S
M
T
W
T
F
S
29
43°
26°
30
46°
32°
1
49°
37°
2
48°
34°
3
53°
35°
4
53°
35°
5
51°
29°
6
42°
25°
7
41°
34°
8
52°
37°
9
50°
36°
10
48°
37°
11
51°
36°
12
50°
32°
13
43°
29°
14
41°
26°
15
38°
25°
16
38°
24°
17
39°
27°
18
44°
35°
19
52°
35°
20
49°
34°
21
51°
30°
22
39°
28°
23
42°
34°
24
51°
35°
25
38°
21°
26
38°
22°
27
39°
28°
28
38°
32°
29
52°
27°
30
45°
23°
31
39°
23°
1
38°
21°
2
38°
19°
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 38° to 53°, with overnight lows between 19° and 37°. The average high for December is 45° 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 Ashburn. See also: January | February | March.
