S
M
T
W
T
F
S
26
59°
45°
27
61°
46°
28
55°
43°
29
61°
43°
30
66°
48°
1
64°
52°
2
59°
52°
3
54°
46°
4
55°
45°
5
55°
45°
6
54°
45°
7
57°
43°
8
54°
48°
9
55°
45°
10
59°
43°
11
54°
46°
12
55°
46°
13
55°
45°
14
55°
46°
15
55°
41°
16
55°
41°
17
54°
43°
18
55°
45°
19
63°
52°
20
64°
52°
21
66°
55°
22
66°
55°
23
66°
52°
24
73°
57°
25
75°
54°
26
70°
55°
27
72°
54°
28
68°
57°
29
70°
54°
30
64°
52°
31
64°
56°
1
68°
54°
2
63°
51°
3
61°
50°
4
59°
47°
5
59°
47°
6
59°
50°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Greenisland
Greenisland's May 2026 forecast shows daily high temperatures ranging from 59° to 68°, with overnight lows between 47° and 56°. The average high for May is 62° 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 Greenisland. See also: June | July | August.
