S
M
T
W
T
F
S
28
80°
65°
29
90°
64°
30
92°
64°
1
97°
70°
2
98°
71°
3
99°
73°
4
97°
67°
5
88°
70°
6
80°
70°
7
79°
67°
8
83°
67°
9
89°
69°
10
84°
67°
11
88°
67°
12
87°
64°
13
88°
62°
14
92°
63°
15
95°
73°
16
92°
63°
17
89°
68°
18
80°
70°
19
87°
61°
20
84°
66°
21
86°
66°
22
82°
58°
23
85°
59°
24
82°
62°
25
86°
62°
26
84°
63°
27
83°
62°
28
85°
62°
29
82°
63°
30
81°
66°
31
87°
66°
1
84°
62°
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 80° to 92°, with overnight lows between 58° and 70°. The average high for July is 85° with an average low of 63°. 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.
