S
M
T
W
T
F
S
29
63°
49°
30
68°
49°
1
69°
48°
2
67°
47°
3
59°
43°
4
58°
42°
5
63°
46°
6
65°
43°
7
57°
41°
8
56°
42°
9
55°
40°
10
54°
35°
11
54°
33°
12
55°
33°
13
56°
34°
14
57°
35°
15
56°
45°
16
60°
39°
17
67°
43°
18
64°
37°
19
63°
31°
20
56°
28°
21
52°
30°
22
52°
34°
23
54°
33°
24
57°
30°
25
54°
29°
26
53°
31°
27
52°
29°
28
54°
30°
29
54°
39°
30
58°
35°
31
66°
29°
1
55°
28°
2
51°
27°
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 51° to 69°, with overnight lows between 27° and 49°. The average high for December is 58° with an average low of 37°. 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.
