S
M
T
W
T
F
S
29
11°
-10°
30
12°
-8°
1
3°
-8°
2
6°
-12°
3
5°
-15°
4
2°
-16°
5
1°
-16°
6
0°
-15°
7
0°
-5°
8
6°
-16°
9
5°
-16°
10
2°
-15°
11
2°
2°
12
18°
-6°
13
18°
-5°
14
17°
-6°
15
10°
-2°
16
12°
-5°
17
16°
-16°
18
14°
-16°
19
2°
-4°
20
10°
-1°
21
14°
-7°
22
16°
-16°
23
14°
-16°
24
5°
-17°
25
2°
-21°
26
1°
-21°
27
-1°
-21°
28
Hist. Avg.
7°
-6°
29
Hist. Avg.
7°
-6°
30
Hist. Avg.
6°
-7°
31
Hist. Avg.
6°
-7°
1
Hist. Avg.
6°
-7°
2
Hist. Avg.
6°
-7°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Richardson
Richardson's December 2026 forecast shows daily high temperatures ranging from -1° to 18°, with overnight lows between -21° and 2°. The average high for December is 8° with an average low of -11°. 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 Richardson. See also: January | February | March.
