S
M
T
W
T
F
S
26
96°
72°
27
98°
69°
28
93°
71°
29
96°
64°
30
98°
66°
31
102°
68°
1
103°
69°
2
104°
68°
3
104°
71°
4
101°
71°
5
100°
72°
6
99°
69°
7
100°
68°
8
101°
70°
9
101°
70°
10
97°
73°
11
96°
70°
12
87°
64°
13
84°
64°
14
81°
61°
15
88°
55°
16
90°
61°
17
96°
60°
18
97°
64°
19
99°
66°
20
97°
67°
21
95°
65°
22
93°
69°
23
89°
64°
24
92°
63°
25
96°
59°
26
98°
61°
27
98°
62°
28
97°
65°
29
87°
63°
30
90°
62°
31
73°
61°
1
89°
54°
2
88°
60°
3
89°
60°
4
89°
62°
5
86°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Sun Valley
Sun Valley's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in Sun Valley. See also: September | October | November.
