S
M
T
W
T
F
S
27
64°
44°
28
60°
34°
29
61°
40°
30
60°
39°
1
60°
35°
2
61°
36°
3
58°
34°
4
58°
41°
5
57°
42°
6
58°
41°
7
59°
38°
8
66°
42°
9
67°
42°
10
64°
40°
11
65°
38°
12
54°
31°
13
50°
30°
14
51°
30°
15
51°
31°
16
49°
29°
17
49°
28°
18
50°
32°
19
49°
33°
20
49°
30°
21
51°
36°
22
59°
39°
23
59°
39°
24
57°
38°
25
46°
39°
26
49°
27°
27
46°
32°
28
48°
27°
29
46°
26°
30
46°
27°
31
48°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Eureka
Eureka's October 2026 forecast shows daily high temperatures ranging from 46° to 67°, with overnight lows between 26° and 44°. The average high for October is 55° with an average low of 35°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Eureka. See also: November | December | January.
