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