St Malo weather in August 2025

Expect 21°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in St Malo in August. Check more long-term weather averages for St Malo in August before you book your next holiday to France in 2025/2026.

  • 21°C maximum daytime temperature in August in St Malo21
    21°C max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in August in St Malo12
    12 days with some rainfall
  • 13°C minimum night-time temperature in August in St Malo13
    13°C min night temperature
  • 14 hours of daylight per day in August in St Malo14
    14 hours of daylight per day
  • No heat & humidity in August in St Malo0
    No heat & humidity
  • 48 mm monthly rainfall in August in St Malo48
    48 mm of monthly rainfall
  • UV (maximum) index 6 (High) in August in St Malo6
    6 (High) UV index
  • 18°C sea temperature in August in St Malo18
    18°C sea temperature

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The August weather guide for France (St Malo) 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 St Malo in August?

Daytime temperatures usually reach 21°C in St Malo in August, falling to 13°C at night.

How sunny is it in St Malo in August?

There are normally 7 hours of bright sunshine each day in St Malo in August - that's 51% of daylight hours.

How warm is the sea around St Malo in August?

The average sea temperature around St Malo in August is 18°C.

Does it rain in St Malo in August?

There are usually 12 days with some rain in St Malo in August and the average monthly rainfall is 48mm.

St Malo August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:42 20:46
Saturday, 16th August 2025 06:03 20:21
Sunday, 31st August 2025 06:24 19:52

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