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
54°
43°
4
64°
50°
5
66°
55°
6
63°
51°
7
57°
46°
8
58°
45°
9
56°
47°
10
60°
50°
11
58°
49°
12
60°
48°
13
59°
49°
14
60°
50°
15
63°
51°
16
64°
48°
17
65°
51°
18
65°
53°
19
64°
52°
20
60°
52°
21
61°
53°
22
61°
53°
23
62°
51°
24
59°
51°
25
60°
50°
26
61°
54°
27
61°
52°
28
62°
52°
29
61°
49°
30
61°
53°
31
63°
55°
1
65°
55°
2
64°
52°
3
63°
56°
4
66°
56°
5
65°
55°
6
64°
57°
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 54° to 66°, with overnight lows between 43° and 57°. The average high for May is 62° with an average low of 51°. 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.
