French Guiana has a tropical climate, with average temperatures ranging from 25 to 30°C throughout the year. Because it is located on the equator, the country experiences a wet and dry season.
Wet season
The wet season lasts from December until May, with heavy rain often falling.
Dry Season
The dry season lasts from June to November, with cooler and drier weather. But even during the dry season, there are occasional heavy downpours.
Humidity
The humidity is high throughout the year, and can reach up to 90% during the wet season and around 70% during the dry season.
Conclusion
In general, the climate in French Guiana is hot, humid, and rainy.