S
M
T
W
T
F
S
29
55°
24°
30
48°
23°
1
52°
24°
2
55°
23°
3
52°
22°
4
42°
22°
5
47°
21°
6
49°
22°
7
45°
23°
8
41°
22°
9
42°
21°
10
39°
19°
11
40°
20°
12
48°
21°
13
48°
21°
14
51°
22°
15
48°
21°
16
51°
22°
17
51°
21°
18
48°
21°
19
48°
19°
20
42°
20°
21
49°
21°
22
50°
20°
23
42°
19°
24
49°
20°
25
38°
16°
26
41°
13°
27
42°
9°
28
41°
13°
29
39°
9°
30
40°
7°
31
39°
13°
1
39°
12°
2
42°
6°
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 38° to 55°, with overnight lows between 6° and 24°. The average high for December is 46° with an average low of 19°. 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.
