Weathermondo.comFrench Guiana climate and temperatures
The climate of French Guiana is a tropical monsoon climate (Köppen: Am), characterized by a very wet season and a short dry period. Monthly temperatures range from a minimum of 29°C in January to a maximum of 34°C in October. The average annual temperature is around 31°C.
During the colder months, nighttime temperatures average around 23°C, while in the warmer months they average about 24°C.
Popular destinations in French Guiana
View all destinations in French GuianaClimate table of French Guiana
The climate table below gives you a clear overview of the climate in French Guiana by month, from average temperatures and rainfall to UV levels. This makes it easy to see when the weather best suits your travel plans.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| Temp. max (°C) | 14 | 16 | 17 | 19 | 23 | 27 | 30 | 30 | 27 | 23 | 18 | 16 |
| Temp. min (°C) | 6 | 7 | 9 | 11 | 15 | 19 | 22 | 22 | 19 | 15 | 10 | 7 |
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| Rainfall (mm) | 46 | 34 | 46 | 64 | 43 | 23 | 22 | 75 | 77 | 84 | 61 | 25 |
| UV index | 4 | 5 | 6 | 7 | 8 | 8 | 8 | 8 | 6 | 5 | 4 | 4 |
Best time to visit French Guiana
The best time to visit French Guiana is January, February, March, April en May. During this period, temperatures are usually pleasant to warm and there is relatively little rainfall. Between January and May, average high temperatures range roughly from 29°C to 30°C, while rainfall remains limited. The warmest month is October, with an average daytime temperature of around 34°C. The driest month is October, with about 39 mm of rainfall, while May is usually the wettest month of the year, with approximately 524 mm. Snow plays virtually no role in the climate here.
Average temperature per month
This chart shows the average daytime (maximum) and nighttime (minimum) temperatures per month in French Guiana. The figures are based on climate data from recent years and are presented in degrees Celsius, so you can clearly see the temperature range for each month.
Average rainfall per month
This chart shows the average monthly rainfall in French Guiana. The figures are based on long-term climate data and are displayed in millimeters, so you can immediately see which months are drier or wetter.
Average UV index per month
This chart shows the average monthly sun intensity in French Guiana. The UV index ranges from 0 (no UV radiation) to 11+ (extreme). A higher UV index means you can burn more quickly, making proper sun protection increasingly important.
Average annual temperature
This chart shows the average annual temperature in French Guiana based on data from the past ten years. It allows you to see at a glance how the climate is evolving and whether there are clear warming trends.
Average annual rainfall
This chart shows the average annual rainfall in French Guiana over the past ten years. It allows you to see at a glance how much rain falls each year and whether there are clear fluctuations between the years.
Weather experiences in French Guiana
The weather in French Guiana is rated an average of 4.3 out of 5 stars by 8 visitors. Have you been to French Guiana? Share your experience with the weather to help other visitors plan their trip.
Average weather per month
Click on a month below and discover what the weather in French Guiana is typically like. For each period, you can instantly see the average temperature, rainfall, wind, and UV index. Thanks to years of historical weather data, you’ll know exactly what to expect during your trip.