S
M
T
W
T
F
S
29
42°
31°
30
48°
25°
1
49°
23°
2
41°
27°
3
48°
20°
4
47°
19°
5
34°
17°
6
33°
17°
7
33°
18°
8
35°
21°
9
37°
24°
10
45°
23°
11
43°
22°
12
35°
20°
13
33°
21°
14
34°
19°
15
34°
13°
16
31°
10°
17
29°
13°
18
28°
26°
19
35°
25°
20
37°
20°
21
42°
20°
22
35°
27°
23
43°
29°
24
43°
24°
25
42°
22°
26
41°
22°
27
37°
24°
28
39°
25°
29
41°
26°
30
42°
27°
31
44°
23°
1
44°
22°
2
41°
21°
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 49°, with overnight lows between 10° and 31°. The average high for December is 39° with an average low of 22°. 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.
