S
M
T
W
T
F
S
29
38°
34°
30
41°
38°
1
42°
38°
2
41°
34°
3
37°
32°
4
33°
30°
5
33°
28°
6
32°
27°
7
32°
29°
8
33°
28°
9
32°
25°
10
30°
24°
11
31°
26°
12
31°
25°
13
30°
25°
14
31°
27°
15
32°
27°
16
37°
31°
17
38°
36°
18
38°
30°
19
37°
29°
20
33°
30°
21
39°
34°
22
40°
33°
23
39°
33°
24
37°
36°
25
40°
35°
26
40°
34°
27
39°
34°
28
38°
33°
29
38°
34°
30
41°
34°
31
40°
33°
1
39°
32°
2
38°
25°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Brilon
Brilon's December 2026 forecast shows daily high temperatures ranging from 30° to 42°, with overnight lows between 24° and 38°. The average high for December is 36° with an average low of 31°. 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 Brilon. See also: January | February | March.
