S
M
T
W
T
F
S
29
51°
32°
30
51°
32°
1
49°
25°
2
52°
20°
3
41°
17°
4
40°
15°
5
34°
16°
6
34°
16°
7
35°
20°
8
36°
20°
9
36°
16°
10
32°
16°
11
33°
22°
12
38°
21°
13
40°
15°
14
34°
14°
15
31°
17°
16
32°
25°
17
35°
28°
18
43°
29°
19
46°
26°
20
47°
27°
21
44°
30°
22
45°
26°
23
46°
22°
24
45°
17°
25
37°
20°
26
38°
25°
27
41°
28°
28
44°
27°
29
46°
24°
30
45°
21°
31
43°
15°
1
39°
16°
2
30°
17°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Greentop
Greentop's December 2026 forecast shows daily high temperatures ranging from 30° to 52°, with overnight lows between 14° and 32°. The average high for December is 40° with an average low of 22°. 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 Greentop. See also: January | February | March.