Differdange, Luxembourg — Weather in September 2026

Climate Overview

Differdange, Luxembourg in September has mild conditions, with highs averaging 19.8°C (68°F) and noticeably cooler mornings. Rain falls on about 10 days this month.

This month falls at the beginning of Autumn.

Daily highs in September gradually drop from around 22°C (72°F) at the start to 17°C (62°F) by month's end.

September sees fairly even rainfall, totalling about 75 mm across the month.

Expect around 10.0h of sunshine at the start of September, decreasing to 7.7h by the end.

The warmest days tend to fall around the 5th, averaging 22.3°C (72°F).

Compared to August, this month is about 4°C cooler with 1 fewer rainy days. Temperatures begin dropping heading into October.

Monthly September Averages

Temperature

20°C / 11°C

Feels Like

19°C / 10°C

Rain

10 days · 75 mm

Sunshine

8.8h / day

Humidity

75% — Humid

Wind

16 km/h

Wind Direction

SW (222°)

Gusts

34 km/h

Daylight

12.6 h

Cloud Cover

58%

Clear Sky Days

4.6

UV Index

4 — Moderate

Dew Point

11°C — Comfortable

Moon Phase

Waxing Crescent · 11%

Climate Charts

Daily averages based on historical data (2016–2025)

Daily Temperature

HighLow

Daily Precipitation

Rainfall

Daily Sunshine

Sunshine

Daily Wind Speed

Wind Speed

Sun Position

Sunrise 07:13

Daylight 12.7h

Sunset 19:53

Compare Months

Month	Temp	Feels Like	Rain	Sun	Humidity	UV	Status	Details
January	5°C / 0°C	1°C / -4°C	13days (94 mm) Wet	3.3h Poor	88% Very Muggy	1.2 Low	Poor	View Details
February	7°C / 1°C	3°C / -3°C	11days (70 mm) Wet	5.3h Fair	83% Humid	1.7 Low	Poor	View Details
March	10°C / 2°C	7°C / -2°C	12days (70 mm) Wet	7.3h Good	77% Humid	3.5 Moderate	Poor	View Details
April	14°C / 4°C	11°C / 1°C	12days (58 mm) Wet	9.8h Good	73% Muggy	4.5 Moderate	Fair	View Details
May best	18°C / 9°C	16°C / 6°C	11days (72 mm) Wet	10.9h Excellent	72% Muggy	5.6 High	Good	View Details
June best	22°C / 13°C	22°C / 12°C	12days (83 mm) Wet	11.8h Excellent	72% Muggy	6.4 High	Excellent	View Details
July best	23°C / 14°C	23°C / 13°C	10days (68 mm) Wet	11.6h Excellent	69% Muggy	5.8 High	Excellent	View Details
August best	24°C / 15°C	23°C / 14°C	11days (56 mm) Wet	10.7h Excellent	70% Muggy	5.5 High	Excellent	View Details
September best	20°C / 11°C	19°C / 10°C	10days (75 mm) Wet	8.8h Good	75% Muggy	4 Moderate	Good	View Details
October	15°C / 8°C	13°C / 6°C	12days (93 mm) Wet	5.7h Fair	84% Humid	2.5 Moderate	Fair	View Details
November	9°C / 4°C	6°C / 0°C	13days (78 mm) Wet	3.8h Poor	88% Very Muggy	1.3 Low	Poor	View Details
December	6°C / 2°C	3°C / -2°C	14days (89 mm) Wet	2.6h Poor	91% Very Muggy	0.9 Low	Poor	View Details

What to Wear

Dress in layers — a mix of long sleeves, light sweaters, and a versatile jacket works best for changeable conditions.

A waterproof jacket or compact umbrella is recommended for occasional showers.

Packing List

Warm evening layerUmbrellaWaterproof jacketComfortable walking shoes

Frequently Asked Questions

Expand all

Is September a good time to visit Differdange?

September is typically good for visiting Differdange, with average highs of 20°C (68°F) and around 10 rainy days. Differdange, Luxembourg in September has mild conditions, with highs averaging 19.8°C (68°F) and noticeably cooler morni

Does it rain a lot in Differdange in September?

Differdange typically sees around 10 rainy days in September with 75 mm (3 in) of total rainfall. An umbrella should suffice.

Does it get cold at night in Differdange in September?

Nights in Differdange during September are cool at around 11°C (52°F). Bring a jacket or sweater for evenings.

What should I pack for Differdange in September?

With highs of 20°C (68°F) and lows of 11°C (52°F) in September, we recommend: Warm evening layer, Umbrella, Waterproof jacket, Comfortable walking shoes. Comfortable walking shoes are essential.

Is September among the best months weather-wise in Differdange?

Yes, September offers some of the best weather conditions in Differdange with comfortable temperatures and lower chances of rain.

What is the UV index in Differdange in September?

The average UV index in Differdange during September is 4 (moderate). Sunscreen and sunglasses are recommended during midday hours.

How many hours of daylight are there in Differdange in September?

Differdange gets approximately 13 hours of daylight per day in September, with around 9 hours of sunshine.

Does it snow in Differdange in September?

Snow is uncommon in Differdange during September based on 10-year climate averages.

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