S
M
T
W
T
F
S
29
68°
37°
30
65°
42°
1
61°
44°
2
65°
44°
3
54°
48°
4
62°
48°
5
68°
46°
6
63°
46°
7
57°
44°
8
56°
37°
9
56°
34°
10
54°
39°
11
57°
44°
12
58°
39°
13
53°
36°
14
52°
33°
15
50°
30°
16
50°
35°
17
Hist. Avg.
57°
38°
18
Hist. Avg.
56°
37°
19
Hist. Avg.
56°
37°
20
Hist. Avg.
56°
37°
21
Hist. Avg.
56°
37°
22
Hist. Avg.
56°
37°
23
Hist. Avg.
56°
37°
24
Hist. Avg.
56°
37°
25
Hist. Avg.
56°
36°
26
Hist. Avg.
56°
36°
27
Hist. Avg.
56°
36°
28
Hist. Avg.
56°
36°
29
Hist. Avg.
55°
36°
30
Hist. Avg.
55°
36°
31
Hist. Avg.
55°
36°
1
Hist. Avg.
57°
37°
2
Hist. Avg.
57°
37°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Plano
Plano's December 2026 forecast shows daily high temperatures ranging from 50° to 68°, with overnight lows between 30° and 48°. The average high for December is 58° with an average low of 40°. 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 Plano. See also: January | February | March.
