Lausanne weather in September 2025

Expect daytime maximum temperatures of 20°C in Lausanne, Switzerland in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 12 days with some rainfall and typically 86 mm of rainfall in the month.

  • 20°C maximum daytime temperature in September in Lausanne20
    20°C max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in September in Lausanne12
    12 days with some rainfall
  • 9°C minimum night-time temperature in September in Lausanne9
    9°C min night temperature
  • 13 hours of daylight per day in September in Lausanne13
    13 hours of daylight per day
  • No heat & humidity in September in Lausanne0
    No heat & humidity
  • 86 mm monthly rainfall in September in Lausanne86
    86 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Lausanne5
    5 (Moderate) UV index

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The September weather guide for Switzerland (Lausanne) 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 Switzerland

How hot is it in Lausanne in September?

Daytime temperatures usually reach 20°C in Lausanne in September, falling to 9°C at night.

How sunny is it in Lausanne in September?

There are normally 6 hours of bright sunshine each day in Lausanne in September - that's 47% of daylight hours.

Does it rain in Lausanne in September?

There are usually 12 days with some rain in Lausanne in September and the average monthly rainfall is 86mm.

Lausanne September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:54 19:12
Monday, 15th September 2025 06:11 18:45
Tuesday, 30th September 2025 06:31 18:15

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