S
M
T
W
T
F
S
28
81°
53°
29
84°
63°
30
87°
70°
1
84°
67°
2
83°
68°
3
82°
68°
4
80°
66°
5
79°
62°
6
81°
60°
7
85°
53°
8
84°
61°
9
74°
61°
10
80°
55°
11
82°
55°
12
84°
56°
13
92°
72°
14
96°
66°
15
90°
61°
16
88°
56°
17
79°
60°
18
76°
57°
19
76°
57°
20
78°
56°
21
74°
52°
22
76°
57°
23
78°
57°
24
77°
59°
25
81°
59°
26
78°
56°
27
75°
60°
28
73°
59°
29
72°
58°
30
73°
57°
31
73°
56°
1
74°
60°
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 96°, with overnight lows between 52° and 72°. The average high for July is 79° with an average low of 59°. 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.
