	15	50.5	86	0.68	63	0
2003	58	29	65.2	20	50.8	70	0.35	91	0
2002	57.3	45	64.7	27	49.8	103	0.06	118	0
2001	56.2	78	62.8	56	49.5	111	0.28	99	0
2000	58.7	20	66.1	11	51.3	53	0.55	75	0
1999	54.9	122	61.3	93	48.5	136	0.05	122	0
1998	57.4	41	63.4	40	51.3	53	0.08	114	0
1997	62.2	1	69.4	1	55	3	2.05	14	0
1996	55.8	90	62.6	61	49	128	1.21	35	0
1995	60.2	7	66.8	10	53.7	8	0.69	62	0
1994	59.6	12	65.4	17	53.7	8	0.06	118	0
1993	55.8	90	61.1	95	50.5	86	0.03	128	0
1992	57.5	39	63.9	31	51	63	0.33	93	0
1991	57.2	48	63.2	44	51.2	58	trace	137	0
1990	61.6	3	66.9	9	56.2	1	0.19	105	0
1989	56.6	67	61.8	77	51.4	48	0.85	53	0
1988	55.7	94	62.5	64	49	128	0.12	111	0
1987	57.3	45	62.3	69	52.3	26	0.02	129	0
1986	57.2	48	63.6	37	50.7	77	2.70	8	0
1985	56.7	62	62.7	60	50.7	77	1.06	41	0
1984	58.3	24	65.6	15	51	63	0.55	75	0
1983	60.7	4	67.9	4	53.5	12	0.87	50	0
1982	58.6	21	65.7	13	51.6	44	0.62	68	0
1981	57.9	30	63.7	34	52.1	31	0.97	47	0
1980	56.6	67	62.4	67	50.8	70	0.14	109	0
1979	62.2	1	68.3	2	56.2	1	1.15	37	0
1978	57.6	36	63.6	37	51.5	47	2.72	7	0
1977	57.1	52	62.5	64	51.6	44	3.35	3	0
1976	56.2	78	61.5	86	50.8	70	0.04	125	0
1975	55.2	108	59.6	127	50.8	70	0.01	131	0
1974	55.6	95	60	120	51.2	58	trace	137	0
1973	57.1	52	62.8	56	51.4	48	2.35	12	0
1972	55.8	90	61.1	95	50.5	86	1.06	41	0
1971	56.7	62	62	73	51.4	48	2.08	13	0
1970	55.6	95	62	73	49.3	116	0.32	95	0
1969	56.5	70	62.2	72	50.8	70	0.36	90	0
1968	57.4	41	62.9	53	52	34	0.60	71	0
1967	59.1	17	65	23	53.2	13	1.32	33	0
1966	57.9	30	63.8	32	52.1	31	1.33	32	0
1965	53.9	133	58.4	137	49.4	112	trace	137	0
1964	55.2	108	61	99	49.4	112	0.07	116	0
1963	59.4	15	64.5	28	54.2	5	0.68	63	0
1962	57.1	52	61.7	78	52.5	20	0.71	60	0
1961	55.3	107	60.8	104	49.8	103	0.53	78	0
1960	53.6	135	57.9	138	49.3	116	0.01	131	0
1959	57.8	32	63.1	47	52.4	24	1.54	23	0
1958	59.1	17	65.4	17	52.8	18	0.78	56	0
1957	59.3	16	64.9	24	53.7	8	1.37	30	0
1956	56.4	75	62.3	69	50.4	90	0.33	93	0
1955	54.8	125	60.3	112	49.2	121	1.18	36	0
1954	57.5	39	63	49	52	34	0.87	50	0
1953	58.2	25	62.8	56	53.6	11	0.61	69	0
1952	55.6	95	60.5	111	50.6	82	0.73	59	0
1951	55.1	115	59	132	51.1	62	0.79	54	0
1950	55.5	101	60.2	114	50.7	77	0.35	91	0
1949	56.5	70	61.7	78	51.4	48	0.50	79	0
1948	55.2	108	60.8	104	49.6	109	1.71	20	0
1947	57.6	36	63.3	42	51.9	39	0.59	73	0
1946	56.5	70	62.9	53	50.1	99	0.32	95	0
1945	55.1	115	61	99	49.1	124	1.09	40	0
1944	54.6	128	58.9	133	50.2	96	0.19	105	0
1943	57.7	33	63	49	52.3	26	0.01	131	0
1942	55.5	101	60.2	114	50.8	70	0.06	118	0
1941	57.6	36	63.2	44	52	34	0.48	80	0
1940	59.8	11	65.2	20	54.3	4	0.91	48	0
1939	57.7	33	63.3	42	52	34	0.05	122	0
1938	57	56	61.7	78	52.3	26	1.74	19	0
1937	56.5	70	61.6	83	51.3	53	0.19	105	0
1936	56	85	62.3	69	49.7	106	0.04	125	0
1935	54.8	125	58.6	135	50.9	68	1.10	39	0
1934	54.7	127	60.2	114	49.2	121	0.47	82	0
1933	55.4	106	60.8	104	49.9	100	0.70	61	0
1932	54.5	130	59.3	128	49.6	109	0.01	131	0
1931	55.6	95	60.6	109	50.6	82	0.54	77	0
1930	56.9	58	61.1	95	52.6	19	1.12	38	0
1929	55.6	95	61	99	50.2	96	0.00	140	0
1928	55.2	108	60.1	118	50.3	94	0.58	74	2
1927	58.1	26	63.7	34	52.5	20	0.86	52	0
1926	55.5	101	61.2	94	49.7	106	0.43	83	0
1925	57.7	33	63	49	52.5	20	3.56	2	0
1924	54.9	122	61.1	95	48.7	132	0.41	85	0
1923	57.2	48	62.4	67	51.9	39	1.54	23	0
1922	56.1	81	61.4	90	50.7	77	0.37	88	0
1921	55.5	101	61.6	83	49.3	116	0.27	101	0
1920	57.2	48	62.6	61	51.7	43	2.47	9	0
1919	56.5	70	62	73	51	63	1.52	25	0
1918	56.6	67	60.8	104	52.3	26	1.42	28	0
1917	56.4	75	61.7	78	51	63	0.66	65	0
1916	55.8	90	61.4	90	50.2	96	0.38	86	0
1915	54.5	130	59.9	122	49.1	124	0.11	112	0
1914	55.1	115	60.2	114	49.9	100	1.82	18	0
1913	56.3	77	62.8	56	49.7	106	0.48	80	0
1912	57.1	52	62.9	53	51.4	48	2.40	10	0
1911	55	120	60.6	109	49.4	112	0.29	98	0
1910	53.1	140	57.5	139	48.7	132	0.01	131	0
1909	53.6	135	58.6	135	48.6	134	0.61	69	0
1908	54.2	132	59.8	123	48.5	136	0.02	129	0
1907	55.9	89	60.1	118	51.6	44	0.63	67	0
1906	56.1	81	61	99	51.2	58	0.76	57	0
1905	56.9	58	61.5	86	52.4	24	0.38	86	0
1904	54.6	128	58.9	133	50.4	90	1.36	31	0
1903	55.2	108	59.8	123	50.6	82	0.28	99	0
1902	55.1	115	59.7	125	50.4	90	0.14	109	0
1901	55.5	101	59.7	125	51.3	53	4.26	1	0
1900	56.7	62	61.6	83	51.8	41	0.21	103	0
1899	54.9	122	59.2	130	50.5	86	0.88	49	0
1898	56.1	81	60.3	112	51.8	41	1.48	26	0
1897	55.2	108	61.4	90	49.1	124	1.05	43	0
1896	55.6	95	62	73	49.2	121	1.60	22	0
1895	53.6	135	60	120	47.2	140	3.14	4	0
1894	56	85	62.6	61	49.3	116	1.84	16	0
1893	56	85	61.5	86	50.4	90	2.39	11	0
1892	56.1	81	61	99	51.3	53	0.99	46	0
1891	56.7	62	62.5	64	50.9	68	1.45	27	0
1890	53.2	139	57.3	140	49.1	124	0.79	54	0
1889	56	85	63.1	47	48.8	131	0.32	95	0
1888	57.4	41	63.8	32	51	63	0.06	118	0
1887	53.9	133	59.3	128	48.5	136	0.21	103	0

