S
M
T
W
T
F
S
28
77°
58°
29
83°
59°
30
82°
62°
1
80°
64°
2
83°
65°
3
85°
64°
4
84°
63°
5
78°
62°
6
79°
61°
7
81°
62°
8
82°
63°
9
82°
63°
10
81°
64°
11
78°
63°
12
78°
64°
13
79°
63°
14
78°
63°
15
78°
65°
16
81°
65°
17
79°
64°
18
83°
66°
19
85°
66°
20
84°
65°
21
84°
66°
22
82°
65°
23
82°
66°
24
84°
66°
25
85°
65°
26
80°
63°
27
83°
66°
28
80°
66°
29
79°
65°
30
84°
63°
31
78°
60°
1
78°
61°
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 77° to 85°, with overnight lows between 58° and 66°. The average high for July is 81° with an average low of 64°. 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.