S
M
T
W
T
F
S
28
95°
73°
29
95°
73°
30
95°
75°
1
95°
75°
2
96°
72°
3
95°
71°
4
96°
70°
5
94°
69°
6
91°
69°
7
88°
68°
8
88°
69°
9
87°
70°
10
91°
68°
11
91°
71°
12
90°
70°
13
92°
71°
14
92°
71°
15
90°
70°
16
89°
66°
17
90°
69°
18
91°
70°
19
91°
71°
20
90°
71°
21
87°
70°
22
87°
71°
23
85°
71°
24
85°
70°
25
86°
70°
26
87°
71°
27
87°
71°
28
88°
70°
29
87°
71°
30
87°
71°
31
88°
70°
1
87°
69°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Grayson Valley
Grayson Valley's July 2026 forecast shows daily high temperatures ranging from 85° to 96°, with overnight lows between 66° and 75°. The average high for July is 90° with an average low of 70°. 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 Valley. See also: August | September | October.