S
M
T
W
T
F
S
29
48°
40°
30
57°
36°
1
58°
32°
2
52°
33°
3
55°
27°
4
56°
25°
5
43°
26°
6
41°
23°
7
41°
24°
8
42°
28°
9
42°
28°
10
55°
31°
11
42°
28°
12
42°
28°
13
41°
25°
14
42°
24°
15
40°
22°
16
39°
19°
17
37°
22°
18
37°
31°
19
44°
35°
20
46°
28°
21
52°
29°
22
45°
37°
23
53°
38°
24
54°
35°
25
53°
33°
26
51°
32°
27
45°
34°
28
49°
36°
29
52°
37°
30
52°
37°
31
54°
33°
1
54°
30°
2
50°
30°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Greenbelt
Greenbelt's December 2026 forecast shows daily high temperatures ranging from 37° to 58°, with overnight lows between 19° and 40°. The average high for December is 48° with an average low of 30°. 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 Greenbelt. See also: January | February | March.
