S
M
T
W
T
F
S
27
62°
31°
28
68°
43°
29
73°
46°
30
64°
40°
1
64°
41°
2
75°
43°
3
67°
44°
4
77°
42°
5
83°
53°
6
76°
46°
7
75°
43°
8
74°
50°
9
80°
42°
10
45°
30°
11
33°
27°
12
37°
26°
13
55°
37°
14
56°
37°
15
53°
31°
16
56°
36°
17
65°
37°
18
62°
33°
19
57°
35°
20
60°
34°
21
43°
21°
22
60°
36°
23
58°
34°
24
59°
34°
25
57°
31°
26
57°
31°
27
56°
30°
28
56°
31°
29
50°
26°
30
51°
31°
31
55°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
October Weather in Lewistown
Lewistown's October 2026 forecast shows daily high temperatures ranging from 33° to 80°, with overnight lows between 21° and 50°. The average high for October is 56° with an average low of 33°. 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 Lewistown. See also: November | December | January.
