Grenoble weather in September 2025

Expect 19°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Grenoble in September. Check more long-term weather averages for Grenoble in September before you book your next holiday to France in 2025/2026.

  • 19°C maximum daytime temperature in September in Grenoble19
    19°C max day temperature
  • 7 hours of sunshine per day
  • 10 days with some rainfall in September in Grenoble10
    10 days with some rainfall
  • 10°C minimum night-time temperature in September in Grenoble10
    10°C min night temperature
  • 12 hours of daylight per day in September in Grenoble12
    12 hours of daylight per day
  • No heat & humidity in September in Grenoble0
    No heat & humidity
  • 89 mm monthly rainfall in September in Grenoble89
    89 mm of monthly rainfall
  • UV (maximum) index 5 (Moderate) in September in Grenoble5
    5 (Moderate) UV index

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The September weather guide for France (Grenoble) 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 France

How hot is it in Grenoble in September?

Daytime temperatures usually reach 19°C in Grenoble in September, falling to 10°C at night.

How sunny is it in Grenoble in September?

There are normally 7 hours of bright sunshine each day in Grenoble in September - that's 54% of daylight hours.

Does it rain in Grenoble in September?

There are usually 10 days with some rain in Grenoble in September and the average monthly rainfall is 89mm.

Grenoble September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:59 19:14
Monday, 15th September 2025 06:16 18:48
Tuesday, 30th September 2025 06:34 18:19

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