S
M
T
W
T
F
S
28
73°
57°
29
72°
56°
30
72°
57°
1
73°
57°
2
73°
58°
3
74°
63°
4
73°
63°
5
74°
61°
6
75°
60°
7
75°
65°
8
81°
65°
9
82°
62°
10
75°
62°
11
77°
64°
12
76°
65°
13
76°
62°
14
77°
59°
15
76°
65°
16
78°
65°
17
76°
64°
18
77°
60°
19
76°
62°
20
76°
66°
21
78°
66°
22
77°
65°
23
76°
64°
24
77°
62°
25
77°
63°
26
78°
64°
27
80°
66°
28
78°
63°
29
81°
63°
30
82°
66°
31
83°
65°
1
84°
58°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Lewiston
Lewiston's July 2026 forecast shows daily high temperatures ranging from 72° to 84°, with overnight lows between 56° and 66°. The average high for July is 77° 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 Lewiston. See also: August | September | October.
