September · France
Best time to visit Saint-Denis in September Weather, crowds & prices
Weather in Saint-Denis in September
Average temperature 20°C, 19 mm of rain, about 27 days with 6+ hours of sunshine and 76% humidity — based on the five most recent complete years of ERA5 data (2021–2025).
September score
9.5/10
Ranked #2 of 12 months
- Avg temp
- 20°C
- Rainfall
- 19 mm
- Humidity
- 76%
- Days with 6h+ sun
- 27
- Crowd Density
- Moderate Crowds
- Average Expenses
- $$$ · Peak Season Rates ($$$)
September in Saint-Denis scores 9.5/10 for sightseeing and cultural travel - one of the top 12-month picks (#2). Expect around 20°C, 19 mm of rain, and roughly 27 days with 6+ hours of sunshine this month.
Saint-Denis is the capital of Reunion, with Creole houses, a natural history museum and a seafront promenade.
September in Saint-Denis — one of the year's strongest windows (2nd)
September averages 20°C (68°F) — pleasant for mornings and evenings on foot in the city, with a midday break when the sun is strongest.
Expect 19 mm of rain — occasional showers rather than washed-out days — alongside about 27 days with 6+ hours of sunshine and 11.9 daylight hours.
A 9.5/10 puts this among the year's best months in Saint-Denis (2nd of 12); only October scores higher, at 9.6/10.
Pack light clothing, a hat and real sun protection.
Plan for peak pricing, with crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.
Frequently asked
- What is the weather like in Saint-Denis in September?
- In September, Saint-Denis averages 20°C, 19 mm of rain, and about 27 days with 6+ hours of sunshine. Its climate-comfort score is 9.5/10.
- Is September a good time to visit Saint-Denis?
- September earns a 9.5/10 climate-comfort score. Use the year-round chart to weigh the weather against your budget and crowd preferences.
- How much does it rain in Saint-Denis in September?
- Expect about 19 mm of rain in September. Average humidity is 76% and there are about 27 days with 6+ hours of sunshine.
Curated in Saint-Denis
Tickets & experiences
Things to do in Saint-Denis
Saint-Denis, France. Live activities and tours from GetYourGuide, matched to this destination.