S
M
T
W
T
F
S
27
73°
54°
28
79°
45°
29
85°
43°
30
77°
61°
1
71°
61°
2
71°
46°
3
74°
42°
4
77°
46°
5
75°
40°
6
79°
42°
7
84°
50°
8
82°
46°
9
85°
54°
10
N/A
11
84°
61°
12
90°
66°
13
85°
62°
14
73°
58°
15
71°
49°
16
64°
40°
17
61°
42°
18
66°
44°
19
69°
46°
20
69°
45°
21
67°
45°
22
65°
43°
23
64°
39°
24
61°
40°
25
64°
44°
26
68°
40°
27
64°
36°
28
55°
32°
29
54°
40°
30
58°
40°
31
66°
43°
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 54° to 90°, with overnight lows between 32° and 66°. The average high for October is 68° with an average low of 45°. 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.
