S
M
T
W
T
F
S
26
52°
41°
27
61°
40°
28
52°
39°
29
52°
44°
30
55°
46°
1
60°
46°
2
55°
43°
3
52°
36°
4
63°
36°
5
62°
51°
6
62°
55°
7
61°
47°
8
60°
39°
9
58°
40°
10
64°
53°
11
59°
45°
12
58°
39°
13
59°
46°
14
60°
50°
15
56°
46°
16
67°
55°
17
82°
52°
18
67°
55°
19
75°
59°
20
74°
57°
21
64°
47°
22
58°
48°
23
62°
50°
24
66°
54°
25
65°
53°
26
70°
54°
27
68°
55°
28
67°
51°
29
61°
51°
30
62°
55°
31
63°
55°
1
63°
54°
2
64°
54°
3
63°
53°
4
63°
52°
5
64°
56°
6
65°
55°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Barnstable
Barnstable's May 2026 forecast shows daily high temperatures ranging from 56° to 82°, with overnight lows between 46° and 59°. The average high for May is 66° 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 Barnstable. See also: June | July | August.
