S
M
T
W
T
F
S
29
51°
39°
30
52°
42°
1
52°
42°
2
52°
41°
3
50°
41°
4
50°
40°
5
52°
39°
6
60°
40°
7
59°
37°
8
59°
36°
9
54°
34°
10
53°
39°
11
61°
24°
12
59°
21°
13
42°
24°
14
46°
27°
15
51°
28°
16
52°
35°
17
57°
34°
18
56°
37°
19
60°
36°
20
59°
31°
21
60°
38°
22
59°
36°
23
62°
23°
24
58°
21°
25
43°
23°
26
46°
29°
27
54°
37°
28
58°
38°
29
62°
41°
30
61°
41°
31
61°
36°
1
63°
28°
2
62°
23°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Duncan
Duncan's December 2026 forecast shows daily high temperatures ranging from 42° to 63°, with overnight lows between 21° and 42°. The average high for December is 55° with an average low of 34°. 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 Duncan. See also: January | February | March.
