S
M
T
W
T
F
S
28
68°
53°
29
75°
54°
30
82°
53°
1
84°
57°
2
89°
62°
3
93°
62°
4
93°
60°
5
92°
61°
6
90°
59°
7
95°
64°
8
89°
61°
9
84°
58°
10
84°
59°
11
85°
59°
12
91°
64°
13
95°
65°
14
94°
65°
15
93°
64°
16
91°
64°
17
93°
65°
18
97°
66°
19
98°
67°
20
97°
67°
21
98°
66°
22
98°
67°
23
97°
66°
24
96°
66°
25
95°
65°
26
97°
67°
27
98°
67°
28
95°
66°
29
88°
63°
30
87°
61°
31
88°
62°
1
93°
66°
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 68° to 98°, with overnight lows between 53° and 67°. The average high for July is 91° 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 Lewiston. See also: August | September | October.
