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Weather in Luxembourg for September 2025

Your guide to Luxembourg weather in September - trends and predictions
  • In general, the average temperature in Luxembourg at the beginning of September is 23.9 °C. As the month progressed, temperatures tended to significantly cool down, reaching an average of 17.4 °C by the end of September.

  • Luxembourg sees moderate rainfall in September, averaging 8 rainy days.

  • Is September a good time to visit Luxembourg? check out the best time to travel to Luxembourg page.

  • New! Chat with our AI weatherman - it’s amazing and free.
Average dry days
22
Dry days
Average rainy days
8
Rainy days
Average snowy days
0
Snow days
Average temperatures
23°/12°
Temperatures
Average wind speed
15 km/h
Avg max wind
Average humidity
71 %
Avg humidity

Luxembourg in September average weather

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Temperatures trend during September in Luxembourg

See the weather trend as well as the moving average line
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September weather day by day

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Date Weather Temperatures Rain UV More
1 Sept. Light rain shower
Light rain shower
23° /14° 3 mm 5
2 Sept. Patchy rain possible
Patchy rain possible
25° /15° 1.1 mm 6
3 Sept. Sunny
Sunny
24° /15° 2.2 mm 6
4 Sept. Partly cloudy
Partly cloudy
22° /13° 4.5 mm 5
5 Sept. Sunny
Sunny
24° /14° 1.6 mm 6
6 Sept. Sunny
Sunny
23° /13° 3.1 mm 6
7 Sept. Sunny
Sunny
26° /13° 0.7 mm 7
8 Sept. Sunny
Sunny
24° /14° 0.6 mm 6
9 Sept. Sunny
Sunny
22° /14° 2.3 mm 6
10 Sept. Sunny
Sunny
23° /14° 0.3 mm 6
11 Sept. Sunny
Sunny
21° /12° 3.2 mm 5
12 Sept. Moderate rain at times
Moderate rain at times
19° /10° 3.9 mm 5
13 Sept. Overcast
Overcast
16° /8° 0.8 mm 4
14 Sept. Cloudy
Cloudy
18° /9° 0 mm 5
15 Sept. Partly cloudy
Partly cloudy
21° /7° 0 mm 6
16 Sept. Partly cloudy
Partly cloudy
20° /12° 1.7 mm 5
17 Sept. Fog
Fog
23° /12° 0.3 mm 6
18 Sept. Patchy rain possible
Patchy rain possible
22° /13° 2 mm 6
19 Sept. Mist
Mist
20° /11° 1.4 mm 5
20 Sept. Partly cloudy
Partly cloudy
22° /11° 0 mm 6
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
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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.

Guide for Luxembourg in September

In September, Luxembourg experiences a transition from the late summer to early autumn weather. At the beginning of the month, the weather in Luxembourg is generally mild and pleasant, with average temperatures ranging from 15° to 20°.

The days are still relatively long, providing ample opportunity for outdoor activities and sightseeing. However, occasional rainfall can be expected, so it's advisable to carry an umbrella or light raincoat.

As the month progresses towards the end, the temperatures in Luxembourg start to gradually decrease. By the end of September, the average temperatures typically range from 10° to 15°. The days become shorter, and there is a noticeable crispness in the air as autumn takes hold.

Visitors can witness the stunning transformation of the city's foliage, as the leaves begin to change color, creating a picturesque setting for leisurely strolls through the parks and gardens.

Overall, September in Luxembourg offers a delightful blend of lingering warmth and the onset of autumnal charm, making it an ideal time to explore the city's cultural attractions and natural beauty.

Luxembourg in September - FAQ

Is September a good time to visit Luxembourg?
Yes, September is a good time to traveling to Luxembourg, read more about the best time to visit Luxembourg.
What are the expected maximum and minimum temperatures in Luxembourg during September?
Enjoy moderate daytime temperatures of up to 23° and cooler nights around 12°. Ideal for a range of outdoor activities, from hiking to city tours.
How much rainfall should be expected in Luxembourg during September?
In September, Luxembourg can expect light to moderate rainfall, totaling 35.3 mm across approximately 8 days. Occasional showers are possible, and planning ahead for them could be helpful.
What are the typical wind conditions in Luxembourg during September?
The average wind speed in Luxembourg during September is 15 km/h, suggesting breezy to windy conditions, depending on your activities.

What to pack to Luxembourg in September?

As you prepare for your trip to Luxembourg in September, it's important to consider the typical weather patterns for the time of year. Below is a carefully tailored packing list to ensure that your time in Luxembourg, during September, is comfortable and enjoyable, regardless of the weather conditions.

  • Clothing
    • Warm Clothing: Sweaters, hoodies, long pants
    • Rain Gear: Lightweight, waterproof clothing
  • Accessories
    • Sunglasses: For sun protection
    • Sun Hats: Wide-brimmed hats for sun protection in warm weather
    • Scarves: To protect you from the cold wind
    • Gloves/Mittens: Essential for cold weather
    • Warm Hats: Warm hats for insulation in cold weather
    • Umbrellas/Raincoats: For rainy days

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 ☀️
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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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