S
M
T
W
T
F
S
26
81°
59°
27
81°
59°
28
82°
60°
29
82°
59°
30
83°
60°
31
83°
65°
1
86°
65°
2
87°
64°
3
87°
65°
4
88°
65°
5
87°
58°
6
83°
58°
7
79°
59°
8
80°
59°
9
82°
60°
10
82°
61°
11
83°
62°
12
84°
63°
13
83°
64°
14
86°
63°
15
84°
64°
16
86°
63°
17
86°
63°
18
84°
60°
19
80°
58°
20
79°
58°
21
79°
63°
22
80°
63°
23
79°
59°
24
83°
61°
25
83°
63°
26
84°
59°
27
83°
57°
28
81°
60°
29
78°
62°
30
83°
61°
31
83°
62°
1
84°
61°
2
83°
62°
3
84°
58°
4
83°
54°
5
81°
60°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Prospect
Prospect's August 2026 forecast shows daily high temperatures ranging from 78° to 88°, with overnight lows between 54° and 65°. The average high for August is 83° with an average low of 61°. 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 Prospect. See also: September | October | November.