S
M
T
W
T
F
S
27
79°
62°
28
81°
63°
29
77°
64°
30
78°
69°
1
74°
62°
2
71°
50°
3
76°
47°
4
79°
54°
5
78°
48°
6
85°
50°
7
88°
56°
8
88°
57°
9
87°
56°
10
88°
57°
11
89°
61°
12
89°
67°
13
93°
62°
14
64°
57°
15
71°
51°
16
58°
39°
17
61°
34°
18
68°
38°
19
69°
44°
20
73°
46°
21
76°
53°
22
78°
49°
23
78°
51°
24
80°
50°
25
78°
52°
26
76°
57°
27
69°
56°
28
78°
61°
29
80°
61°
30
70°
55°
31
64°
55°
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 64° to 80°, with overnight lows between 52° and 61°. The average high for October is 74° with an average low of 57°. 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.
