S
M
T
W
T
F
S
29
63°
49°
30
70°
49°
1
71°
51°
2
68°
48°
3
63°
46°
4
59°
44°
5
65°
44°
6
67°
46°
7
59°
43°
8
57°
44°
9
56°
42°
10
55°
38°
11
55°
34°
12
56°
35°
13
59°
35°
14
58°
35°
15
57°
43°
16
58°
41°
17
66°
45°
18
65°
42°
19
64°
32°
20
57°
30°
21
54°
30°
22
53°
34°
23
54°
34°
24
56°
31°
25
55°
30°
26
53°
31°
27
54°
30°
28
54°
30°
29
55°
37°
30
57°
36°
31
64°
30°
1
55°
28°
2
51°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Ashburn
Ashburn's December 2026 forecast shows daily high temperatures ranging from 51° to 71°, with overnight lows between 27° and 51°. The average high for December is 59° with an average low of 38°. 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 Ashburn. See also: January | February | March.
