S
M
T
W
T
F
S
27
54°
37°
28
N/A
29
43°
34°
30
37°
32°
1
52°
32°
2
66°
39°
3
68°
39°
4
69°
41°
5
69°
38°
6
64°
38°
7
63°
36°
8
63°
37°
9
61°
39°
10
59°
38°
11
59°
37°
12
57°
36°
13
59°
37°
14
57°
31°
15
52°
23°
16
56°
27°
17
56°
26°
18
46°
20°
19
53°
22°
20
53°
23°
21
54°
24°
22
54°
26°
23
53°
27°
24
50°
23°
25
42°
17°
26
48°
23°
27
52°
24°
28
44°
22°
29
49°
25°
30
50°
24°
31
49°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Keystone
Keystone's October 2026 forecast shows daily high temperatures ranging from 42° to 69°, with overnight lows between 17° and 41°. The average high for October is 56° with an average low of 30°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how October weather will actually feel in Keystone. See also: November | December | January.
