S
M
T
W
T
F
S
26
79°
59°
27
79°
52°
28
75°
52°
29
76°
56°
30
77°
54°
31
76°
56°
1
80°
58°
2
78°
52°
3
76°
51°
4
75°
50°
5
76°
51°
6
77°
54°
7
79°
51°
8
75°
50°
9
79°
56°
10
81°
51°
11
80°
57°
12
82°
58°
13
82°
58°
14
81°
57°
15
81°
54°
16
82°
49°
17
74°
50°
18
74°
53°
19
72°
51°
20
73°
50°
21
72°
49°
22
74°
54°
23
75°
55°
24
81°
56°
25
82°
53°
26
81°
48°
27
73°
46°
28
72°
46°
29
72°
48°
30
75°
55°
31
79°
55°
1
79°
54°
2
78°
48°
3
75°
52°
4
78°
54°
5
72°
53°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Great Valley
Great Valley's August 2026 forecast shows daily high temperatures ranging from 72° to 82°, with overnight lows between 46° and 59°. The average high for August is 77° with an average low of 53°. 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 Great Valley. See also: September | October | November.
