Swiss Alps weather in September 2025

Expect 7°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Swiss Alps in September. Check more long-term weather averages for Swiss Alps in September before you book your next holiday to Swiss Alps in 2025/2026.

  • 7°C maximum daytime temperature in September in Swiss Alps (Zermatt)7
    7°C max day temperature
  • 6 hours of sunshine per day
  • 15 days with some rainfall in September in Swiss Alps (Zermatt)15
    15 days with some rainfall
  • 1°C minimum night-time temperature in September in Swiss Alps (Zermatt)1
    1°C min night temperature
  • 13 hours of daylight per day in September in Swiss Alps (Zermatt)13
    13 hours of daylight per day
  • No heat & humidity in September in Swiss Alps (Zermatt)0
    No heat & humidity
  • 140 mm monthly rainfall in September in Swiss Alps (Zermatt)140
    140 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Swiss Alps (Zermatt)5
    5 (Moderate) UV index

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The September weather guide for Swiss Alps (Zermatt) 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 cold is it in the Swiss Alps in September?

Daytime temperatures usually reach 7°C in Zermatt, Swiss Alps in September, falling to 1°C at night.

How sunny is it in the Swiss Alps in September?

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

Does it rain in the Swiss Alps in September?

There are usually 15 days with some rain in Zermatt, Swiss Alps in September and the average monthly rainfall is 140mm.

Swiss Alps September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:50 19:07
Monday, 15th September 2025 06:07 18:40
Tuesday, 30th September 2025 06:26 18:11

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