Saint-Denis Weather in September
What's the weather like in Saint-Denis (Réunion) in September 2025?
The climate in Saint-Denis during September can be summarized as warm and reasonably dry.
September is in the spring in Saint-Denis and is typically the 3rd coldest month of the year. Daytime maximum temperatures average around 22°C (72°F), whilst at night 15°C (58°F) is normal.
| Daytime temperature | 22.4°C 72.3°F |
|---|---|
| Nightly temperature | 14.6°C 58.3°F |
| Average temperature | 18.5°C 65.3°F |
| Daily sunshine | 7 hrs |
| Avg rainfall | 47 mm 1.9 ins |
| Rainy days | 13 days |
| Sea temperature | 23.5°C 74.4°F |
| Humidity | 80% |
| Windspeed | 14kph 9 mph |
On average September is the driest month of the year in Saint-Denis with around 47mm 1.9 inches of rain making it a reasonably dry time to visit. This rainfall is typically spread over 13 days, although this may vary considerably.
On the flip side this corresponds to an average of 7 hours of sunshine per day.
September temperatures in Saint-Denis
September rainfall
September hourly sunshine
The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Saint-Denis in September 2025.
Other monthly averages
Best places to visit in September
Saint-Denis weather stats
| Hottest month: | February | 26.6°C 79.9°F |
|---|---|---|
| Driest month: | September | 47mm 1.9ins |
| Sunniest month: | May | 6.8hrs |
| Coldest month: | August | 21.2°C 70.2°F |
| Wettest month: | January | 254mm 10ins |
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