S
M
T
W
T
F
S
27
81°
59°
28
81°
58°
29
79°
59°
30
79°
57°
1
78°
52°
2
78°
58°
3
80°
58°
4
80°
57°
5
77°
58°
6
77°
57°
7
78°
58°
8
77°
57°
9
77°
57°
10
76°
53°
11
75°
46°
12
63°
42°
13
62°
41°
14
61°
41°
15
61°
42°
16
62°
47°
17
63°
40°
18
60°
39°
19
59°
40°
20
59°
43°
21
60°
46°
22
60°
49°
23
74°
44°
24
73°
41°
25
65°
41°
26
64°
38°
27
56°
35°
28
57°
43°
29
59°
47°
30
58°
37°
31
62°
33°
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 56° to 81°, with overnight lows between 33° and 59°. The average high for October is 69° with an average low of 48°. 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.
