S
M
T
W
T
F
S
26
56°
42°
27
56°
43°
28
54°
38°
29
55°
33°
30
52°
33°
1
53°
34°
2
68°
33°
3
71°
47°
4
61°
41°
5
50°
34°
6
47°
31°
7
60°
28°
8
73°
40°
9
61°
44°
10
61°
39°
11
71°
32°
12
69°
51°
13
73°
42°
14
82°
49°
15
86°
48°
16
78°
51°
17
75°
53°
18
60°
52°
19
N/A
20
61°
46°
21
66°
47°
22
62°
48°
23
64°
51°
24
76°
55°
25
81°
60°
26
80°
58°
27
79°
59°
28
78°
57°
29
81°
60°
30
78°
59°
31
80°
58°
1
74°
53°
2
69°
57°
3
72°
55°
4
73°
57°
5
77°
59°
6
75°
59°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
May Weather in Green Isle
Green Isle's May 2026 forecast shows daily high temperatures ranging from 61° to 81°, with overnight lows between 46° and 60°. The average high for May is 74° with an average low of 55°. 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 Green Isle. See also: June | July | August.