Average temperature in September is 23.2 °C
Average daytime temperature is 26.4 °C
Average night temperature is 20.1 °C
Absolute maximum temperature: 28.2 °C
Absolute minimum temperature: 18.1 °C
Number of sunny days: 11
Number of rainy days: 19
Number of snow days:
Precipitation sum: 25 mm
* Weather data for Saint-Denis Réunion is based on climate observations for 2023 year
| September (°C) | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Maximum temperature | 25.5 | 25.7 | 25 | 25.8 | 25 | 25.4 | 27.1 | 25.2 | 26.9 | 26.9 | 27.1 | 27.7 | 25.4 | 24.7 | 25.6 | 26.7 | 26 | 27.1 | 27.4 | 27.6 | 27.5 | 25.6 | 27.3 | 26 | 26.2 | 26.8 | 28.2 | 26 | 26 | 27.8 |
| Apparent max temperature | 26.1 | 26.7 | 25.8 | 26.8 | 25.5 | 27.1 | 29.2 | 26.2 | 28.2 | 27.8 | 27.5 | 29.2 | 28 | 26.9 | 27.2 | 27.2 | 27.3 | 27.9 | 28.3 | 28.3 | 28 | 27.5 | 27.7 | 26.3 | 26.9 | 26.4 | 28.1 | 26.4 | 26.4 | 29.3 |
| Mean temperature | 22.8 | 22.9 | 22.4 | 22.8 | 22 | 22.1 | 22.9 | 22.3 | 23.2 | 23.1 | 23.5 | 24.4 | 22.8 | 21.9 | 22.5 | 23.5 | 23.2 | 24.2 | 24.2 | 24.4 | 24.3 | 23.1 | 23.2 | 23 | 23.3 | 23.6 | 24.1 | 23.3 | 23.1 | 24.3 |
| Apparent mean temperature | 21 | 20.6 | 20.3 | 20.5 | 19.7 | 18.3 | 19 | 18.9 | 18.8 | 20.4 | 20.4 | 21.3 | 21.6 | 18.8 | 18.5 | 20.7 | 21.2 | 21.1 | 22 | 21.1 | 21.8 | 21.5 | 19 | 21 | 20.3 | 19.7 | 21.1 | 20.4 | 20.8 | 21.4 |
| Minimum temperature | 20 | 20.2 | 20.1 | 20.3 | 19.3 | 18.6 | 19.1 | 18.1 | 19 | 19.9 | 20 | 21.6 | 20 | 18.3 | 18.5 | 21 | 20.7 | 21.1 | 21.4 | 21.3 | 21.5 | 20.6 | 19.2 | 20.4 | 20.6 | 20.1 | 20.5 | 20.8 | 20.1 | 21.2 |
| Apparent min temperature | 22.9 | 23 | 22.4 | 23.4 | 22.7 | 22.4 | 24.3 | 24 | 23.9 | 23.5 | 23.4 | 25.4 | 25 | 23.5 | 22.9 | 23.4 | 23.7 | 24.5 | 24.4 | 24.4 | 24.9 | 24.6 | 23.1 | 23.2 | 23.5 | 22.8 | 23.8 | 23.3 | 23.5 | 24.9 |
| September | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight duration (h) | 11.7 | 11.7 | 11.7 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.8 | 11.9 | 11.9 | 11.9 | 11.9 | 11.9 | 12 | 12 | 12 | 12 | 12 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.3 |
| Sunshine duration (h) | 10.8 | 10.8 | 10.8 | 10.9 | 10.5 | 10.9 | 10.3 | 7.9 | 10.9 | 10.9 | 11 | 11.1 | 7.5 | 11.2 | 11.2 | 11.2 | 10.7 | 11.3 | 11.3 | 11.1 | 11.3 | 8.8 | 11.4 | 11.3 | 11.4 | 11.5 | 11.5 | 11.5 | 11.3 | 11.5 |
| Precipitation (mm) | 1.7 | 1.2 | 1 | 1.2 | 0 | 0 | 1.2 | 0.1 | 0 | 0.1 | 0 | 4.1 | 0.6 | 0.6 | 0 | 0.1 | 2.1 | 0 | 0 | 0.1 | 0.1 | 6 | 0.6 | 0.5 | 0 | 0 | 0 | 0 | 2.6 | 1.6 |
| Precipitation hours | 4 | 8 | 6 | 8 | 0 | 0 | 4 | 1 | 0 | 1 | 0 | 8 | 5 | 6 | 0 | 1 | 10 | 0 | 0 | 1 | 1 | 9 | 4 | 5 | 0 | 0 | 0 | 0 | 11 | 11 |
| Wind speed (m/s) | 19.4 | 22.7 | 23.4 | 21.4 | 20.8 | 16.7 | 14.6 | 15.5 | 17.6 | 20.4 | 22.9 | 21.4 | 18.8 | 18.4 | 20 | 22.3 | 20.7 | 21.9 | 22.2 | 23.2 | 21.7 | 19.7 | 26 | 24.5 | 20.3 | 27.7 | 24.3 | 23.2 | 21.5 | 21.2 |
In September 2023, the highest daytime temperature in Saint-Denis was 28.2°C.
While the minimum temperature at night dropped to 18.1°C.
The average nighttime and daytime temperatures during September in Saint-Denis are 20.1°C and 26.4°C respectively.
The precipitation sum in September is about 25 mm.