S
M
T
W
T
F
S
26
63°
46°
27
70°
48°
28
61°
48°
29
59°
48°
30
66°
52°
1
75°
50°
2
73°
52°
3
68°
57°
4
59°
54°
5
61°
50°
6
55°
46°
7
57°
48°
8
64°
46°
9
68°
50°
10
55°
43°
11
54°
41°
12
63°
41°
13
54°
46°
14
54°
46°
15
57°
45°
16
57°
45°
17
64°
48°
18
59°
48°
19
64°
52°
20
68°
55°
21
75°
55°
22
N/A
23
87°
57°
24
88°
59°
25
92°
63°
26
91°
55°
27
76°
50°
28
73°
50°
29
77°
55°
30
74°
54°
31
69°
52°
1
72°
53°
2
70°
53°
3
71°
51°
4
62°
46°
5
63°
47°
6
63°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Southborough
Southborough's May 2026 forecast shows daily high temperatures ranging from 62° to 92°, with overnight lows between 46° and 63°. The average high for May is 75° with an average low of 53°. 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 Southborough. See also: June | July | August.
