Average temperature in September is 27.9 °C
Average daytime temperature is 31.1 °C
Average night temperature is 25.1 °C
Absolute maximum temperature: 32.4 °C
Absolute minimum temperature: 23.3 °C
Number of sunny days: 4
Number of rainy days: 26
Number of snow days:
Precipitation sum: 41 mm
* Weather data for Cayenne French Guiana is based on climate observations for 2023 year
| Settembre (°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 | 31 | 30.7 | 31.8 | 30.6 | 30.6 | 31.3 | 30.5 | 31.6 | 31 | 30.6 | 30.9 | 31.4 | 31.2 | 31 | 31.3 | 31.6 | 31.8 | 30.6 | 29.7 | 30 | 31.8 | 31.4 | 31.3 | 31.5 | 31.3 | 31 | 32.4 | 31.5 | 31.1 | 31.6 |
| Apparent max temperature | 36.6 | 34.9 | 35.4 | 35.8 | 35.5 | 36.5 | 34.2 | 35 | 35.9 | 34.5 | 35.8 | 35 | 35.5 | 36.3 | 36.7 | 36.6 | 35.2 | 36.8 | 36.2 | 35.5 | 36.8 | 36.8 | 37.5 | 38 | 38.4 | 37.9 | 37.7 | 36.1 | 35.1 | 36.9 |
| Mean temperature | 28.2 | 27.8 | 27.3 | 27.4 | 27.7 | 27.7 | 27.4 | 27.9 | 27.8 | 28.1 | 27.8 | 28.2 | 27.5 | 27.7 | 28.2 | 28.2 | 28.3 | 27.7 | 26.5 | 27.6 | 27.9 | 28.2 | 28.4 | 28.6 | 27.1 | 28.2 | 28.4 | 28.6 | 27.8 | 28.1 |
| Apparent mean temperature | 30.7 | 29.9 | 26.9 | 28.6 | 29.7 | 29.6 | 28 | 29.3 | 29.5 | 29.9 | 29.8 | 29.9 | 28.2 | 29.5 | 30.8 | 31 | 29.7 | 30.7 | 29.9 | 30.3 | 29.4 | 30.6 | 31.2 | 31.1 | 28.5 | 30.5 | 29.3 | 30.2 | 27.6 | 29.2 |
| Minimum temperature | 25.8 | 24.9 | 23.3 | 24.3 | 25 | 24.6 | 23.6 | 25.2 | 25.4 | 26.2 | 26 | 25.6 | 24 | 25.3 | 25.9 | 26 | 25.1 | 26 | 24.4 | 24.9 | 24.4 | 26.3 | 26.1 | 25.4 | 23.9 | 25.2 | 24.6 | 25.9 | 23.9 | 24.6 |
| Apparent min temperature | 32.9 | 31.9 | 30.8 | 31.4 | 32.1 | 32.3 | 31.3 | 31.4 | 31.6 | 31.9 | 31.8 | 31.8 | 31.4 | 31.9 | 33 | 32.8 | 32.2 | 32.6 | 31.8 | 33 | 32.6 | 32.8 | 33.4 | 33.9 | 32.5 | 33.5 | 32.7 | 32.4 | 31.1 | 32.6 |
| Settembre | 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) | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.2 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 | 12.1 |
| Sunshine duration (h) | 11.1 | 11.1 | 11.1 | 11.1 | 11.1 | 11 | 11 | 11.1 | 11.1 | 11.1 | 8.8 | 11.1 | 11.1 | 11.1 | 11.1 | 10.3 | 11.1 | 11 | 11 | 11.1 | 11.1 | 11.1 | 11 | 11.1 | 11.2 | 11.2 | 11.1 | 11.1 | 11.3 | 11.2 |
| Precipitation (mm) | 0 | 0.2 | 0 | 1.3 | 0.3 | 0.2 | 0.1 | 1.4 | 1.4 | 0.6 | 1.4 | 0.8 | 0 | 0.3 | 0.7 | 1 | 0 | 2.5 | 2.6 | 3.1 | 0.7 | 2 | 2 | 1 | 13 | 1.8 | 0.4 | 0.9 | 0.4 | 0.5 |
| Precipitation hours | 0 | 2 | 0 | 3 | 3 | 2 | 1 | 5 | 7 | 5 | 5 | 3 | 0 | 3 | 2 | 4 | 0 | 6 | 9 | 7 | 5 | 7 | 7 | 8 | 6 | 5 | 2 | 6 | 2 | 2 |
| Wind speed (m/s) | 16.9 | 20.2 | 19.8 | 18.4 | 17.2 | 14.9 | 19.5 | 24.9 | 19.9 | 20.2 | 18.2 | 23.1 | 20 | 17.6 | 17.7 | 17.3 | 20.9 | 15 | 14.9 | 10.8 | 16.5 | 19.2 | 14.8 | 15.3 | 13.9 | 15.3 | 20.7 | 23.5 | 23.5 | 18.1 |
In September 2023, the highest daytime temperature in Cayenne was 32.4°C.
While the minimum temperature at night dropped to 23.3°C.
The average nighttime and daytime temperatures during September in Cayenne are 25.1°C and 31.1°C respectively.
The precipitation sum in September is about 41 mm.