S
M
T
W
T
F
S
27
58°
26°
28
61°
25°
29
54°
46°
30
60°
32°
1
60°
29°
2
66°
42°
3
66°
35°
4
69°
30°
5
72°
32°
6
71°
38°
7
70°
32°
8
71°
33°
9
65°
44°
10
44°
35°
11
40°
34°
12
52°
25°
13
53°
23°
14
62°
32°
15
59°
28°
16
63°
25°
17
61°
38°
18
58°
25°
19
55°
23°
20
60°
29°
21
61°
23°
22
67°
26°
23
45°
31°
24
48°
31°
25
37°
27°
26
40°
26°
27
41°
27°
28
43°
30°
29
46°
25°
30
45°
28°
31
48°
31°
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 45° to 48°, with overnight lows between 25° and 31°. The average high for October is 46° with an average low of 28°. 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.
