Eureka, CA

4 October 2026: 2026 so far averaged 54.4°F in Eureka, CA (1 day missing), the warmest 1 January to 4 October since 2016, 21st warmest of 140.

Sunday 4 October 2026

High: 57°F; Coldest since 2021; 17th coldest of 140
Low: 50°F; Warmest since 2025; 52nd warmest of 140

No measurable precipitation in Eureka, CA for 1 day to Sunday 4 October 2026.

Every 4 October high in Eureka, CA since 1887: 57°F in 2026; the highest is 82°F, in 1917.

Normal range, 57.8 to 70.3°F

Every year as a table

Every 4 October low in Eureka, CA since 1887: 50°F in 2026; the lowest is 41°F, in 2009 and 1916.

Year	High, °F	Low, °F
2026	57	50
2025	63	52
2024	64	45
2023	70	50
2022	62	55
2021	57	49
2020	58	54
2019	63	46
2018	62	47
2017	65	42
2016	64	53
2015	76	44
2014	75	50
2013	69	42
2012	58	48
2011	58	48
2010	62	53
2009	59	41
2008	64	53
2007	59	45
2006	56	50
2005	59	42
2004	59	53
2003	61	51
2002	56	50
2001	64	51
2000	62	44
1999	70	51
1998	62	48
1997	67	55
1996	73	50
1995	63	43
1994	62	48
1993	56	51
1992	63	49
1991	70	52
1990	64	53
1989	60	48
1988	61	54
1987	65	51
1986	68	47
1985	81	52
1984	61	51
1983	66	50
1982	67	44
1981	59	45
1980	65	49
1979	59	53
1978	55	50
1977	57	47
1976	59	45
1975	65	53
1974	58	44
1973	57	44
1972	58	52
1971	61	49
1970	55	49
1969	65	44
1968	59	51
1967	69	51
1966	57	51
1965	68	49
1964	58	50
1963	62	54
1962	58	49
1961	53	47
1960	64	51
1959	58	46
1958	53	49
1957	59	49
1956	59	47
1955	61	48
1954	59	49
1953	77	49
1952	67	51
1951	62	46
1950	71	56
1949	62	46
1948	63	50
1947	59	53
1946	59	48
1945	58	47
1944	67	50
1943	64	52
1942	59	51
1941	57	52
1940	62	52
1939	63	50
1938	61	50
1937	60	48
1936	60	47
1935	56	53
1934	56	44
1933	60	50
1932	52	49
1931	59	46
1930	59	51
1929	62	46
1928	65	56
1927	59	45
1926	73	50
1925	63	50
1924	57	45
1923	59	53
1922	64	52
1921	52	49
1920	67	54
1919	68	43
1918	65	50
1917	82	58
1916	56	41
1915	67	46
1914	60	44
1913	54	48
1912	54	50
1911	58	44
1910	62	44
1909	56	51
1908	60	44
1907	70	51
1906	59	46
1905	68	54
1904	61	50
1903	61	56
1902	59	46
1901	62	52
1900	60	54
1899	74	52
1898	60	44
1897	70	46
1896	60	45
1895	76	45
1894	62	50
1893	59	51
1892	61	51
1891	65	48
1890	59	43
1889	67	46
1888	56	53
1887	58	52

The forecast

Date	High	Low
6 October	62°FRecord 80°F, 2013, 1992	50°FRecord 40°F, 2007, 1915
7 October	Record 76°F, 1992, 1969	Record 41°F, 2009, 1970, 1955

The month and the year

Every year's 1 to 4 October in Eureka, CA, ranked by its mean temperature: October 2026 so far is the tied 79th warmest of 140.

Every year, ranked, as a table

Rank	Year	Mean, °F
1	1952	62.3
2	2014	61
3	2008	60.8
4	1917	60.6
5	1997	60.4
5	1920	60.4
7	1980	59.5
8	2025	59.3
8	1967	59.3
8	1923	59.3
11	1926	59.1
12	2001	59
13	1905	58.9
14	1938	58.8
15	1951	58.5
15	1947	58.5
17	2022	58.4
17	1991	58.4
19	1990	58.3
19	1985	58.3
21	1983	58
21	1979	58
21	1963	58
24	1965	57.9
24	1948	57.9
26	2018	57.6
26	2016	57.6
26	2011	57.6
26	1984	57.6
26	1899	57.6
31	1943	57.5
32	2010	57.4
32	1992	57.4
32	1988	57.4
32	1975	57.4
32	1889	57.4
37	1996	57.1
38	2015	57
38	1994	57
38	1901	57
41	2020	56.9
42	1987	56.8
43	1887	56.6
44	1953	56.5
44	1918	56.5
46	1950	56.4
46	1922	56.4
46	1894	56.4
49	2012	56.3
50	1935	56.1
50	1888	56.1
52	1982	56
52	1937	56
54	1928	55.9
54	1906	55.9
54	1903	55.9
54	1900	55.9
58	1998	55.8
58	1995	55.8
58	1957	55.8
58	1940	55.8
58	1925	55.8
63	1989	55.6
63	1907	55.6
65	1962	55.5
65	1944	55.5
65	1927	55.5
68	2023	55.4
68	2004	55.4
68	1966	55.4
68	1964	55.4
72	1986	55.3
72	1959	55.3
72	1904	55.3
75	2024	55.1
75	2000	55.1
75	1958	55.1
75	1902	55.1
79	2026	55
79	1969	55
79	1915	55
79	1892	55
83	1942	54.9
83	1933	54.9
83	1896	54.9
86	2021	54.8
86	1941	54.8
88	1976	54.5
89	1939	54.4
90	2003	54.3
90	1981	54.3
92	2013	54.1
93	2007	54
93	1961	54
93	1919	54
96	1978	53.8
96	1972	53.8
96	1956	53.8
96	1910	53.8
100	2005	53.6
100	1960	53.6
100	1946	53.6
103	1929	53.5
103	1897	53.5
103	1895	53.5
106	2017	53.4
106	1909	53.4
108	1999	53.3
108	1924	53.3
110	1977	53
110	1971	53
110	1968	53
110	1914	53
114	2006	52.9
114	1934	52.9
114	1930	52.9
117	1949	52.8
118	1913	52.6
119	1912	52.5
120	2009	52.4
120	1974	52.4
120	1955	52.4
120	1931	52.4
124	2019	52.3
124	1993	52.3
124	1898	52.3
124	1893	52.3
124	1891	52.3
129	1970	51.9
129	1921	51.9
131	2002	51.8
131	1973	51.8
131	1936	51.8
134	1890	51.6
135	1911	51.5
136	1932	51.3
137	1945	51
138	1908	50.6
139	1954	50.4
140	1916	49.4

