S
M
T
W
T
F
S
29
39°
31°
30
40°
30°
1
41°
30°
2
39°
29°
3
38°
28°
4
38°
28°
5
39°
29°
6
38°
29°
7
39°
28°
8
38°
29°
9
45°
34°
10
44°
30°
11
Hist. Avg.
35°
28°
12
Hist. Avg.
35°
28°
13
Hist. Avg.
35°
28°
14
Hist. Avg.
35°
28°
15
Hist. Avg.
35°
28°
16
Hist. Avg.
35°
28°
17
Hist. Avg.
35°
28°
18
Hist. Avg.
35°
28°
19
Hist. Avg.
35°
28°
20
Hist. Avg.
35°
28°
21
Hist. Avg.
35°
27°
22
Hist. Avg.
34°
27°
23
Hist. Avg.
34°
27°
24
Hist. Avg.
34°
27°
25
Hist. Avg.
34°
27°
26
Hist. Avg.
34°
27°
27
Hist. Avg.
34°
27°
28
Hist. Avg.
34°
27°
29
Hist. Avg.
34°
27°
30
Hist. Avg.
34°
27°
31
Hist. Avg.
34°
27°
1
Hist. Avg.
33°
27°
2
Hist. Avg.
33°
27°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
December Weather in Siegen
Siegen's December 2026 forecast shows daily high temperatures ranging from 38° to 45°, with overnight lows between 28° and 34°. The average high for December is 40° with an average low of 30°. 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 Siegen. See also: January | February | March.
