S
M
T
W
T
F
S
27
79°
36°
28
71°
43°
29
72°
31°
30
77°
34°
1
82°
40°
2
88°
43°
3
85°
43°
4
86°
42°
5
83°
42°
6
81°
43°
7
82°
40°
8
82°
41°
9
79°
45°
10
78°
45°
11
60°
39°
12
41°
32°
13
40°
31°
14
56°
27°
15
64°
29°
16
67°
28°
17
69°
33°
18
68°
34°
19
67°
32°
20
64°
34°
21
68°
33°
22
60°
42°
23
48°
38°
24
52°
27°
25
61°
32°
26
64°
27°
27
60°
25°
28
58°
34°
29
57°
35°
30
53°
32°
31
55°
35°
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 52° to 64°, with overnight lows between 25° and 35°. The average high for October is 58° with an average low of 31°. 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.
