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
74°
45°
4
77°
49°
5
83°
49°
6
79°
43°
7
78°
42°
8
74°
42°
9
77°
44°
10
57°
33°
11
38°
26°
12
42°
29°
13
58°
36°
14
57°
36°
15
56°
34°
16
61°
39°
17
65°
37°
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 38° to 83°, with overnight lows between 21° and 49°. The average high for October is 59° with an average low of 35°. 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.
