S
M
T
W
T
F
S
29
53°
36°
30
51°
32°
1
49°
26°
2
38°
24°
3
43°
34°
4
50°
33°
5
46°
33°
6
38°
27°
7
37°
22°
8
35°
22°
9
39°
27°
10
43°
30°
11
45°
28°
12
48°
29°
13
45°
31°
14
40°
27°
15
43°
25°
16
44°
26°
17
40°
22°
18
36°
19°
19
35°
15°
20
32°
13°
21
31°
23°
22
35°
20°
23
38°
21°
24
35°
16°
25
32°
16°
26
32°
24°
27
35°
19°
28
36°
14°
29
31°
17°
30
31°
19°
31
32°
12°
1
34°
7°
2
29°
12°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Brookfield
Brookfield's December 2026 forecast shows daily high temperatures ranging from 29° to 53°, with overnight lows between 7° and 36°. The average high for December is 39° with an average low of 23°. 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 Brookfield. See also: January | February | March.