S
M
T
W
T
F
S
26
95°
64°
27
94°
62°
28
94°
62°
29
98°
66°
30
99°
67°
31
100°
65°
1
101°
65°
2
103°
67°
3
104°
68°
4
100°
69°
5
97°
63°
6
98°
63°
7
100°
68°
8
99°
70°
9
104°
69°
10
96°
62°
11
96°
61°
12
92°
59°
13
89°
56°
14
86°
57°
15
88°
59°
16
90°
60°
17
89°
61°
18
88°
62°
19
93°
63°
20
95°
62°
21
96°
65°
22
98°
66°
23
94°
61°
24
89°
62°
25
91°
63°
26
95°
64°
27
95°
64°
28
94°
65°
29
93°
63°
30
95°
64°
31
95°
63°
1
96°
64°
2
95°
64°
3
92°
63°
4
93°
62°
5
92°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Grayson
Grayson's August 2026 forecast shows daily high temperatures ranging from 86° to 98°, with overnight lows between 56° and 66°. The average high for August is 93° 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 Grayson. See also: September | October | November.