S
M
T
W
T
F
S
26
105°
72°
27
100°
68°
28
98°
63°
29
101°
66°
30
88°
63°
31
87°
60°
1
100°
58°
2
104°
69°
3
82°
50°
4
76°
43°
5
91°
45°
6
99°
62°
7
92°
65°
8
98°
65°
9
96°
64°
10
90°
65°
11
90°
64°
12
84°
62°
13
81°
61°
14
77°
60°
15
82°
62°
16
79°
63°
17
79°
61°
18
83°
59°
19
82°
60°
20
83°
66°
21
87°
65°
22
82°
64°
23
83°
64°
24
86°
63°
25
79°
56°
26
76°
57°
27
82°
62°
28
87°
64°
29
87°
66°
30
88°
65°
31
87°
64°
1
86°
65°
2
87°
64°
3
86°
63°
4
80°
62°
5
84°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Rapid Valley
Rapid Valley's August 2026 forecast shows daily high temperatures ranging from 76° to 99°, with overnight lows between 56° and 66°. The average high for August is 85° 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 Rapid Valley. See also: September | October | November.