S
M
T
W
T
F
S
26
64°
46°
27
63°
46°
28
61°
52°
29
59°
45°
30
59°
45°
31
63°
50°
1
68°
48°
2
68°
50°
3
68°
54°
4
64°
46°
5
63°
43°
6
64°
46°
7
70°
50°
8
64°
52°
9
64°
54°
10
61°
45°
11
61°
46°
12
55°
43°
13
55°
39°
14
54°
41°
15
54°
39°
16
57°
43°
17
61°
45°
18
61°
45°
19
61°
45°
20
63°
46°
21
64°
50°
22
64°
43°
23
59°
43°
24
61°
43°
25
59°
45°
26
61°
45°
27
61°
46°
28
61°
46°
29
57°
39°
30
52°
36°
31
54°
39°
1
55°
39°
2
57°
41°
3
61°
41°
4
61°
43°
5
64°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Keystone
Keystone's August 2026 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for August is ° with an average low of °. 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 Keystone. See also: September | October | November.
