S
M
T
W
T
F
S
29
63°
43°
30
65°
42°
1
63°
42°
2
64°
49°
3
65°
40°
4
68°
39°
5
65°
45°
6
65°
48°
7
64°
41°
8
67°
48°
9
65°
40°
10
65°
34°
11
55°
36°
12
57°
36°
13
62°
29°
14
55°
29°
15
46°
33°
16
47°
31°
17
46°
34°
18
54°
34°
19
51°
41°
20
55°
43°
21
61°
41°
22
60°
34°
23
52°
27°
24
50°
38°
25
51°
32°
26
60°
42°
27
44°
25°
28
45°
26°
29
Hist. Avg.
56°
35°
30
Hist. Avg.
56°
35°
31
Hist. Avg.
56°
35°
1
Hist. Avg.
56°
35°
2
Hist. Avg.
56°
35°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Arlington
Arlington's December 2026 forecast shows daily high temperatures ranging from 44° to 68°, with overnight lows between 25° 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.
