S
M
T
W
T
F
S
28
66°
44°
29
59°
36°
30
64°
31°
1
64°
29°
2
66°
34°
3
66°
36°
4
66°
36°
5
68°
36°
6
71°
42°
7
67°
40°
8
68°
38°
9
55°
39°
10
61°
43°
11
66°
46°
12
68°
50°
13
68°
48°
14
68°
50°
15
64°
43°
16
68°
45°
17
64°
46°
18
64°
52°
19
68°
48°
20
73°
46°
21
68°
52°
22
64°
45°
23
54°
43°
24
68°
46°
25
64°
50°
26
64°
46°
27
63°
46°
28
61°
52°
29
59°
45°
30
59°
45°
31
63°
50°
1
82°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Keystone
Keystone's July 2026 forecast shows daily high temperatures ranging from 82° to 82°, with overnight lows between 52° and 52°. The average high for July is 82° with an average low of 52°. 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 Keystone. See also: August | September | October.