Every day as a table

Daily highs and lows in Eureka, CA, 1 to 4 October 2026, with each date's record range and its 1991 to 2020 normal range.

Day	High, °F	Low, °F	Record high	Year	Record low	Year	Normal high	Normal low
1 October 2026	61	52	77	1902	40	1893	62.5	50.5
2 October 2026	61	50	80	1980	40	2019	62	49
3 October 2026	58	51	80	2014	40	1890	62	48
4 October 2026	57	50	82	1917	41	2009	62	49.5

The warmest, coldest and wettest on this date

The 20 warmest 4 October highs in Eureka, CA since 1887.
Rank	Year	High, °F
1	1917	82
2	1985	81
3	1953	77
4	2015	76
4	1895	76
6	2014	75
7	1899	74
8	1996	73
8	1926	73
10	1950	71
11	2023	70
11	1999	70
11	1991	70
11	1907	70
11	1897	70
16	2013	69
16	1967	69
18	1986	68
18	1965	68
18	1919	68

The 20 coldest 4 October lows in Eureka, CA since 1887.
Rank	Year	Low, °F
1	2009	41
1	1916	41
3	2017	42
3	2013	42
3	2005	42
6	1995	43
6	1919	43
6	1890	43
9	2015	44
9	2000	44
9	1982	44
9	1974	44
9	1973	44
9	1969	44
9	1934	44
9	1914	44
9	1911	44
9	1910	44
9	1908	44
9	1898	44

The 20 wettest 4 October days in Eureka, CA since 1887.
Rank	Year	Precipitation, in
1	2011	1.07
2	1900	0.91
3	1903	0.76
4	1967	0.33
5	2007	0.32
5	1988	0.32
7	1984	0.31
8	1949	0.26
9	1957	0.25
10	1948	0.23
11	2006	0.22
12	1965	0.16
13	1968	0.10
14	1918	0.06
14	1893	0.06
16	2008	0.03
16	1924	0.03
18	1997	0.02
18	1955	0.02
18	1940	0.02

Every answer in words

Sunday 4 October 2026: a high of 57°F in Eureka, CA, the coldest 4 October day since 2021, tied 17th coldest of 140 (with 2021, 1977, 1973 and 3 other years).
Sunday 4 October 2026: a low of 50°F in Eureka, CA, the warmest 4 October night since 2025, tied 52nd warmest of 140 (with 2023, 2014, 2006 and 16 other years).
Forecast for Tuesday 6 October 2026: a high of 62°F in Eureka, CA, which would be the warmest 6 October since 2025, tied 54th warmest of 140 (with 2016, 2012, 2010 and 12 other years) (National Weather Service forecast).
Forecast for Tuesday 6 October 2026: a low of 50°F in Eureka, CA, which would be the warmest 6 October night since 2023, tied 56th warmest of 140 (with 2020, 1996, 1989 and 8 other years) (National Weather Service forecast).
Eureka, CA on 6 October: record high 80°F (2013 and 1992), record low 40°F (2007 and 1915).
Eureka, CA on 7 October: record high 76°F (1992 and 1969), record low 41°F (2009, 1970 and 1955).
October 2026 so far averaged 55°F in Eureka, CA, the coldest 1 to 4 October since 2021, tied 59th coldest of 140 (with 1969, 1915 and 1892).
October 2026 so far brought 0.01 in of precipitation in Eureka, CA, the driest 1 to 4 October since 2024, tied 63rd driest of 140 (with 2010, 2002, 2001 and 8 other years).
Fall 2026 so far averaged 58.2°F in Eureka, CA (1 day missing), the warmest 1 September to 4 October since 2025, tied 23rd warmest of 140 (with 1984).
Eureka, CA has had 1 freezing night (a low of 32°F or below) in 2026 through 4 October (1 day missing), the most by that date since 2025, tied 92nd most of 140 (with 2024, 2015, 2014 and 16 other years).
The last freeze of spring 2026 in Eureka, CA came on Friday 9 January 2026, the latest since 2025, 103rd latest of 140.

Nearby

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Humboldt County, CA county average
California every city and county

All-time records

About these figures

Daily records for Eureka, CA run from 1886 to 4 October 2026, with 6 days missing; current station EUREKA WFO WOODLEY ISLAND.

Our calculation from NOAA records for Eureka, CA, 1886 to 2026. Preliminary until NOAA's final data.