S
M
T
W
T
F
S
26
89°
70°
27
88°
69°
28
89°
68°
29
86°
69°
30
89°
68°
31
82°
67°
1
83°
63°
2
81°
65°
3
80°
65°
4
82°
66°
5
84°
69°
6
89°
70°
7
91°
71°
8
90°
70°
9
89°
69°
10
89°
69°
11
88°
68°
12
89°
68°
13
89°
69°
14
90°
67°
15
86°
62°
16
82°
60°
17
83°
59°
18
81°
57°
19
82°
58°
20
81°
56°
21
80°
58°
22
80°
56°
23
85°
59°
24
86°
65°
25
89°
64°
26
90°
64°
27
89°
66°
28
90°
63°
29
90°
57°
30
80°
56°
31
78°
57°
1
78°
53°
2
77°
56°
3
79°
60°
4
86°
61°
5
85°
61°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grafton
Grafton's August 2026 forecast shows daily high temperatures ranging from 77° to 91°, with overnight lows between 53° and 71°. The average high for August is 85° 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 Grafton. See also: September | October | November.
