S
M
T
W
T
F
S
30
46°
42°
1
45°
39°
2
49°
44°
3
47°
45°
4
47°
41°
5
45°
40°
6
51°
44°
7
58°
49°
8
58°
50°
9
59°
54°
10
56°
49°
11
54°
34°
12
53°
35°
13
48°
41°
14
50°
35°
15
50°
31°
16
51°
38°
17
51°
38°
18
56°
48°
19
58°
41°
20
46°
35°
21
52°
44°
22
43°
38°
23
41°
40°
24
38°
27°
25
33°
23°
26
37°
24°
27
36°
25°
28
41°
23°
29
38°
20°
30
38°
27°
31
38°
29°
1
39°
36°
2
38°
32°
3
35°
32°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Aachen
Aachen's December 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for December is ° with an average low of °. 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 Aachen. See also: January | February | March.
