Average annual temperature is 25.9 °C
Absolute maximum temperature: 38.6 °C
Absolute minimum temperature: 19.3 °C
Number of sunny days: 16 days
Number of rainy days: 349 days
Look at detailed online map of Saint-Jean
* Weather data for Saint-Jean 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) | 29.8 | 29.4 | 32.3 | 32.0 | 32.0 | 32.2 | 32.1 | 34.2 | 37.1 | 38.6 | 36.1 | 34.1 |
| Average daytime temperature (°C) | 27.7 | 27.5 | 29.9 | 29.4 | 29.5 | 30.7 | 30.4 | 32.4 | 34.4 | 35.5 | 33.3 | 31.3 |
| Average temperature (°C) | 23.9 | 24.2 | 25.5 | 25.3 | 25.3 | 25.3 | 25.5 | 26.8 | 27.7 | 28.3 | 27.2 | 26.1 |
| Average night temperature (°C) | 21.6 | 22.1 | 22.5 | 22.7 | 23.0 | 22.5 | 22.7 | 23.2 | 23.4 | 24.0 | 23.4 | 22.8 |
| Absolute minimum temperature (°C) | 19.3 | 21.0 | 20.4 | 21.6 | 22.5 | 21.7 | 21.1 | 21.7 | 22.3 | 22.7 | 21.7 | 21.7 |
| 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) | 11.8 | 12.0 | 12.1 | 12.2 | 12.4 | 12.4 | 12.4 | 12.3 | 12.1 | 12.0 | 11.9 | 11.8 |
| 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 | 5.5 | 9.6 | 7.5 | 6.3 | 7.6 | 9.2 | 10.8 | 10.6 | 10.7 | 10.5 | 9.4 |
| Precipitation (mm) | 414 | 534 | 91 | 414 | 570 | 327 | 295 | 119 | 64 | 61 | 94 | 163 |
| Sunny days | 1 | 0 | 1 | 2 | 0 | 0 | 0 | 3 | 5 | 3 | 0 | 1 |
| Rainy days | 30 | 28 | 30 | 28 | 31 | 30 | 31 | 28 | 25 | 28 | 30 | 30 |
| Snow days | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
The largest precipitation sum in Saint-Jean is at