S
M
T
W
T
F
S
26
67°
34°
27
73°
35°
28
65°
34°
29
57°
43°
30
46°
43°
1
58°
35°
2
44°
33°
3
53°
39°
4
64°
33°
5
75°
46°
6
63°
49°
7
62°
43°
8
56°
36°
9
60°
32°
10
66°
44°
11
60°
43°
12
57°
37°
13
56°
36°
14
65°
46°
15
61°
52°
16
76°
50°
17
78°
51°
18
67°
46°
19
89°
47°
20
86°
61°
21
65°
47°
22
69°
38°
23
68°
40°
24
58°
43°
25
68°
51°
26
84°
61°
27
83°
54°
28
67°
48°
29
57°
47°
30
58°
45°
31
64°
46°
1
66°
42°
2
68°
48°
3
71°
52°
4
75°
53°
5
74°
56°
6
73°
53°
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 57° to 84°, with overnight lows between 42° and 61°. The average high for May is 70° with an average low of 50°. 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.
