S
M
T
W
T
F
S
27
90°
64°
28
89°
61°
29
94°
65°
30
95°
69°
1
92°
72°
2
91°
70°
3
76°
64°
4
78°
61°
5
77°
56°
6
78°
59°
7
77°
58°
8
80°
58°
9
80°
53°
10
81°
55°
11
83°
57°
12
76°
54°
13
80°
56°
14
71°
50°
15
69°
51°
16
75°
54°
17
76°
53°
18
78°
56°
19
78°
57°
20
77°
58°
21
78°
57°
22
74°
52°
23
67°
49°
24
72°
55°
25
76°
56°
26
76°
56°
27
75°
55°
28
74°
56°
29
69°
56°
30
73°
55°
31
73°
55°
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 67° to 95°, with overnight lows between 49° and 72°. The average high for October is 78° with an average low of 57°. 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.
