S
M
T
W
T
F
S
29
48°
38°
30
45°
37°
1
46°
38°
2
45°
38°
3
46°
35°
4
45°
37°
5
44°
37°
6
44°
36°
7
45°
37°
8
44°
37°
9
48°
36°
10
46°
37°
11
38°
29°
12
39°
32°
13
41°
35°
14
42°
37°
15
45°
40°
16
47°
34°
17
47°
32°
18
45°
28°
19
41°
27°
20
39°
28°
21
38°
26°
22
39°
24°
23
38°
27°
24
36°
33°
25
41°
32°
26
41°
28°
27
42°
28°
28
41°
27°
29
39°
26°
30
37°
27°
31
38°
26°
1
39°
26°
2
37°
27°
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 36° to 48°, with overnight lows between 24° and 40°. The average high for December is 42° with an average low of 32°. 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.
