S
M
T
W
T
F
S
26
87°
81°
27
87°
81°
28
88°
80°
29
87°
81°
30
87°
81°
31
88°
80°
1
87°
81°
2
87°
81°
3
88°
80°
4
87°
81°
5
87°
81°
6
88°
80°
7
90°
79°
8
89°
80°
9
89°
79°
10
90°
79°
11
89°
80°
12
89°
80°
13
90°
79°
14
89°
79°
15
88°
78°
16
88°
79°
17
89°
79°
18
90°
80°
19
89°
80°
20
90°
79°
21
89°
80°
22
90°
79°
23
90°
80°
24
89°
80°
25
90°
79°
26
90°
80°
27
89°
80°
28
90°
79°
29
90°
81°
30
89°
80°
31
91°
80°
1
90°
78°
2
89°
80°
3
89°
80°
4
90°
79°
5
89°
80°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in St Thomas
St Thomas's August 2026 forecast shows daily high temperatures ranging from 87° to 91°, with overnight lows between 78° and 81°. The average high for August is 89° with an average low of 80°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how August weather will actually feel in St Thomas. See also: September | October | November.
