S
M
T
W
T
F
S
26
87°
82°
27
87°
81°
28
88°
80°
29
88°
81°
30
87°
82°
31
87°
82°
1
88°
81°
2
87°
81°
3
87°
80°
4
88°
82°
5
88°
82°
6
87°
81°
7
87°
82°
8
88°
82°
9
88°
81°
10
89°
82°
11
88°
82°
12
88°
81°
13
86°
82°
14
90°
79°
15
89°
79°
16
89°
80°
17
90°
79°
18
89°
79°
19
89°
80°
20
90°
80°
21
90°
79°
22
89°
79°
23
89°
80°
24
90°
79°
25
89°
79°
26
90°
80°
27
89°
81°
28
90°
82°
29
89°
80°
30
90°
80°
31
90°
79°
1
89°
80°
2
90°
80°
3
90°
79°
4
89°
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 86° to 90°, with overnight lows between 79° and 82°. 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.
