Luxembourg weather in September 2025

Expect daytime maximum temperatures of 19°C in Luxembourg in September based on long-term weather averages. There are 5 hours of sunshine per day on average with 13 days with some rainfall and typically 71 mm of rainfall in the month.

  • 19°C maximum daytime temperature in September in Luxembourg19
    19°C max day temperature
  • 5 hours of sunshine per day
  • 13 days with some rainfall in September in Luxembourg13
    13 days with some rainfall
  • 10°C minimum night-time temperature in September in Luxembourg10
    10°C min night temperature
  • 13 hours of daylight per day in September in Luxembourg13
    13 hours of daylight per day
  • No heat & humidity in September in Luxembourg0
    No heat & humidity
  • 71 mm monthly rainfall in September in Luxembourg71
    71 mm of monthly rainfall
  • UV (maximum) index 4 (Moderate) in September in Luxembourg4
    4 (Moderate) UV index

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The September weather guide for Luxembourg shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about Luxembourg

How hot is it in Luxembourg in September?

Daytime temperatures usually reach 19°C in Luxembourg in September, falling to 10°C at night.

How sunny is it in Luxembourg in September?

There are normally 5 hours of bright sunshine each day in Luxembourg in September - that's 41% of daylight hours.

Does it rain in Luxembourg in September?

There are usually 13 days with some rain in Luxembourg in September and the average monthly rainfall is 71mm.

Luxembourg September sunrise & sunset times

Browse the sunrise and sunset times for Luxembourg in September 2025. Select a month to view Luxembourg sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:51 19:19
Monday, 15th September 2025 06:12 18:49
Tuesday, 30th September 2025 06:34 18:16

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