S
M
T
W
T
F
S
28
78°
59°
29
77°
58°
30
70°
58°
1
72°
57°
2
72°
58°
3
71°
55°
4
72°
54°
5
70°
54°
6
71°
58°
7
72°
59°
8
72°
58°
9
73°
59°
10
74°
54°
11
75°
52°
12
75°
56°
13
79°
54°
14
77°
51°
15
75°
54°
16
76°
57°
17
76°
55°
18
78°
52°
19
74°
51°
20
75°
54°
21
77°
60°
22
80°
53°
23
76°
50°
24
73°
52°
25
74°
56°
26
75°
60°
27
76°
53°
28
76°
53°
29
74°
52°
30
74°
52°
31
75°
53°
1
76°
53°
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 70° to 80°, with overnight lows between 50° and 60°. The average high for July is 75° with an average low of 55°. 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.
