S
M
T
W
T
F
S
26
66°
38°
27
76°
33°
28
74°
37°
29
73°
42°
30
58°
45°
1
65°
39°
2
58°
44°
3
57°
37°
4
78°
34°
5
88°
47°
6
70°
49°
7
64°
45°
8
59°
35°
9
54°
36°
10
73°
49°
11
63°
46°
12
65°
34°
13
65°
44°
14
58°
51°
15
62°
41°
16
82°
53°
17
87°
57°
18
81°
60°
19
92°
63°
20
92°
46°
21
67°
43°
22
64°
43°
23
65°
47°
24
66°
49°
25
71°
53°
26
74°
53°
27
73°
54°
28
76°
54°
29
73°
49°
30
71°
54°
31
72°
53°
1
72°
52°
2
69°
51°
3
68°
50°
4
68°
55°
5
73°
55°
6
74°
54°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Plainville
Plainville's May 2026 forecast shows daily high temperatures ranging from 64° to 92°, with overnight lows between 43° and 63°. The average high for May is 74° with an average low of 52°. 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 Plainville. See also: June | July | August.