S
M
T
W
T
F
S
29
47°
34°
30
50°
36°
1
51°
35°
2
49°
36°
3
51°
34°
4
49°
33°
5
49°
32°
6
47°
33°
7
49°
32°
8
44°
31°
9
40°
31°
10
41°
30°
11
41°
31°
12
42°
29°
13
42°
26°
14
42°
19°
15
37°
20°
16
33°
22°
17
35°
21°
18
34°
28°
19
41°
27°
20
45°
25°
21
39°
20°
22
36°
22°
23
35°
17°
24
36°
24°
25
36°
20°
26
42°
15°
27
34°
17°
28
30°
17°
29
34°
15°
30
32°
19°
31
33°
26°
1
45°
23°
2
43°
15°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Georgetown
Georgetown's December 2026 forecast shows daily high temperatures ranging from 30° to 51°, with overnight lows between 15° and 36°. The average high for December is 41° with an average low of 26°. 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 Georgetown. See also: January | February | March.