S
M
T
W
T
F
S
26
51°
42°
27
53°
41°
28
52°
46°
29
50°
45°
30
53°
47°
1
52°
46°
2
55°
45°
3
53°
43°
4
56°
47°
5
59°
48°
6
58°
46°
7
55°
48°
8
54°
47°
9
56°
46°
10
55°
44°
11
54°
43°
12
55°
44°
13
54°
44°
14
54°
45°
15
55°
45°
16
55°
44°
17
54°
44°
18
55°
45°
19
56°
45°
20
56°
47°
21
57°
48°
22
58°
50°
23
59°
52°
24
60°
53°
25
62°
52°
26
59°
51°
27
60°
53°
28
60°
53°
29
61°
54°
30
60°
53°
31
60°
54°
1
61°
55°
2
61°
55°
3
62°
54°
4
64°
55°
5
67°
50°
6
64°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Nantucket
Nantucket's May 2026 forecast shows daily high temperatures ranging from 50° to 67°, with overnight lows between 41° and 55°. The average high for May is 57° with an average low of 48°. 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 Nantucket. See also: June | July | August.
