S
M
T
W
T
F
S
27
89°
70°
28
83°
63°
29
91°
62°
30
86°
63°
1
90°
64°
2
102°
65°
3
102°
72°
4
101°
72°
5
102°
73°
6
101°
73°
7
99°
72°
8
97°
67°
9
91°
65°
10
84°
65°
11
75°
57°
12
67°
53°
13
69°
56°
14
78°
59°
15
85°
60°
16
86°
61°
17
85°
59°
18
86°
60°
19
82°
61°
20
83°
60°
21
88°
47°
22
83°
56°
23
83°
57°
24
83°
57°
25
82°
56°
26
82°
57°
27
81°
56°
28
82°
55°
29
81°
55°
30
81°
54°
31
80°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Sun Valley
Sun Valley's October 2026 forecast shows daily high temperatures ranging from 67° to 97°, with overnight lows between 47° and 67°. The average high for October is 82° with an average low of 58°. 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 Sun Valley. See also: November | December | January.
