S
M
T
W
T
F
S
29
54°
33°
30
53°
29°
1
53°
31°
2
54°
28°
3
53°
28°
4
50°
29°
5
53°
34°
6
57°
44°
7
61°
37°
8
64°
30°
9
59°
29°
10
53°
30°
11
56°
36°
12
56°
38°
13
54°
32°
14
51°
27°
15
48°
27°
16
48°
28°
17
51°
31°
18
52°
39°
19
54°
40°
20
55°
43°
21
62°
42°
22
63°
43°
23
61°
38°
24
64°
36°
25
59°
38°
26
60°
38°
27
59°
27°
28
58°
30°
29
49°
25°
30
49°
22°
31
50°
21°
1
42°
24°
2
46°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Dallas
Dallas's December 2026 forecast shows daily high temperatures ranging from 42° to 64°, with overnight lows between 21° and 44°. The average high for December is 55° with an average low of 32°. 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 Dallas. See also: January | February | March.
