S
M
T
W
T
F
S
31
72°
57°
1
68°
55°
2
64°
54°
3
69°
57°
4
66°
57°
5
68°
52°
6
72°
49°
7
79°
51°
8
76°
60°
9
63°
51°
10
68°
50°
11
64°
54°
12
64°
49°
13
65°
49°
14
64°
49°
15
65°
54°
16
61°
50°
17
63°
48°
18
74°
49°
19
78°
52°
20
80°
53°
21
63°
50°
22
54°
47°
23
52°
47°
24
47°
46°
25
47°
45°
26
56°
45°
27
58°
47°
28
62°
44°
29
65°
45°
30
61°
50°
1
59°
44°
2
56°
38°
3
52°
41°
4
60°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
September Weather in Luxembourg
Luxembourg's September 2025 forecast shows daily high temperatures ranging from ° to °, with overnight lows between ° and °. The average high for September 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 September weather will actually feel in Luxembourg. See also: October | November | December.
