S
M
T
W
T
F
S
26
87°
67°
27
89°
67°
28
88°
68°
29
90°
67°
30
89°
67°
31
88°
63°
1
85°
64°
2
88°
63°
3
88°
66°
4
90°
67°
5
90°
68°
6
91°
67°
7
86°
65°
8
89°
65°
9
88°
64°
10
89°
58°
11
83°
60°
12
84°
61°
13
84°
59°
14
85°
60°
15
83°
61°
16
82°
64°
17
83°
64°
18
84°
62°
19
83°
60°
20
82°
59°
21
82°
64°
22
83°
64°
23
83°
60°
24
84°
63°
25
88°
58°
26
88°
56°
27
82°
57°
28
81°
59°
29
82°
60°
30
80°
61°
31
83°
62°
1
85°
56°
2
80°
56°
3
80°
57°
4
81°
55°
5
80°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grantley
Grantley's August 2026 forecast shows daily high temperatures ranging from 80° to 91°, with overnight lows between 54° and 68°. The average high for August is 85° with an average low of 62°. 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 Grantley. See also: September | October | November.