S
M
T
W
T
F
S
29
46°
34°
30
47°
35°
1
43°
36°
2
45°
36°
3
45°
37°
4
44°
37°
5
44°
35°
6
43°
32°
7
43°
32°
8
39°
34°
9
40°
33°
10
38°
34°
11
42°
34°
12
42°
33°
13
40°
33°
14
41°
31°
15
40°
38°
16
46°
36°
17
46°
37°
18
45°
38°
19
45°
37°
20
47°
34°
21
45°
33°
22
41°
32°
23
37°
33°
24
38°
34°
25
38°
30°
26
39°
29°
27
38°
27°
28
37°
26°
29
35°
29°
30
35°
33°
31
37°
34°
1
43°
33°
2
40°
36°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
December Weather in Luxembourg
Luxembourg's December 2026 forecast shows daily high temperatures ranging from 35° to 47°, with overnight lows between 26° and 38°. The average high for December is 42° with an average low of 34°. 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 Luxembourg. See also: January | February | March.
