S
M
T
W
T
F
S
29
42°
27°
30
39°
29°
1
37°
30°
2
41°
34°
3
43°
30°
4
48°
25°
5
42°
32°
6
37°
33°
7
41°
32°
8
44°
33°
9
38°
25°
10
43°
36°
11
44°
34°
12
Hist. Avg.
35°
22°
13
Hist. Avg.
34°
21°
14
Hist. Avg.
34°
21°
15
Hist. Avg.
33°
21°
16
Hist. Avg.
33°
20°
17
Hist. Avg.
33°
20°
18
Hist. Avg.
33°
20°
19
Hist. Avg.
33°
20°
20
Hist. Avg.
32°
19°
21
Hist. Avg.
32°
19°
22
Hist. Avg.
32°
19°
23
Hist. Avg.
32°
19°
24
Hist. Avg.
32°
19°
25
Hist. Avg.
31°
18°
26
Hist. Avg.
31°
18°
27
Hist. Avg.
31°
18°
28
Hist. Avg.
31°
18°
29
Hist. Avg.
31°
17°
30
Hist. Avg.
31°
17°
31
Hist. Avg.
30°
17°
1
Hist. Avg.
30°
17°
2
Hist. Avg.
30°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in St. Thomas
St. Thomas's December 2026 forecast shows daily high temperatures ranging from 37° to 48°, with overnight lows between 25° and 36°. The average high for December is 41° with an average low of 31°. 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 St. Thomas. See also: January | February | March.
