S
M
T
W
T
F
S
28
68°
59°
29
67°
57°
30
69°
58°
1
69°
57°
2
73°
57°
3
73°
52°
4
70°
61°
5
70°
60°
6
77°
59°
7
73°
60°
8
83°
60°
9
83°
59°
10
91°
62°
11
89°
68°
12
87°
63°
13
78°
60°
14
82°
60°
15
82°
62°
16
83°
63°
17
79°
61°
18
76°
61°
19
74°
61°
20
75°
57°
21
78°
57°
22
74°
57°
23
76°
61°
24
76°
58°
25
73°
55°
26
73°
62°
27
70°
56°
28
76°
64°
29
73°
62°
30
72°
51°
31
71°
52°
1
70°
52°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Lewistown
Lewistown's July 2026 forecast shows daily high temperatures ranging from 70° to 73°, with overnight lows between 51° and 62°. The average high for July is 72° with an average low of 54°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how July weather will actually feel in Lewistown. See also: August | September | October.
