S
M
T
W
T
F
S
28
77°
60°
29
78°
57°
30
73°
54°
1
73°
54°
2
74°
55°
3
74°
61°
4
75°
60°
5
75°
57°
6
76°
58°
7
76°
62°
8
82°
62°
9
82°
60°
10
77°
59°
11
78°
61°
12
76°
62°
13
76°
58°
14
77°
56°
15
77°
62°
16
81°
62°
17
76°
60°
18
78°
57°
19
76°
60°
20
76°
64°
21
80°
64°
22
77°
63°
23
77°
63°
24
78°
61°
25
80°
62°
26
81°
61°
27
80°
64°
28
78°
62°
29
80°
59°
30
83°
64°
31
82°
62°
1
84°
56°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
July Weather in Waterville
Waterville's July 2026 forecast shows daily high temperatures ranging from 73° to 84°, with overnight lows between 54° and 64°. The average high for July is 78° with an average low of 60°. 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 Waterville. See also: August | September | October.