Warmest, coldest, wettest and driest

Warmest
Year	Mean, °F
1997	62.2
1979	62.2
1990	61.6
2020	60.7
1983	60.7
2019	60.6
2017	60.2
2013	60.2
1995	60.2
2025	60

Coldest
Year	Mean, °F
1910	53.1
1890	53.2
2012	53.6
1960	53.6
1909	53.6
1895	53.6
1965	53.9
1887	53.9
1908	54.2
1932	54.5
More years share the last value

Wettest
Year	Precipitation, in
1901	4.26
1925	3.56
1977	3.35
2013	3.14
1895	3.14
2014	3.09
1978	2.72
1986	2.70
1920	2.47
1912	2.40

Driest
Year	Precipitation, in
1929	0.00
1991	trace
1974	trace
1965	trace
2016	0.01
1975	0.01
1960	0.01
1943	0.01
1932	0.01
1910	0.01

The hottest, coldest and wettest days

Hottest day: 74°F; 9 September 2026
Coldest night: 48°F; 29 September 2026
Wettest day: 0.33 in; 2 September 2026

Every month, season and year

Months

Seasons

Years

Eureka, CA the day's answers

All-time records

Every answer in words

September 2026 brought 0.64 in of precipitation in Eureka, CA (1 day missing), the wettest September since 2025, 66th wettest of 140.
The hottest day of September 2026 in Eureka, CA: 74°F on Wednesday 9 September 2026.
The coldest night of September 2026 in Eureka, CA: a low of 48°F on Tuesday 29 September 2026.
The wettest day of September 2026 in Eureka, CA: 0.33 in on Wednesday 2 September 2026.