S
M
T
W
T
F
S
26
67°
34°
27
67°
37°
28
66°
32°
29
N/A
30
56°
46°
1
55°
38°
2
59°
37°
3
49°
36°
4
60°
40°
5
61°
43°
6
62°
46°
7
60°
48°
8
57°
40°
9
57°
39°
10
56°
38°
11
57°
39°
12
54°
43°
13
56°
37°
14
57°
40°
15
61°
41°
16
58°
40°
17
59°
41°
18
61°
44°
19
59°
44°
20
64°
43°
21
66°
45°
22
67°
40°
23
60°
42°
24
59°
42°
25
61°
44°
26
63°
43°
27
63°
43°
28
62°
45°
29
61°
46°
30
62°
46°
31
61°
46°
1
63°
42°
2
62°
42°
3
63°
43°
4
63°
43°
5
62°
44°
6
64°
44°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Waterville
Waterville's May 2026 forecast shows daily high temperatures ranging from 49° to 67°, with overnight lows between 36° and 48°. The average high for May is 60° with an average low of 42°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how May weather will actually feel in Waterville. See also: June | July | August.
