S
M
T
W
T
F
S
26
87°
69°
27
89°
73°
28
88°
72°
29
86°
68°
30
73°
65°
1
65°
54°
2
73°
53°
3
76°
49°
4
78°
53°
5
82°
60°
6
86°
70°
7
71°
60°
8
70°
62°
9
71°
65°
10
85°
63°
11
80°
68°
12
82°
66°
13
83°
62°
14
87°
63°
15
87°
66°
16
86°
69°
17
89°
70°
18
91°
73°
19
91°
72°
20
84°
71°
21
82°
71°
22
87°
72°
23
76°
69°
24
80°
68°
25
80°
72°
26
88°
75°
27
83°
71°
28
80°
71°
29
85°
71°
30
89°
72°
31
89°
72°
1
89°
72°
2
90°
71°
3
87°
69°
4
84°
70°
5
85°
71°
6
84°
70°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Island
Island's May 2026 forecast shows daily high temperatures ranging from 80° to 90°, with overnight lows between 69° and 72°. The average high for May is 86° with an average low of 71°. 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 Island. See also: June | July | August.
