S
M
T
W
T
F
S
29
49°
30°
30
51°
32°
1
52°
42°
2
51°
43°
3
52°
44°
4
53°
44°
5
52°
43°
6
53°
44°
7
57°
39°
8
50°
33°
9
48°
32°
10
49°
32°
11
65°
36°
12
66°
29°
13
66°
28°
14
46°
29°
15
49°
28°
16
50°
29°
17
48°
33°
18
53°
44°
19
60°
45°
20
64°
42°
21
65°
38°
22
63°
44°
23
63°
43°
24
66°
28°
25
66°
26°
26
47°
27°
27
47°
29°
28
54°
40°
29
57°
41°
30
62°
44°
31
64°
45°
1
64°
39°
2
66°
28°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Brookside
Brookside's December 2026 forecast shows daily high temperatures ranging from 46° to 66°, with overnight lows between 26° and 45°. The average high for December is 56° with an average low of 36°. 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 Brookside. See also: January | February | March.