S
M
T
W
T
F
S
28
81°
61°
29
79°
58°
30
80°
59°
1
79°
57°
2
80°
59°
3
83°
65°
4
86°
64°
5
81°
59°
6
80°
58°
7
81°
61°
8
84°
66°
9
86°
66°
10
84°
65°
11
85°
64°
12
84°
60°
13
88°
62°
14
85°
60°
15
82°
59°
16
84°
61°
17
83°
60°
18
84°
65°
19
83°
66°
20
87°
63°
21
88°
66°
22
83°
60°
23
82°
60°
24
84°
61°
25
88°
63°
26
87°
65°
27
88°
63°
28
88°
61°
29
86°
66°
30
82°
67°
31
88°
62°
1
87°
60°
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 79° to 88°, with overnight lows between 57° and 67°. The average high for July is 84° with an average low of 62°. 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.
