S
M
T
W
T
F
S
29
86°
76°
30
85°
76°
1
87°
75°
2
87°
76°
3
86°
76°
4
86°
75°
5
85°
76°
6
86°
76°
7
86°
75°
8
85°
76°
9
86°
76°
10
86°
74°
11
85°
75°
12
86°
76°
13
85°
74°
14
86°
75°
15
86°
74°
16
85°
74°
17
85°
75°
18
84°
75°
19
85°
74°
20
86°
75°
21
86°
74°
22
85°
74°
23
84°
73°
24
85°
74°
25
85°
75°
26
86°
74°
27
86°
75°
28
85°
74°
29
85°
75°
30
84°
73°
31
84°
74°
1
86°
75°
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 76°. The average high for December is 85° 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.
