S
M
T
W
T
F
S
27
84°
63°
28
85°
62°
29
81°
61°
30
80°
60°
1
82°
62°
2
84°
62°
3
79°
61°
4
83°
61°
5
85°
60°
6
83°
57°
7
84°
52°
8
78°
52°
9
76°
53°
10
76°
53°
11
77°
52°
12
78°
51°
13
75°
51°
14
75°
55°
15
76°
54°
16
75°
56°
17
76°
55°
18
77°
54°
19
78°
55°
20
78°
52°
21
73°
50°
22
80°
54°
23
79°
53°
24
Hist. Avg.
75°
51°
25
Hist. Avg.
75°
51°
26
Hist. Avg.
74°
51°
27
Hist. Avg.
74°
51°
28
Hist. Avg.
74°
50°
29
Hist. Avg.
74°
50°
30
Hist. Avg.
73°
50°
31
Hist. Avg.
73°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Helena
Helena's October 2026 forecast shows daily high temperatures ranging from 73° to 85°, with overnight lows between 50° and 63°. The average high for October is 79° with an average low of 56°. 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.
