Nantes weather in September 2025

Expect 22°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Nantes in September. Check more long-term weather averages for Nantes in September before you book your next holiday to France in 2025/2026.

  • 22°C maximum daytime temperature in September in Nantes22
    22°C max day temperature
  • 6 hours of sunshine per day
  • 12 days with some rainfall in September in Nantes12
    12 days with some rainfall
  • 12°C minimum night-time temperature in September in Nantes12
    12°C min night temperature
  • 13 hours of daylight per day in September in Nantes13
    13 hours of daylight per day
  • No heat & humidity in September in Nantes0
    No heat & humidity
  • 62 mm monthly rainfall in September in Nantes62
    62 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Nantes5
    5 (Moderate) UV index

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The September weather guide for France (Nantes) 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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How hot is it in Nantes in September?

Daytime temperatures usually reach 22°C in Nantes in September, falling to 12°C at night.

How sunny is it in Nantes in September?

There are normally 6 hours of bright sunshine each day in Nantes in September - that's 50% of daylight hours.

Does it rain in Nantes in September?

There are usually 12 days with some rain in Nantes in September and the average monthly rainfall is 62mm.

Nantes September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:25 19:46
Monday, 15th September 2025 06:44 19:18
Tuesday, 30th September 2025 07:04 18:48

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