St Moritz weather in September 2025

Expect daytime maximum temperatures of 6°C in St Moritz, Switzerland in September based on long-term weather averages. There are 6 hours of sunshine per day on average with 15 days with some rainfall and typically 126 mm of rainfall in the month.

  • 6°C maximum daytime temperature in September in St Moritz6
    6°C max day temperature
  • 6 hours of sunshine per day
  • 15 days with some rainfall in September in St Moritz15
    15 days with some rainfall
  • 1°C minimum night-time temperature in September in St Moritz1
    1°C min night temperature
  • 13 hours of daylight per day in September in St Moritz13
    13 hours of daylight per day
  • No heat & humidity in September in St Moritz0
    No heat & humidity
  • 126 mm monthly rainfall in September in St Moritz126
    126 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in St Moritz5
    5 (Moderate) UV index

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The September weather guide for Switzerland (St Moritz) 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 St Moritz in September?

Daytime temperatures usually reach 6°C in St Moritz in September, falling to 1°C at night.

How sunny is it in St Moritz in September?

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

Does it rain in St Moritz in September?

There are usually 15 days with some rain in St Moritz in September and the average monthly rainfall is 126mm.

St Moritz September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:41 18:59
Monday, 15th September 2025 05:59 18:32
Tuesday, 30th September 2025 06:18 18:02

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