S
M
T
W
T
F
S
27
63°
28°
28
73°
44°
29
69°
50°
30
62°
37°
1
62°
33°
2
77°
41°
3
71°
38°
4
82°
36°
5
85°
52°
6
81°
46°
7
76°
44°
8
80°
43°
9
81°
54°
10
56°
31°
11
32°
30°
12
34°
29°
13
41°
30°
14
48°
34°
15
50°
34°
16
69°
49°
17
73°
39°
18
62°
38°
19
67°
42°
20
60°
37°
21
60°
45°
22
68°
41°
23
54°
31°
24
51°
31°
25
59°
40°
26
57°
39°
27
53°
36°
28
58°
31°
29
47°
26°
30
57°
36°
31
56°
32°
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 47° to 73°, with overnight lows between 26° and 49°. The average high for October is 59° with an average low of 37°. 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.
