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Weather in Luxembourg for September 2025

Your guide to Luxembourg weather in September - trends and predictions

    Temperatures

  • Expect cooler weather in the next days in Luxembourg with the forecast suggesting a temperature of 20.4 °C, lower than the historical average.

  • In general, the average temperature in Luxembourg at the beginning of September is 23.3 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.4 °C by the end of September.

    • Rain 🌧️

  • Luxembourg in September brings notable rainfall, with an average of 18 rainy days and a total precipitation of 71.4 mm.

Average dry days
12
Dry days
Average rainy days
18
Rainy days
Average snowy days
0
Snow days
Average temperatures
20°/11°
Temperatures
Average wind speed
18 km/h
Avg max wind
Average humidity
75 %
Avg humidity

Luxembourg Weather September

Move between months or click on a day
August
October
Mon.Tue.Wed.Thu.Fri.Sat.Sun.
1
Light rain shower
22°
2
Light rain shower
23°
3
Patchy rain possible
24°
4
Light rain shower
21°
5
Sunny
23°
6
Sunny
23°
7
Sunny
27°
8
Patchy rain possible
22°
9
Moderate rain
16°
10
Patchy rain possible
21°
11
Patchy rain possible
19°
12
Partly cloudy
18°
13
Partly cloudy
19°
14
Partly cloudy
20°
15
Partly cloudy
23°
16
Patchy rain possible
22°
17
Patchy rain possible
16°
18
Sunny
19°
19
Partly cloudy
20°
20
Sunny
23°
21
Moderate or heavy rain shower
22°
22
Light rain shower
19°
23
Light rain shower
15°
24
Partly cloudy
16°
25
Partly cloudy
17°
26
Overcast
19°
27
Overcast
18°
28
Cloudy
17°
29
Patchy rain possible
18°
30
Sunny
17°

Temperatures trend during September in Luxembourg

See the weather trend as well as the moving average line

September weather in Luxembourg day by day

Click on a date for more information
August October
Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
 22° /13° 5 mm 5
2 Sept. Light rain shower
Light rain shower
 23° /14° 1.3 mm 5
3 Sept. Patchy rain possible
Patchy rain possible
 24° /14° 2.8 mm 5
4 Sept. Light rain shower
Light rain shower
 21° /13° 5.2 mm 5
5 Sept. Sunny
Sunny
 23° /12° 1.2 mm 5
6 Sept. Sunny
Sunny
 23° /12° 2.1 mm 5
7 Sept. Sunny
Sunny
 27° /11° 0 mm 1.4
8 Sept. Patchy rain possible
Patchy rain possible
 22° /15° 4.2 mm 0.8
9 Sept. Moderate rain
Moderate rain
 16° /11° 6.7 mm 0.4
10 Sept. Patchy rain possible
Patchy rain possible
 21° /9° 0.3 mm 0.7
11 Sept. Patchy rain possible
Patchy rain possible
 19° /12° 1.4 mm 0.9
12 Sept. Partly cloudy
Partly cloudy
 18° /10° 0.1 mm 4
13 Sept. Partly cloudy
Partly cloudy
 19° /12° 0 mm 5
14 Sept. Partly cloudy
Partly cloudy
 20° /13° 0 mm 5
15 Sept. Partly cloudy
Partly cloudy
 23° /12° 0 mm 5
16 Sept. Patchy rain possible
Patchy rain possible
 22° /15° 0.2 mm 4
17 Sept. Patchy rain possible
Patchy rain possible
 16° /11° 0.1 mm 3
18 Sept. Sunny
Sunny
 19° /8° 0 mm 4
19 Sept. Partly cloudy
Partly cloudy
 20° /10° 0 mm 4
20 Sept. Sunny
Sunny
 23° /12° 0 mm 5
21 Sept. Moderate or heavy rain shower
Moderate or heavy rain shower
 22° /11° 6.3 mm 6
22 Sept. Light rain shower
Light rain shower
 19° /11° 2.4 mm 5
23 Sept. Light rain shower
Light rain shower
 15° /8° 1.4 mm 4
24 Sept. Partly cloudy
Partly cloudy
 16° /9° 4 mm 4
25 Sept. Partly cloudy
Partly cloudy
 17° /9° 7.3 mm 5
26 Sept. Overcast
Overcast
 19° /10° 15 mm 5
27 Sept. Overcast
Overcast
 18° /10° 0.8 mm 4
28 Sept. Cloudy
Cloudy
 17° /9° 0.9 mm 4
29 Sept. Patchy rain possible
Patchy rain possible
 18° /9° 0.1 mm 4
30 Sept. Sunny
Sunny
 17° /7° 0.4 mm 4
Next
Important Notice
Our weather forecast for Luxembourg in September is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the Luxembourg forecast closer to your planned date for the most up-to-date weather information.
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Luxembourg in September - FAQ

What are the expected maximum and minimum temperatures in Luxembourg during September?
Enjoy moderate daytime temperatures of up to 20° and cooler nights around 11°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Luxembourg during September?
Moderate rainfall is anticipated in Luxembourg during September, with a total of 71.4 mm spread over approximately 18 days. Considering plans for rainy days is advisable.
What are the typical wind conditions in Luxembourg during September?
The average wind speed in Luxembourg during September is 18 km/h, suggesting breezy to windy conditions, depending on your activities.

September rainfall patterns in Luxembourg

Explore the daily rainfall trends and prepare for Luxembourgs September weather 💧

UV exposure in Luxembourg during September

Stay informed about UV levels for safe outdoor activities throughout the month of September ☀️
Provinces in Luxembourg
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Ville de Luxembourg

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Location coordinates Where is Luxembourg?

Get accurate weather forecasts for Luxembourg, located at latitude 49.612 and longitude 6.13. Stay updated with localized weather information tailored for Luxembourg.

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