Average annual temperature is 26.3 °C
Absolute maximum temperature: 38.1 °C
Absolute minimum temperature: 19.9 °C
Number of sunny days: 45 days
Number of rainy days: 320 days
Look at detailed online map of Vieux Grand-Santi
* Weather data for Vieux Grand-Santi French Guiana is based on climate observations for 2026 year
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Absolute maximum temperature (°C) | 30.8 | 30.8 | 32.9 | 33.1 | 33.1 | 32.8 | 32.4 | 35.2 | 37.5 | 38.1 | 37.5 | 34.6 |
| Average daytime temperature (°C) | 28.8 | 28.3 | 30.8 | 30.2 | 30.6 | 30.9 | 30.7 | 32.9 | 34.9 | 36.0 | 34.9 | 32.1 |
| Average temperature (°C) | 24.1 | 24.1 | 25.4 | 25.3 | 25.6 | 25.8 | 25.8 | 27.1 | 28.3 | 29.1 | 28.1 | 26.5 |
| Average night temperature (°C) | 21.7 | 22.3 | 22.2 | 22.6 | 23.0 | 22.9 | 22.7 | 23.3 | 23.8 | 24.5 | 24.1 | 23.6 |
| Absolute minimum temperature (°C) | 19.9 | 21.2 | 21.0 | 21.3 | 22.3 | 22.1 | 21.3 | 22.2 | 21.7 | 23.5 | 22.8 | 22.8 |
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daylight maximum duration (h) | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 |
| Daylight mean duration (h) | 11.9 | 12.0 | 12.1 | 12.2 | 12.3 | 12.4 | 12.3 | 12.3 | 12.1 | 12.0 | 11.9 | 11.9 |
| Daylight minimum duration (h) | 11.0 | 11.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 12.0 | 11.0 | 11.0 | 11.0 |
| Sunshine mean duration (h) | 7.2 | 5.6 | 9.8 | 7.4 | 7.6 | 8.8 | 9.7 | 10.7 | 10.6 | 10.4 | 10.3 | 9.3 |
| Precipitation (mm) | 450 | 481 | 250 | 455 | 465 | 254 | 285 | 128 | 31 | 76 | 92 | 151 |
| Sunny days | 1 | 0 | 1 | 2 | 0 | 0 | 0 | 8 | 14 | 14 | 3 | 2 |
| Rainy days | 30 | 28 | 30 | 28 | 31 | 30 | 31 | 23 | 16 | 17 | 27 | 29 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Vieux Grand-Santi is at