S
M
T
W
T
F
S
26
83°
64°
27
87°
70°
28
81°
67°
29
82°
63°
30
81°
64°
31
84°
66°
1
86°
65°
2
87°
64°
3
88°
64°
4
87°
66°
5
90°
68°
6
89°
67°
7
87°
64°
8
86°
66°
9
86°
68°
10
85°
68°
11
86°
67°
12
82°
67°
13
83°
66°
14
84°
66°
15
81°
62°
16
81°
66°
17
82°
66°
18
78°
65°
19
81°
66°
20
83°
65°
21
81°
64°
22
80°
64°
23
82°
66°
24
85°
61°
25
78°
58°
26
80°
65°
27
85°
67°
28
86°
66°
29
86°
66°
30
85°
64°
31
81°
57°
1
76°
57°
2
75°
56°
3
76°
56°
4
81°
64°
5
83°
63°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
August Weather in Saint Thomas
Saint Thomas's August 2026 forecast shows daily high temperatures ranging from 75° to 90°, with overnight lows between 56° and 70°. The average high for August is 83° with an average low of 64°. 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 Saint Thomas. See also: September | October | November.
