Saint-Denis weather in September 2025

Expect 72°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Saint-Denis in September. Check more long-term weather averages for Saint-Denis in September before you book your next holiday to Reunion in 2025/2026.

  • 72°F maximum daytime temperature in September in Saint-Denis72
    72°F max day temperature
  • 7 hours of sunshine per day
  • 12 days with some rainfall in September in Saint-Denis12
    12 days with some rainfall
  • 59°F minimum night-time temperature in September in Saint-Denis59
    59°F min night temperature
  • 12 hours of daylight per day in September in Saint-Denis12
    12 hours of daylight per day
  • No heat & humidity in September in Saint-Denis0
    No heat & humidity
  • 1.9 inches monthly rainfall in September in Saint-Denis1.9
    1.9 inches of monthly rainfall
  • UV (maximum) index 10 (Very High) in September in Saint-Denis10
    10 (Very High) UV index
  • 73°F sea temperature in September in Saint-Denis73
    73°F sea temperature

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The September 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)  |  Imperial (°F)

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How hot is it in Saint-Denis in September?

Daytime temperatures usually reach 72°F in Saint-Denis in September, falling to 59°F at night.

How sunny is it in Saint-Denis in September?

There are normally 7 hours of bright sunshine each day in Saint-Denis in September - that's 55% of daylight hours.

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

The average sea temperature around Saint-Denis in September is 73°F.

Does it rain in Saint-Denis in September?

There are usually 12 days with some rain in Saint-Denis in September and the average monthly rainfall is 1.9 inches.

Saint-Denis September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 06:27 18:09
Monday, 15th September 2025 06:14 18:13
Tuesday, 30th September 2025 06:00 18:16

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