S
M
T
W
T
F
S
26
81°
60°
27
82°
62°
28
79°
64°
29
79°
59°
30
84°
55°
31
86°
56°
1
84°
67°
2
70°
61°
3
78°
53°
4
80°
50°
5
84°
52°
6
82°
63°
7
80°
67°
8
85°
64°
9
81°
59°
10
82°
67°
11
78°
60°
12
82°
60°
13
81°
57°
14
80°
52°
15
75°
60°
16
76°
63°
17
74°
59°
18
75°
61°
19
76°
62°
20
77°
62°
21
73°
64°
22
72°
61°
23
74°
61°
24
75°
60°
25
73°
64°
26
77°
65°
27
76°
65°
28
76°
62°
29
70°
58°
30
68°
57°
31
68°
58°
1
69°
62°
2
72°
63°
3
74°
64°
4
75°
64°
5
74°
63°
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 68° to 82°, with overnight lows between 52° and 65°. The average high for August is 75° with an average low of 61°. 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.
