S
M
T
W
T
F
S
26
53°
40°
27
53°
40°
28
55°
41°
29
55°
40°
30
53°
38°
1
54°
43°
2
56°
39°
3
55°
41°
4
56°
46°
5
64°
47°
6
61°
42°
7
57°
44°
8
62°
49°
9
66°
50°
10
67°
47°
11
58°
43°
12
58°
43°
13
59°
46°
14
58°
48°
15
58°
48°
16
59°
49°
17
60°
49°
18
68°
42°
19
62°
47°
20
65°
46°
21
64°
44°
22
63°
43°
23
64°
44°
24
63°
44°
25
65°
45°
26
65°
47°
27
66°
47°
28
65°
46°
29
66°
49°
30
66°
51°
31
67°
48°
1
67°
54°
2
68°
52°
3
68°
50°
4
70°
55°
5
73°
54°
6
71°
51°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Block Island
Block Island's May 2026 forecast shows daily high temperatures ranging from 53° to 73°, with overnight lows between 38° and 55°. The average high for May is 62° with an average low of 46°. 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 Block Island. See also: June | July | August.
