S
M
T
W
T
F
S
28
91°
58°
29
87°
52°
30
81°
49°
1
80°
52°
2
83°
53°
3
90°
58°
4
93°
58°
5
90°
56°
6
93°
60°
7
88°
65°
8
95°
67°
9
96°
66°
10
97°
65°
11
97°
60°
12
95°
68°
13
98°
69°
14
97°
68°
15
98°
66°
16
88°
62°
17
94°
66°
18
96°
67°
19
98°
68°
20
100°
62°
21
94°
55°
22
88°
55°
23
87°
58°
24
93°
64°
25
97°
66°
26
100°
67°
27
97°
67°
28
92°
62°
29
90°
57°
30
89°
62°
31
93°
58°
1
89°
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 80° to 100°, with overnight lows between 49° and 69°. The average high for July is 92° with an average low of 61°. 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.
