S
M
T
W
T
F
S
27
59°
31°
28
56°
33°
29
62°
28°
30
59°
30°
1
60°
32°
2
61°
34°
3
60°
32°
4
57°
29°
5
58°
28°
6
58°
21°
7
48°
20°
8
49°
19°
9
54°
20°
10
51°
26°
11
57°
29°
12
55°
27°
13
57°
15°
14
48°
17°
15
44°
16°
16
48°
16°
17
45°
20°
18
54°
20°
19
55°
26°
20
56°
26°
21
57°
27°
22
56°
23°
23
56°
22°
24
55°
26°
25
56°
25°
26
54°
18°
27
52°
12°
28
41°
15°
29
40°
21°
30
51°
27°
31
51°
22°
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 40° to 62°, with overnight lows between 12° and 34°. The average high for October is 54° with an average low of 24°. 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.
