S
M
T
W
T
F
S
27
81°
63°
28
83°
62°
29
84°
62°
30
85°
60°
1
81°
61°
2
82°
60°
3
79°
61°
4
81°
60°
5
80°
60°
6
82°
58°
7
82°
59°
8
84°
58°
9
83°
58°
10
84°
57°
11
82°
53°
12
82°
50°
13
76°
50°
14
74°
52°
15
75°
56°
16
77°
56°
17
78°
55°
18
79°
56°
19
80°
53°
20
81°
49°
21
75°
50°
22
74°
49°
23
75°
50°
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 74° to 85°, with overnight lows between 49° and 63°. The average high for October is 80° 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.
