S
M
T
W
T
F
S
29
37°
22°
30
40°
19°
1
37°
15°
2
34°
20°
3
36°
17°
4
37°
17°
5
32°
23°
6
36°
28°
7
38°
32°
8
47°
28°
9
50°
26°
10
45°
25°
11
41°
24°
12
39°
21°
13
37°
21°
14
34°
20°
15
32°
16°
16
31°
18°
17
32°
12°
18
31°
12°
19
30°
9°
20
32°
24°
21
35°
21°
22
38°
10°
23
36°
14°
24
29°
24°
25
40°
17°
26
39°
8°
27
35°
12°
28
25°
5°
29
30°
6°
30
24°
6°
31
39°
8°
1
33°
6°
2
29°
10°
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 24° to 50°, with overnight lows between 5° and 32°. The average high for December is 35° with an average low of 17°. 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.
