S
M
T
W
T
F
S
27
81°
59°
28
77°
59°
29
80°
60°
30
80°
59°
1
78°
58°
2
78°
58°
3
79°
57°
4
79°
56°
5
67°
55°
6
70°
57°
7
73°
50°
8
65°
44°
9
65°
49°
10
72°
52°
11
75°
53°
12
75°
53°
13
74°
52°
14
75°
54°
15
75°
52°
16
74°
48°
17
62°
49°
18
62°
51°
19
61°
51°
20
65°
50°
21
68°
44°
22
60°
40°
23
59°
44°
24
63°
47°
25
65°
50°
26
63°
38°
27
65°
41°
28
64°
48°
29
66°
49°
30
69°
52°
31
68°
41°
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 59° to 81°, with overnight lows between 38° and 60°. The average high for October is 70° with an average low of 51°. 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.
