Luxembourg weather in September 2025

Expect 66°F daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Luxembourg in September. Check more long-term weather averages for Luxembourg in September before you book your next holiday to Luxembourg in 2025/2026.

  • 66°F maximum daytime temperature in September in Luxembourg66
    66°F max day temperature
  • 5 hours of sunshine per day
  • 13 days with some rainfall in September in Luxembourg13
    13 days with some rainfall
  • 50°F minimum night-time temperature in September in Luxembourg50
    50°F 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
  • 2.8 inches monthly rainfall in September in Luxembourg2.8
    2.8 inches 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)  |  Imperial (°F)

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More about Luxembourg

How hot is it in Luxembourg in September?

Daytime temperatures usually reach 66°F in Luxembourg in September, falling to 50°F 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 2.8 inches.

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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