S
M
T
W
T
F
S
28
89°
71°
29
92°
68°
30
N/A
1
93°
68°
2
94°
72°
3
95°
71°
4
93°
70°
5
92°
72°
6
88°
70°
7
88°
71°
8
89°
69°
9
86°
70°
10
87°
71°
11
86°
70°
12
87°
70°
13
89°
69°
14
90°
71°
15
90°
70°
16
89°
67°
17
90°
67°
18
89°
68°
19
92°
72°
20
92°
73°
21
91°
73°
22
92°
72°
23
93°
73°
24
94°
73°
25
93°
72°
26
93°
73°
27
94°
74°
28
93°
73°
29
94°
72°
30
93°
73°
31
92°
73°
1
91°
72°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Grayson
Grayson's July 2026 forecast shows daily high temperatures ranging from 86° to 95°, with overnight lows between 67° and 74°. The average high for July is 91° with an average low of 71°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Grayson. See also: August | September | October.