S
M
T
W
T
F
S
26
95°
79°
27
89°
78°
28
89°
78°
29
93°
79°
30
94°
84°
31
92°
79°
1
91°
78°
2
93°
78°
3
90°
79°
4
89°
78°
5
90°
78°
6
90°
78°
7
93°
82°
8
95°
82°
9
95°
80°
10
95°
84°
11
92°
83°
12
90°
82°
13
92°
82°
14
95°
83°
15
96°
82°
16
93°
82°
17
94°
84°
18
93°
81°
19
91°
81°
20
93°
80°
21
92°
81°
22
91°
81°
23
92°
81°
24
91°
80°
25
91°
80°
26
90°
79°
27
91°
80°
28
90°
80°
29
91°
80°
30
92°
81°
31
87°
82°
1
87°
83°
2
88°
82°
3
87°
82°
4
87°
81°
5
88°
82°
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 93°, with overnight lows between 79° and 83°. The average high for August is 90° with an average low of 81°. 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.
