S
M
T
W
T
F
S
29
62°
45°
30
63°
44°
1
61°
44°
2
61°
45°
3
63°
44°
4
60°
44°
5
61°
53°
6
68°
55°
7
70°
52°
8
72°
43°
9
70°
45°
10
59°
50°
11
63°
51°
12
66°
52°
13
66°
48°
14
68°
40°
15
68°
41°
16
57°
45°
17
59°
49°
18
61°
50°
19
65°
51°
20
66°
52°
21
68°
52°
22
68°
51°
23
69°
52°
24
69°
50°
25
68°
48°
26
66°
50°
27
65°
47°
28
67°
48°
29
62°
40°
30
67°
37°
31
68°
36°
1
54°
39°
2
58°
39°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in St. Simons
St. Simons's December 2026 forecast shows daily high temperatures ranging from 54° to 72°, with overnight lows between 36° and 55°. The average high for December is 65° with an average low of 47°. 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. Simons. See also: January | February | March.
