S
M
T
W
T
F
S
29
70°
39°
30
71°
35°
1
54°
34°
2
57°
35°
3
62°
42°
4
65°
45°
5
66°
47°
6
66°
47°
7
65°
41°
8
67°
43°
9
59°
47°
10
64°
48°
11
67°
46°
12
69°
44°
13
67°
44°
14
66°
46°
15
64°
37°
16
68°
30°
17
56°
30°
18
53°
31°
19
55°
36°
20
54°
37°
21
53°
41°
22
62°
45°
23
62°
44°
24
61°
33°
25
60°
28°
26
51°
29°
27
51°
38°
28
57°
42°
29
61°
39°
30
58°
42°
31
54°
28°
1
67°
27°
2
50°
26°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Millbrook
Millbrook's December 2026 forecast shows daily high temperatures ranging from 50° to 71°, with overnight lows between 26° and 48°. The average high for December is 61° with an average low of 38°. 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 Millbrook. See also: January | February | March.