Luxembourg weather in September 2025
Luxembourg weather in September 2025
Day
19 °C
Night
10 °C
Precipitation
70 mm
in month
Rainy days
10 days
in month
Daylight
12 hours
average
Sunshine
5 hours
average
Humidity
79 %
Day
19 °C
Night
10 °C
Precipitation
70 mm
in month
Rainy days
10 days
in month
Daylight
12 hours
average
Sunshine
5 hours
average
Humidity
79 %
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Weather overview and FAQs
Weather overview
In Luxembourg in September, the average air temperature ranges from 19 °C (65 °F) during the day to 10 °C (50 °F) at night. There are 10 days of rain on average, where the rainfall is 70 mm (2.77 in).
Are there good conditions to visit in Luxembourg in September?
There are good conditions for visiting in Luxembourg in September. There are some people, who may feel a slight chill at 19 °C (65 °F), but others will feel perfectly fine. The temperature of 10 °C (50 °F) at night may make it better to dine inside or to put on more clothes for a dinner outside.
What is the temperature in Luxembourg during the day in September?
In Luxembourg in September, the average daily temperatures will be 19 °C (65 °F). Nice temperature for walking around the city or on the beach, but you will probably get cold soon when wearing a swimsuit. When walking around all day, people used to cold conditions, pull out their shorts and get rid of their sweaters. On some days, when spending time in the direct sun, sunscreen can be useful, especially for people with more sensitive skin.
How many rainy days can I expect in September in Luxembourg?
In September in Luxembourg, we can expect 10 days to be rainy, that is, days when precipitation exceeds 2 mm (0.08 in). Converted to days of the week, this means that it will occur on an average of 2.4 days of the week, or in general - 35 % days.
What is the rainfall intensity in September in Luxembourg?
There is precipitation of 70 mm (2.77 in) in September in Luxembourg, which means 2 mm (0.09 in) rainfall per day on average.
What is the air temperature in Luxembourg in September at night?
The average night temperature in Luxembourg in September is 10 °C (50 °F). The nights will be cool, layers of clothes will be needed for evening and morning walks, the hotel should be equipped with heating.
Is Luxembourg rainier in September than in August?
No, in Luxembourg in September it does not rain more than in August.
Is the temperature rising or falling in the course of time in September in Luxembourg?
During September in Luxembourg, the day temperatures are decreasing - from 21 °C (69 °F) at the beginning of the month to 16 °C (61 °F) at the end of the month.
How many hours of sun to expect in Luxembourg in September?
There is an average length of sunshine of 5 hours per day in Luxembourg in September.
Is there a wet season in September in Luxembourg?
No, there is no wet season in September in Luxembourg - you can expect 10 days of rain during the month.
What level of humidity is to expect in September in Luxembourg?
Humidity in Luxembourg in September is 79 %.
How long is the day (from dawn till dusk) in Luxembourg in September?
The length of daylight in Luxembourg in September is 12 hours.
How windy is it in Luxembourg in September?
An average wind scale that can be expected in Luxembourg in September is 3. It is rather a milder or unnoticeable wind, therefore it will not bother you during your holiday.
Is the weather in Luxembourg warmer in September than in August?
No, September is not warmer in Luxembourg than August.