S
M
T
W
T
F
S
28
89°
67°
29
89°
74°
30
92°
75°
1
95°
73°
2
94°
74°
3
92°
72°
4
89°
73°
5
87°
70°
6
89°
67°
7
88°
66°
8
89°
69°
9
88°
64°
10
88°
66°
11
89°
67°
12
91°
66°
13
90°
66°
14
88°
65°
15
83°
61°
16
84°
62°
17
83°
61°
18
84°
65°
19
87°
69°
20
89°
68°
21
90°
68°
22
90°
67°
23
89°
69°
24
91°
69°
25
90°
68°
26
90°
69°
27
91°
69°
28
91°
70°
29
92°
68°
30
90°
69°
31
90°
68°
1
89°
67°
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 83° to 95°, with overnight lows between 61° and 74°. The average high for July is 89° with an average low of 68°. 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.
