S
M
T
W
T
F
S
29
86°
76°
30
86°
76°
1
85°
75°
2
86°
76°
3
86°
77°
4
87°
76°
5
87°
76°
6
86°
75°
7
86°
76°
8
85°
76°
9
86°
75°
10
86°
76°
11
85°
75°
12
86°
75°
13
86°
76°
14
85°
75°
15
86°
76°
16
85°
75°
17
86°
75°
18
86°
74°
19
85°
75°
20
86°
75°
21
86°
74°
22
85°
75°
23
87°
75°
24
86°
74°
25
85°
74°
26
84°
73°
27
85°
74°
28
85°
75°
29
84°
74°
30
85°
75°
31
84°
74°
1
84°
74°
2
Hist. Avg.
84°
74°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in St Thomas
St Thomas's December 2026 forecast shows daily high temperatures ranging from 84° to 87°, with overnight lows between 73° and 77°. The average high for December is 86° with an average low of 75°. 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.
