S
M
T
W
T
F
S
26
51°
40°
27
58°
41°
28
53°
41°
29
53°
44°
30
53°
46°
1
57°
44°
2
53°
41°
3
54°
43°
4
57°
45°
5
59°
49°
6
60°
52°
7
57°
48°
8
57°
47°
9
56°
49°
10
58°
48°
11
54°
47°
12
56°
45°
13
55°
49°
14
56°
47°
15
57°
48°
16
58°
51°
17
62°
51°
18
60°
49°
19
62°
52°
20
61°
51°
21
63°
48°
22
57°
47°
23
57°
48°
24
58°
52°
25
59°
53°
26
62°
53°
27
63°
50°
28
61°
48°
29
59°
50°
30
61°
52°
31
65°
55°
1
66°
55°
2
61°
54°
3
62°
54°
4
65°
55°
5
64°
56°
6
66°
55°
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 54° to 66°, with overnight lows between 45° and 56°. The average high for May is 60° 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 Nantucket. See also: June | July | August.
