S
M
T
W
T
F
S
29
39°
25°
30
44°
32°
1
47°
36°
2
44°
33°
3
49°
32°
4
48°
34°
5
46°
28°
6
39°
25°
7
37°
32°
8
44°
36°
9
43°
35°
10
44°
36°
11
46°
35°
12
47°
31°
13
38°
27°
14
35°
25°
15
34°
23°
16
33°
22°
17
35°
27°
18
44°
34°
19
47°
33°
20
44°
34°
21
47°
28°
22
34°
26°
23
40°
33°
24
45°
33°
25
34°
19°
26
34°
20°
27
33°
24°
28
34°
31°
29
45°
27°
30
40°
21°
31
34°
20°
1
34°
19°
2
33°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Saint Thomas
Saint Thomas's December 2026 forecast shows daily high temperatures ranging from 33° to 49°, with overnight lows between 17° and 36°. The average high for December is 40° with an average low of 28°. AccuWeather's monthly forecast extends further ahead than any other source, with day-by-day RealFeel® Temperatures giving a complete picture of how December weather will actually feel in Saint Thomas. See also: January | February | March.
