S
M
T
W
T
F
S
26
92°
67°
27
93°
68°
28
92°
67°
29
91°
68°
30
90°
67°
31
89°
66°
1
91°
65°
2
91°
67°
3
90°
66°
4
88°
66°
5
87°
65°
6
87°
65°
7
89°
66°
8
90°
65°
9
88°
66°
10
87°
64°
11
90°
60°
12
88°
60°
13
89°
64°
14
91°
63°
15
86°
62°
16
85°
66°
17
91°
64°
18
92°
65°
19
91°
64°
20
87°
64°
21
90°
63°
22
91°
65°
23
91°
63°
24
84°
58°
25
83°
62°
26
88°
63°
27
90°
64°
28
89°
60°
29
87°
59°
30
82°
56°
31
81°
61°
1
84°
58°
2
83°
59°
3
82°
58°
4
83°
55°
5
82°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Prescott Valley
Prescott Valley's August 2026 forecast shows daily high temperatures ranging from 81° to 93°, with overnight lows between 55° and 68°. The average high for August is 88° with an average low of 63°. 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 Prescott Valley. See also: September | October | November.