Average annual temperature is 14.5 °C
Absolute maximum temperature: 22.3 °C
Absolute minimum temperature: 4.7 °C
Number of sunny days: 44 days
Number of rainy days: 321 days
Look at detailed online map of Grand Bassin
* Weather data for Grand Bassin Réunion is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 20.4 | 21.5 | 22.3 | 20.3 | 19.3 | 17.5 | 17.5 | 17.6 | 18.5 | 21.8 | 20.6 | 21.3 |
| Average daytime temperature (°C) | 18.8 | 19.5 | 19.6 | 18.6 | 17.2 | 15.4 | 15.5 | 15.4 | 16.8 | 19.0 | 18.3 | 19.5 |
| Average temperature (°C) | 16.4 | 16.6 | 16.5 | 15.9 | 14.5 | 12.2 | 11.5 | 12.1 | 12.5 | 14.7 | 15.0 | 16.1 |
| Average night temperature (°C) | 14.4 | 13.7 | 13.9 | 13.8 | 12.1 | 9.3 | 8.0 | 9.4 | 8.5 | 11.0 | 11.7 | 12.9 |
| Absolute minimum temperature (°C) | 12.3 | 10.1 | 10.3 | 9.9 | 7.9 | 4.7 | 4.9 | 6.0 | 6.8 | 7.5 | 8.7 | 10.1 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 13.0 | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 | 13.0 |
| Daylight mean duration (h) | 13.3 | 12.8 | 12.2 | 11.6 | 11.1 | 10.9 | 11.0 | 11.4 | 12.0 | 12.6 | 13.1 | 13.4 |
| Daylight minimum duration (h) | 13.0 | 12.0 | 11.0 | 11.0 | 10.0 | 10.0 | 10.0 | 11.0 | 11.0 | 12.0 | 12.0 | 13.0 |
| Sunshine mean duration (h) | 9.2 | 10.4 | 10.0 | 8.8 | 8.9 | 9.5 | 9.3 | 9.4 | 10.8 | 10.5 | 9.5 | 9.8 |
| Precipitation (mm) | 601 | 268 | 186 | 198 | 116 | 80 | 81 | 119 | 52 | 92 | 254 | 248 |
| Sunny days | 0 | 1 | 0 | 1 | 3 | 7 | 8 | 4 | 8 | 10 | 0 | 2 |
| Rainy days | 31 | 27 | 31 | 29 | 28 | 23 | 23 | 27 | 22 | 21 | 30 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Grand Bassin is at