S
M
T
W
T
F
S
26
68°
41°
27
67°
43°
28
71°
41°
29
68°
42°
30
73°
43°
31
74°
42°
1
69°
39°
2
69°
38°
3
68°
40°
4
70°
40°
5
71°
40°
6
70°
39°
7
Hist. Avg.
65°
34°
8
Hist. Avg.
65°
34°
9
Hist. Avg.
65°
34°
10
Hist. Avg.
65°
34°
11
Hist. Avg.
65°
34°
12
Hist. Avg.
64°
34°
13
Hist. Avg.
64°
33°
14
Hist. Avg.
64°
33°
15
Hist. Avg.
64°
33°
16
Hist. Avg.
64°
33°
17
Hist. Avg.
64°
33°
18
Hist. Avg.
64°
32°
19
Hist. Avg.
63°
32°
20
Hist. Avg.
63°
32°
21
Hist. Avg.
63°
32°
22
Hist. Avg.
63°
31°
23
Hist. Avg.
63°
31°
24
Hist. Avg.
63°
31°
25
Hist. Avg.
62°
31°
26
Hist. Avg.
62°
30°
27
Hist. Avg.
62°
30°
28
Hist. Avg.
62°
30°
29
Hist. Avg.
62°
30°
30
Hist. Avg.
62°
29°
31
Hist. Avg.
61°
29°
1
Hist. Avg.
61°
29°
2
Hist. Avg.
61°
29°
3
Hist. Avg.
61°
28°
4
Hist. Avg.
61°
28°
5
Hist. Avg.
60°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
August Weather in Keystone
Keystone's August 2026 forecast shows daily high temperatures ranging from 67° to 74°, with overnight lows between 38° and 43°. The average high for August is 70° with an average low of 41°. 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.
