S
M
T
W
T
F
S
27
73°
47°
28
71°
46°
29
70°
45°
30
71°
45°
1
71°
46°
2
69°
46°
3
66°
44°
4
63°
44°
5
59°
43°
6
67°
43°
7
68°
42°
8
62°
42°
9
58°
38°
10
53°
31°
11
62°
40°
12
66°
27°
13
53°
24°
14
49°
25°
15
48°
24°
16
50°
25°
17
49°
26°
18
50°
28°
19
50°
29°
20
51°
28°
21
49°
28°
22
48°
29°
23
49°
27°
24
48°
25°
25
46°
25°
26
45°
29°
27
46°
30°
28
47°
26°
29
46°
31°
30
47°
24°
31
47°
22°
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 45° to 73°, with overnight lows between 22° and 47°. The average high for October is 56° with an average low of 34°. 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.
