S
M
T
W
T
F
S
27
73°
45°
28
73°
45°
29
77°
48°
30
79°
57°
1
86°
64°
2
N/A
3
68°
46°
4
70°
47°
5
64°
40°
6
65°
43°
7
70°
49°
8
77°
51°
9
74°
49°
10
78°
53°
11
79°
52°
12
64°
46°
13
65°
42°
14
62°
44°
15
66°
33°
16
69°
48°
17
68°
47°
18
68°
47°
19
67°
42°
20
56°
38°
21
54°
37°
22
54°
36°
23
60°
45°
24
66°
45°
25
66°
44°
26
65°
36°
27
52°
33°
28
58°
34°
29
57°
39°
30
54°
36°
31
61°
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 52° to 79°, with overnight lows between 33° and 53°. The average high for October is 65° 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.
