S
M
T
W
T
F
S
27
70°
55°
28
70°
55°
29
71°
46°
30
70°
46°
1
68°
54°
2
76°
45°
3
76°
43°
4
67°
42°
5
63°
43°
6
64°
49°
7
63°
50°
8
64°
50°
9
69°
49°
10
72°
51°
11
74°
48°
12
73°
41°
13
70°
40°
14
60°
42°
15
58°
43°
16
58°
41°
17
59°
43°
18
60°
41°
19
60°
46°
20
63°
47°
21
63°
48°
22
69°
49°
23
68°
46°
24
69°
39°
25
64°
38°
26
60°
35°
27
57°
36°
28
55°
35°
29
55°
33°
30
54°
35°
31
Hist. Avg.
60°
40°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Montana
Montana's October 2026 forecast shows daily high temperatures ranging from 54° to 76°, with overnight lows between 33° and 55°. The average high for October is 65° with an average low of 44°. 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 Montana. See also: November | December | January.
