S
M
T
W
T
F
S
29
52°
37°
30
53°
48°
1
56°
47°
2
53°
44°
3
52°
46°
4
52°
45°
5
54°
40°
6
59°
45°
7
59°
41°
8
57°
38°
9
58°
39°
10
56°
45°
11
65°
30°
12
67°
27°
13
47°
29°
14
50°
31°
15
51°
30°
16
53°
35°
17
56°
41°
18
56°
43°
19
64°
42°
20
62°
37°
21
65°
43°
22
62°
45°
23
68°
28°
24
66°
25°
25
48°
26°
26
47°
28°
27
54°
43°
28
60°
45°
29
65°
45°
30
65°
46°
31
64°
42°
1
66°
34°
2
66°
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 47° to 68°, with overnight lows between 25° and 48°. The average high for December is 58° with an average low of 38°. 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.
