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The climate of French Guiana
The current climate in French Guiana features temperatures ranging from a high of 34°C to a low of 29°C throughout the year. The average yearly temperature is around 31°C. At night, temperatures in the colder months average around 23°C and in the warmer months around 24°C.
Average temperatures and precipitation
This chart shows the average monthly maximum and minimum temperatures (in degrees Celsius) and average monthly rainfall (in millimeters) for French Guiana.
Temperature records
The highest temperature recorded in French Guiana in recent years was 39°C in October 2023. The lowest daytime temperature recorded was 22°C in January 2023.
Rainfall amount
On average, French Guiana receives 3072 mm of precipitation each year. For comparison, New York gets 1142 mm of precipitation annually.
The climate in French Guiana is based on weather data from Cayenne. Other spots might have different weather. You can check out all destinations in French Guiana to get the full picture of the climate.
Best time to visit French Guiana?
The best time to visit French Guiana for mild to warm weather is September and October. You might get some rain, but the temperatures are just right to explore French Guiana.
Find affordable vacations to French Guiana
Climate Table of French Guiana
The climate table of French Guiana shows the average temperatures, rainfall, and UV index per month. The table provides an overview of the average day and night temperatures in degrees Celsius, the total amount of rainfall in millimeters, the total snowfall in centimeters, and the UV index for each month. Rainfall is always measured as water, even if it's snow or hail.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Temp. max (°C) | 29 | 29 | 30 | 30 | 30 | 31 | 31 | 32 | 33 | 34 | 32 | 31 |
| Temp. min (°C) | 23 | 24 | 24 | 24 | 24 | 23 | 23 | 23 | 23 | 23 | 24 | 24 |
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| Precipitation (mm) | 284 | 322 | 290 | 329 | 524 | 295 | 290 | 141 | 78 | 39 | 142 | 338 |
| UV Index | 7 | 7 | 8 | 7 | 7 | 7 | 8 | 9 | 9 | 9 | 8 | 7 |
Click on the month name to see more weather details, like daily averages, temperatures, and precipitation for the past years in that month.
Temperature charts
These charts display the average temperatures in French Guiana. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Average Temperature per Month in French Guiana
Yearly Temperature in French Guiana
Precipitation charts
These charts show the average amount of precipitation in French Guiana. Precipitation is always measured as water, even when it falls as snow or hail. The amount of precipitation is displayed in millimeters, while snowfall is shown in centimeters.
Average Precipitation per Month in French Guiana
Total Yearly Precipitation in French Guiana
UV index chart
This chart shows the average UV index per month in French Guiana. The UV index indicates the intensity of ultraviolet radiation and ranges from 0 to a maximum of 11.
Average UV Index per Month in French Guiana
Weather experiences in French Guiana
The weather in French Guiana is rated an average of 3,1 out of 5 stars by 10 visitors. Have you been to French Guiana? Share your weather experience to help other visitors.
Aaltje
From time to time there were showers that brought long-awaited relief. The average temperature was around 28°C, pleasantly warm.
David WeustinkThe heat and high humidity were unexpectedly intense. Heavy rain fell almost every day. Not ideal for a trip like this.
KasperSome days there were brilliant sunshine and temperatures around 28°C, while others were surprisingly rainy and humid. That didn't make the adventure any less entertaining.
Kiki OvermeerThe sun shines relentlessly and it rains heavily. Not ideal for a vacation.
Hugo de WeertIt was warm and sunny, with a little rain. It was very humid at times, but that is normal in this tropical climate.
LisaThe perfect mix for someone from a cold climate like me. The nights were pleasantly cool. In short, a great experience.
WouterMostly hot and humid with some light rain. Thunderstorms were frequent and the heat could be unbearable, but this is typical of a tropical climate.
Tamara MesmanAlthough there is sometimes intense heat, there are also heavy rainstorms. Therefore, it is advisable to always be prepared for both scenarios.
MaritApril in French Guiana was quite humid and hot. Despite frequent rain showers, there were also sunny moments. High humidity sometimes caused discomfort, especially during walks in nature.
AlidaExpect lots of rain; The sky is full of threatening clouds. You may feel the tropical heat. Bring light clothing.
Have you been to French Guiana?
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Average weather in French Guiana by month
Click on a month below to see detailed weather info for French Guiana. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.