S
M
T
W
T
F
S
30
71°
57°
31
74°
57°
1
75°
56°
2
75°
57°
3
74°
50°
4
73°
49°
5
72°
50°
6
70°
49°
7
69°
48°
8
66°
49°
9
66°
51°
10
65°
53°
11
64°
52°
12
70°
49°
13
70°
53°
14
Hist. Avg.
66°
50°
15
Hist. Avg.
66°
50°
16
Hist. Avg.
66°
50°
17
Hist. Avg.
65°
50°
18
Hist. Avg.
65°
49°
19
Hist. Avg.
65°
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 64° to 75°, with overnight lows between 48° and 57°. The average high for September is 70° 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.
