S
M
T
W
T
F
S
26
54°
44°
27
73°
41°
28
66°
50°
29
54°
45°
30
57°
43°
1
48°
39°
2
50°
38°
3
64°
34°
4
77°
50°
5
66°
47°
6
57°
45°
7
59°
37°
8
62°
44°
9
73°
50°
10
64°
46°
11
58°
39°
12
66°
40°
13
61°
46°
14
67°
46°
15
72°
43°
16
79°
51°
17
87°
60°
18
89°
65°
19
88°
66°
20
69°
51°
21
60°
47°
22
61°
52°
23
61°
57°
24
73°
54°
25
75°
54°
26
80°
53°
27
81°
57°
28
73°
53°
29
80°
57°
30
66°
50°
31
72°
51°
1
79°
55°
2
74°
54°
3
79°
56°
4
82°
65°
5
83°
63°
6
79°
64°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Millbury
Millbury's May 2026 forecast shows daily high temperatures ranging from 66° to 83°, with overnight lows between 50° and 65°. The average high for May is 77° with an average low of 57°. 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 Millbury. See also: June | July | August.