S
M
T
W
T
F
S
29
57°
44°
30
59°
43°
1
58°
44°
2
62°
48°
3
66°
41°
4
52°
39°
5
52°
41°
6
53°
43°
7
52°
40°
8
54°
45°
9
63°
42°
10
58°
39°
11
50°
34°
12
55°
40°
13
58°
40°
14
57°
44°
15
62°
39°
16
55°
45°
17
63°
44°
18
63°
44°
19
62°
40°
20
54°
37°
21
53°
42°
22
62°
43°
23
61°
40°
24
54°
36°
25
48°
30°
26
48°
32°
27
49°
32°
28
51°
31°
29
50°
30°
30
51°
31°
31
54°
31°
1
51°
38°
2
55°
33°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Arlington
Arlington's December 2026 forecast shows daily high temperatures ranging from 48° to 66°, with overnight lows between 30° and 48°. The average high for December is 56° with an average low of 39°. 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 Arlington. See also: January | February | March.
