S
M
T
W
T
F
S
26
83°
72°
27
83°
72°
28
84°
73°
29
83°
72°
30
83°
72°
1
84°
73°
2
84°
73°
3
83°
72°
4
83°
72°
5
84°
71°
6
83°
73°
7
84°
73°
8
84°
72°
9
85°
72°
10
84°
73°
11
84°
74°
12
85°
75°
13
84°
74°
14
86°
75°
15
85°
75°
16
85°
74°
17
86°
74°
18
86°
73°
19
87°
72°
20
87°
73°
21
88°
73°
22
87°
72°
23
87°
72°
24
86°
73°
25
86°
72°
26
87°
72°
27
87°
73°
28
88°
73°
29
87°
74°
30
87°
74°
31
88°
75°
1
87°
74°
2
88°
75°
3
87°
74°
4
87°
74°
5
88°
75°
6
87°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in Gustavia
Gustavia's May 2026 forecast shows daily high temperatures ranging from 83° to 88°, with overnight lows between 71° and 75°. The average high for May is 86° with an average low of 73°. 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 Gustavia. See also: June | July | August.