S
M
T
W
T
F
S
29
55°
39°
30
56°
50°
1
58°
49°
2
55°
46°
3
55°
48°
4
54°
47°
5
55°
43°
6
61°
47°
7
61°
43°
8
59°
41°
9
60°
41°
10
58°
47°
11
67°
32°
12
68°
30°
13
49°
31°
14
52°
34°
15
53°
33°
16
55°
37°
17
58°
44°
18
58°
46°
19
66°
44°
20
64°
40°
21
67°
46°
22
64°
48°
23
69°
31°
24
68°
28°
25
50°
29°
26
49°
31°
27
56°
45°
28
62°
47°
29
67°
48°
30
68°
49°
31
67°
45°
1
68°
36°
2
68°
30°
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 49° to 69°, with overnight lows between 28° and 50°. The average high for December is 60° with an average low of 41°. 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.
