S
M
T
W
T
F
S
27
60°
51°
28
59°
52°
29
60°
51°
30
59°
47°
1
60°
49°
2
58°
47°
3
58°
47°
4
59°
51°
5
60°
51°
6
62°
48°
7
61°
49°
8
61°
49°
9
60°
48°
10
61°
45°
11
58°
46°
12
57°
45°
13
56°
44°
14
57°
45°
15
56°
44°
16
55°
44°
17
55°
43°
18
56°
44°
19
55°
45°
20
55°
48°
21
54°
49°
22
58°
48°
23
58°
48°
24
56°
47°
25
58°
46°
26
57°
47°
27
56°
46°
28
54°
48°
29
56°
47°
30
56°
45°
31
56°
47°
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 54° to 62°, with overnight lows between 43° and 52°. The average high for October is 58° with an average low of 47°. 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.
