S
M
T
W
T
F
S
27
71°
56°
28
75°
56°
29
75°
48°
30
68°
47°
1
66°
55°
2
67°
54°
3
71°
51°
4
73°
52°
5
74°
55°
6
74°
54°
7
72°
55°
8
73°
52°
9
74°
51°
10
70°
47°
11
70°
51°
12
63°
52°
13
64°
51°
14
66°
51°
15
63°
49°
16
69°
49°
17
70°
43°
18
71°
39°
19
60°
42°
20
60°
38°
21
59°
47°
22
59°
48°
23
67°
44°
24
66°
38°
25
59°
36°
26
58°
37°
27
57°
44°
28
63°
38°
29
64°
35°
30
59°
34°
31
66°
41°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Great Falls
Great Falls's October 2026 forecast shows daily high temperatures ranging from 57° to 75°, with overnight lows between 34° and 56°. The average high for October is 67° with an average low of 47°. 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 Great Falls. See also: November | December | January.
