S
M
T
W
T
F
S
26
56°
43°
27
54°
39°
28
54°
40°
29
57°
42°
30
56°
41°
1
56°
44°
2
57°
42°
3
57°
38°
4
56°
38°
5
56°
39°
6
57°
38°
7
59°
41°
8
60°
46°
9
62°
46°
10
62°
42°
11
60°
40°
12
59°
41°
13
58°
41°
14
60°
44°
15
61°
42°
16
62°
43°
17
61°
44°
18
62°
48°
19
63°
44°
20
63°
46°
21
64°
48°
22
66°
48°
23
66°
51°
24
65°
53°
25
72°
52°
26
71°
51°
27
66°
53°
28
73°
53°
29
75°
48°
30
70°
48°
31
67°
50°
1
66°
49°
2
69°
48°
3
71°
55°
4
76°
55°
5
77°
54°
6
76°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in South Middleboro
South Middleboro's May 2026 forecast shows daily high temperatures ranging from 54° to 77°, with overnight lows between 38° and 55°. The average high for May is 63° with an average low of 46°. 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 South Middleboro. See also: June | July | August.