Mont St Michel weather in September 2025

Expect 68°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Mont St Michel in September. Check more long-term weather averages for Mont St Michel in September before you book your next holiday to France in 2025/2026.

• 68
  68°F max day temperature
• 6
  6 hours of sunshine per day
• 13
  13 days with some rainfall
• 54
  54°F min night temperature
• 13
  13 hours of daylight per day
• 0
  No heat & humidity
• 2.4
  2.4 inches of monthly rainfall
• 4
  4 (Moderate) UV index
• 64
  64°F sea temperature

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Mont St Michel by month

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The September weather guide for France (Mont St Michel) 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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Mont St Michel September sunrise & sunset times

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

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