S
M
T
W
T
F
S
30
72°
53°
31
73°
52°
1
71°
53°
2
70°
55°
3
73°
54°
4
73°
52°
5
71°
55°
6
72°
53°
7
72°
51°
8
70°
54°
9
69°
51°
10
71°
51°
11
71°
53°
12
69°
54°
13
70°
53°
14
64°
47°
15
65°
51°
16
68°
50°
17
67°
52°
18
65°
50°
19
62°
49°
20
Hist. Avg.
64°
49°
21
Hist. Avg.
64°
49°
22
Hist. Avg.
64°
48°
23
Hist. Avg.
63°
48°
24
Hist. Avg.
63°
48°
25
Hist. Avg.
63°
48°
26
Hist. Avg.
62°
48°
27
Hist. Avg.
62°
47°
28
Hist. Avg.
62°
47°
29
Hist. Avg.
61°
47°
30
Hist. Avg.
61°
47°
1
Hist. Avg.
61°
46°
2
Hist. Avg.
61°
46°
3
Hist. Avg.
60°
46°
Temperature Graph
°F
Avg. Hi
Avg. Lo
Actual Hi
Actual Lo
Forecast Hi
Forecast Lo
*Temporarily Unavailable
September Weather in Luxembourg
Luxembourg's September 2026 forecast shows daily high temperatures ranging from 62° to 73°, with overnight lows between 47° and 55°. The average high for September is 69° with an average low of 52°. 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.
