S
M
T
W
T
F
S
28
77°
43°
29
79°
45°
30
88°
46°
1
88°
55°
2
89°
61°
3
93°
63°
4
97°
64°
5
94°
62°
6
92°
53°
7
93°
55°
8
94°
56°
9
95°
53°
10
97°
55°
11
95°
55°
12
97°
56°
13
97°
55°
14
96°
56°
15
93°
56°
16
91°
57°
17
94°
56°
18
97°
58°
19
98°
58°
20
98°
57°
21
95°
58°
22
92°
58°
23
92°
56°
24
93°
57°
25
92°
58°
26
92°
58°
27
95°
57°
28
97°
59°
29
97°
57°
30
98°
58°
31
99°
58°
1
98°
57°
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 88° to 99°, with overnight lows between 53° and 64°. The average high for July is 95° with an average low of 57°. 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.
