S
M
T
W
T
F
S
26
85°
61°
27
84°
70°
28
82°
64°
29
68°
61°
30
66°
50°
1
66°
48°
2
70°
43°
3
77°
56°
4
83°
62°
5
77°
52°
6
64°
50°
7
66°
50°
8
74°
55°
9
76°
57°
10
76°
62°
11
71°
55°
12
73°
56°
13
77°
59°
14
80°
62°
15
76°
62°
16
82°
61°
17
81°
66°
18
80°
66°
19
81°
65°
20
80°
64°
21
82°
61°
22
76°
59°
23
77°
59°
24
77°
60°
25
75°
59°
26
77°
59°
27
78°
60°
28
79°
61°
29
81°
64°
30
84°
68°
31
82°
69°
1
81°
68°
2
82°
64°
3
82°
65°
4
81°
70°
5
83°
71°
6
84°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Deans Island
Deans Island's May 2026 forecast shows daily high temperatures ranging from 64° to 84°, with overnight lows between 50° and 71°. The average high for May is 78° with an average low of 61°. 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 Deans Island. See also: June | July | August.