S
M
T
W
T
F
S
26
88°
78°
27
89°
77°
28
90°
78°
29
88°
79°
30
89°
78°
31
89°
78°
1
90°
78°
2
88°
78°
3
88°
78°
4
89°
79°
5
89°
79°
6
88°
80°
7
89°
80°
8
90°
79°
9
89°
79°
10
90°
80°
11
89°
79°
12
88°
80°
13
89°
79°
14
89°
79°
15
90°
80°
16
90°
80°
17
89°
79°
18
90°
79°
19
90°
77°
20
89°
80°
21
90°
79°
22
89°
79°
23
90°
80°
24
89°
79°
25
90°
80°
26
89°
80°
27
90°
79°
28
90°
79°
29
89°
79°
30
90°
79°
31
89°
80°
1
Hist. Avg.
90°
80°
2
Hist. Avg.
90°
80°
3
Hist. Avg.
90°
80°
4
Hist. Avg.
90°
80°
5
Hist. Avg.
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 88° to 90°, with overnight lows between 77° and 80°. The average high for August is 89° 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 August weather will actually feel in St Thomas. See also: September | October | November.
