S
M
T
W
T
F
S
27
71°
44°
28
68°
42°
29
69°
42°
30
68°
39°
1
72°
49°
2
73°
47°
3
77°
47°
4
67°
40°
5
65°
38°
6
63°
37°
7
62°
37°
8
63°
36°
9
62°
35°
10
63°
36°
11
62°
36°
12
62°
35°
13
61°
35°
14
62°
38°
15
66°
41°
16
68°
42°
17
67°
41°
18
67°
43°
19
68°
44°
20
67°
44°
21
59°
43°
22
58°
40°
23
59°
35°
24
58°
34°
25
57°
41°
26
62°
34°
27
59°
36°
28
55°
41°
29
57°
33°
30
55°
38°
31
59°
34°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Hermiston
Hermiston's October 2026 forecast shows daily high temperatures ranging from 55° to 77°, with overnight lows between 33° and 49°. The average high for October is 64° with an average low of 39°. 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 Hermiston. See also: November | December | January.
