S
M
T
W
T
F
S
29
60°
41°
30
56°
46°
1
58°
46°
2
55°
45°
3
57°
46°
4
56°
46°
5
55°
39°
6
54°
44°
7
53°
38°
8
54°
45°
9
55°
44°
10
54°
45°
11
56°
46°
12
58°
47°
13
60°
46°
14
60°
45°
15
58°
44°
16
54°
43°
17
54°
44°
18
55°
44°
19
55°
45°
20
57°
44°
21
53°
44°
22
53°
45°
23
58°
46°
24
58°
44°
25
54°
38°
26
54°
37°
27
56°
37°
28
55°
38°
29
57°
39°
30
56°
44°
31
56°
40°
1
59°
39°
2
56°
45°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Duncans Mills
Duncans Mills's December 2026 forecast shows daily high temperatures ranging from 53° to 60°, with overnight lows between 37° and 47°. The average high for December is 56° with an average low of 43°. 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 Duncans Mills. See also: January | February | March.