S
M
T
W
T
F
S
26
96°
64°
27
96°
65°
28
94°
63°
29
91°
62°
30
94°
61°
31
92°
63°
1
96°
64°
2
94°
64°
3
99°
64°
4
99°
65°
5
98°
64°
6
99°
65°
7
99°
65°
8
98°
63°
9
98°
62°
10
97°
61°
11
97°
62°
12
96°
63°
13
98°
63°
14
97°
62°
15
95°
63°
16
93°
62°
17
92°
61°
18
92°
60°
19
91°
62°
20
91°
64°
21
92°
61°
22
91°
61°
23
93°
62°
24
94°
61°
25
96°
64°
26
97°
62°
27
95°
62°
28
94°
63°
29
93°
61°
30
92°
60°
31
91°
59°
1
92°
60°
2
93°
60°
3
94°
61°
4
94°
62°
5
95°
62°
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 91° to 99°, with overnight lows between 59° and 65°. The average high for August is 95° 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.