S
M
T
W
T
F
S
27
73°
45°
28
73°
45°
29
77°
48°
30
79°
57°
1
86°
64°
2
75°
48°
3
66°
46°
4
73°
45°
5
66°
43°
6
70°
43°
7
N/A
8
73°
46°
9
76°
57°
10
76°
58°
11
66°
55°
12
75°
58°
13
68°
44°
14
62°
46°
15
71°
51°
16
68°
46°
17
57°
40°
18
56°
42°
19
59°
43°
20
62°
43°
21
63°
44°
22
55°
38°
23
53°
34°
24
54°
36°
25
58°
40°
26
63°
40°
27
60°
34°
28
51°
32°
29
50°
32°
30
52°
36°
31
60°
38°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
October Weather in Lewistown
Lewistown's October 2026 forecast shows daily high temperatures ranging from 50° to 76°, with overnight lows between 32° and 58°. The average high for October is 62° with an average low of 43°. 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.
