Rennes weather in August 2025

Expect 23°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Rennes in August. Check more long-term weather averages for Rennes in August before you book your next holiday to France in 2025/2026.

  • 23°C maximum daytime temperature in August in Rennes23
    23°C max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in August in Rennes12
    12 days with some rainfall
  • 13°C minimum night-time temperature in August in Rennes13
    13°C min night temperature
  • 14 hours of daylight per day in August in Rennes14
    14 hours of daylight per day
  • No heat & humidity in August in Rennes0
    No heat & humidity
  • 43 mm monthly rainfall in August in Rennes43
    43 mm of monthly rainfall
  • UV (maximum) index 6 (High) in August in Rennes6
    6 (High) UV index

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The August weather guide for France (Rennes) 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 Rennes in August?

Daytime temperatures usually reach 23°C in Rennes in August, falling to 13°C at night.

How sunny is it in Rennes in August?

There are normally 7 hours of bright sunshine each day in Rennes in August - that's 50% of daylight hours.

Does it rain in Rennes in August?

There are usually 12 days with some rain in Rennes in August and the average monthly rainfall is 43mm.

Rennes August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:43 20:43
Saturday, 16th August 2025 06:03 20:18
Sunday, 31st August 2025 06:23 19:50

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