S
M
T
W
T
F
S
27
64°
34°
28
71°
40°
29
71°
44°
30
70°
51°
1
69°
44°
2
78°
43°
3
71°
41°
4
79°
50°
5
82°
50°
6
79°
43°
7
78°
42°
8
77°
46°
9
77°
50°
10
60°
39°
11
54°
33°
12
59°
34°
13
64°
40°
14
60°
36°
15
56°
38°
16
63°
35°
17
51°
28°
18
58°
30°
19
62°
38°
20
62°
38°
21
61°
37°
22
60°
36°
23
55°
34°
24
60°
38°
25
59°
37°
26
58°
37°
27
59°
30°
28
43°
25°
29
41°
23°
30
40°
21°
31
41°
21°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Helena
Helena's October 2026 forecast shows daily high temperatures ranging from 40° to 82°, with overnight lows between 21° and 50°. The average high for October is 61° with an average low of 36°. 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 Helena. See also: November | December | January.
