S
M
T
W
T
F
S
26
86°
79°
27
87°
79°
28
86°
79°
29
85°
78°
30
87°
78°
1
86°
79°
2
87°
77°
3
88°
77°
4
88°
79°
5
88°
79°
6
89°
80°
7
88°
79°
8
88°
76°
9
92°
78°
10
90°
80°
11
90°
80°
12
90°
79°
13
89°
80°
14
89°
79°
15
90°
79°
16
90°
79°
17
89°
78°
18
88°
79°
19
88°
80°
20
88°
78°
21
88°
78°
22
88°
77°
23
89°
78°
24
88°
79°
25
89°
77°
26
88°
78°
27
86°
80°
28
86°
79°
29
85°
79°
30
85°
80°
31
86°
81°
1
85°
81°
2
86°
80°
3
86°
81°
4
87°
81°
5
86°
80°
6
85°
81°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
May Weather in St Thomas
St Thomas's May 2026 forecast shows daily high temperatures ranging from 85° to 90°, with overnight lows between 77° and 81°. The average high for May is 87° with an average low of 79°. 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 St Thomas. See also: June | July | August.
