S
M
T
W
T
F
S
26
80°
66°
27
66°
57°
28
76°
58°
29
81°
64°
30
79°
67°
1
71°
64°
2
65°
54°
3
71°
51°
4
78°
54°
5
77°
56°
6
83°
64°
7
82°
69°
8
74°
64°
9
82°
66°
10
85°
67°
11
90°
71°
12
73°
63°
13
74°
63°
14
85°
65°
15
80°
57°
16
82°
63°
17
85°
72°
18
84°
69°
19
86°
70°
20
86°
70°
21
89°
71°
22
88°
74°
23
86°
77°
24
86°
75°
25
87°
75°
26
89°
78°
27
90°
76°
28
88°
73°
29
81°
72°
30
81°
68°
31
76°
69°
1
78°
65°
2
81°
68°
3
79°
66°
4
80°
67°
5
80°
69°
6
81°
71°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Saint Helena Island
Saint Helena Island's May 2026 forecast shows daily high temperatures ranging from 76° to 88°, with overnight lows between 65° and 73°. The average high for May is 81° with an average low of 69°. 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 Saint Helena Island. See also: June | July | August.
