S
M
T
W
T
F
S
29
51°
39°
30
51°
34°
1
51°
35°
2
50°
26°
3
52°
23°
4
38°
22°
5
35°
21°
6
36°
21°
7
37°
23°
8
40°
26°
9
39°
27°
10
34°
24°
11
34°
20°
12
33°
23°
13
33°
20°
14
34°
18°
15
31°
14°
16
30°
14°
17
27°
26°
18
34°
31°
19
41°
31°
20
47°
28°
21
46°
31°
22
44°
35°
23
48°
32°
24
47°
27°
25
44°
25°
26
40°
28°
27
41°
30°
28
44°
32°
29
45°
32°
30
46°
29°
31
46°
26°
1
43°
22°
2
38°
21°
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 27° to 52°, with overnight lows between 14° and 39°. The average high for December is 41° with an average low of 26°. 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.
