S
M
T
W
T
F
S
26
89°
70°
27
90°
70°
28
89°
69°
29
87°
70°
30
86°
69°
31
89°
70°
1
90°
69°
2
90°
70°
3
90°
68°
4
90°
69°
5
89°
67°
6
84°
68°
7
87°
63°
8
84°
64°
9
84°
63°
10
85°
63°
11
86°
68°
12
89°
68°
13
89°
67°
14
88°
62°
15
84°
61°
16
84°
67°
17
85°
67°
18
86°
62°
19
84°
61°
20
83°
61°
21
84°
62°
22
86°
60°
23
86°
60°
24
85°
61°
25
85°
61°
26
87°
65°
27
88°
66°
28
87°
65°
29
88°
67°
30
88°
64°
31
86°
58°
1
82°
57°
2
80°
58°
3
80°
58°
4
81°
57°
5
80°
57°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Valley Forge
Valley Forge's August 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 57° and 70°. The average high for August is 86° with an average low of 64°. 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 Forge. See also: September | October | November.
