Saint-Denis weather in August 2025

Expect 21°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Saint-Denis in August. Check more long-term weather averages for Saint-Denis in August before you book your next holiday to Reunion in 2025/2026.

  • 21°C maximum daytime temperature in August in Saint-Denis21
    21°C max day temperature
  • 6 hours of sunshine per day
  • 16 days with some rainfall in August in Saint-Denis16
    16 days with some rainfall
  • 14°C minimum night-time temperature in August in Saint-Denis14
    14°C min night temperature
  • 11 hours of daylight per day in August in Saint-Denis11
    11 hours of daylight per day
  • No heat & humidity in August in Saint-Denis0
    No heat & humidity
  • 67 mm monthly rainfall in August in Saint-Denis67
    67 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Saint-Denis8
    8 (Very High) UV index
  • 23°C sea temperature in August in Saint-Denis23
    23°C sea temperature

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The August weather guide for Reunion (Saint-Denis) 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 Saint-Denis in August?

Daytime temperatures usually reach 21°C in Saint-Denis in August, falling to 14°C at night.

How sunny is it in Saint-Denis in August?

There are normally 6 hours of bright sunshine each day in Saint-Denis in August - that's 54% of daylight hours.

How warm is the sea around Saint-Denis in August?

The average sea temperature around Saint-Denis in August is 23°C.

Does it rain in Saint-Denis in August?

There are usually 16 days with some rain in Saint-Denis in August and the average monthly rainfall is 67mm.

Saint-Denis August sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 06:49 18:00
Saturday, 16th August 2025 06:40 18:05
Sunday, 31st August 2025 06:28 18:09

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