S
M
T
W
T
F
S
26
91°
72°
27
92°
73°
28
92°
73°
29
90°
71°
30
91°
72°
31
89°
72°
1
90°
71°
2
91°
72°
3
87°
71°
4
91°
72°
5
90°
72°
6
90°
71°
7
87°
72°
8
87°
72°
9
89°
71°
10
88°
71°
11
86°
70°
12
86°
69°
13
87°
70°
14
89°
67°
15
91°
71°
16
92°
68°
17
88°
69°
18
89°
68°
19
88°
70°
20
91°
66°
21
89°
66°
22
86°
65°
23
85°
65°
24
85°
64°
25
87°
64°
26
90°
65°
27
90°
66°
28
89°
67°
29
91°
68°
30
91°
67°
31
90°
69°
1
90°
66°
2
89°
65°
3
88°
68°
4
89°
64°
5
88°
67°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Valley
Valley's August 2026 forecast shows daily high temperatures ranging from 85° to 92°, with overnight lows between 64° and 73°. The average high for August is 89° with an average low of 69°. 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 Valley. See also: September | October | November.
