S
M
T
W
T
F
S
28
79°
49°
29
77°
54°
30
78°
54°
1
79°
48°
2
78°
56°
3
79°
56°
4
80°
57°
5
81°
55°
6
81°
55°
7
77°
54°
8
76°
50°
9
75°
55°
10
79°
53°
11
73°
48°
12
76°
55°
13
80°
55°
14
81°
53°
15
81°
55°
16
80°
50°
17
76°
55°
18
77°
54°
19
73°
54°
20
74°
56°
21
75°
53°
22
73°
49°
23
72°
54°
24
73°
56°
25
72°
56°
26
75°
57°
27
80°
56°
28
82°
55°
29
81°
55°
30
82°
59°
31
82°
58°
1
77°
57°
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 72° to 82°, with overnight lows between 48° and 59°. The average high for July is 78° with an average low of 54°. 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.