S
M
T
W
T
F
S
29
42°
27°
30
42°
32°
1
44°
32°
2
44°
31°
3
45°
31°
4
32°
26°
5
44°
24°
6
50°
24°
7
36°
21°
8
35°
17°
9
36°
14°
10
30°
12°
11
29°
14°
12
29°
16°
13
30°
20°
14
32°
20°
15
34°
24°
16
37°
24°
17
44°
18°
18
43°
17°
19
31°
17°
20
31°
14°
21
34°
14°
22
28°
12°
23
29°
15°
24
33°
24°
25
36°
27°
26
42°
26°
27
44°
24°
28
45°
22°
29
36°
21°
30
36°
21°
31
35°
19°
1
37°
17°
2
34°
19°
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 28° to 50°, with overnight lows between 12° and 32°. The average high for December is 37° with an average low of 21°. 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.
