French Guiana weather in September

Are you planning a trip to French Guiana in September and wondering what kind of weather to expect? This page has all the details you need.

What is the weather like in French Guiana in September?

September in French Guiana generally has very warm temperatures, with moderate precipitation.

The average maximum temperatures are very warm and range from 31°C (88°F) in Kourou to 34°C (94°F) in Maripasoula. These night and day temperatures are average and some days may be even warmer. So be prepared and dress for the heat.

Precipitation in September varies from moderate rainfall in Maripasoula with an average of 32mm (1.3 inches) to moderate rainfall in Cayenne with 65mm (2.6 inches). It is the driest month of the year in Kourou. It is also generally a sunny time of year with an average of 255 hours of sunshine in Kourou during the entire month.

For more details on the yearly weather and climate conditions, visit our French Guiana climate page. To learn more about the weather conditions in specific areas of French Guiana in September, check out the map below.

Where to go in French Guiana in September

Find the average weather conditions in September for the most popular destinations in French Guiana on the map below. Click on a destination dot for more detailed information.

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Legend perfect weather pleasant tolerable unpleasant poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20-29ºC / 68-84ºF and not too much precipitation (less than 90mm / 3.5inches a month).

Popular destinations in French Guiana

What is the weather like in September for the 5 most popular destinations in French Guiana?

Average weather in Kourou

In September Kourou generally has very high temperatures with maximum daytime temperatures around 31°C (88°F), minimum nighttime temperatures around 25°C (76°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

Kourou
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
31°C / 87°F 
24°C / 76°F 
230 hours 
110mm / 4.3" 
10 days 
31°C / 88°F 
25°C / 76°F 
255 hours 
54mm / 2.1" 
5 days 
October   >> October
>>  
31°C / 88°F 
25°C / 76°F 
251 hours 
64mm / 2.5" 
5 days 
Climate in Kourou

Average weather in Matoury

In September Matoury generally has very high temperatures with maximum daytime temperatures around 32°C (90°F), minimum nighttime temperatures around 24°C (75°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

Matoury
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
32°C / 89°F 
24°C / 75°F 
235 hours 
123mm / 4.8" 
9 days 
32°C / 90°F 
24°C / 75°F 
255 hours 
62mm / 2.4" 
4 days 
October   >> October
>>  
32°C / 90°F 
24°C / 75°F 
256 hours 
72mm / 2.8" 
4 days 
Climate in Matoury

Average weather in Cayenne

In September Cayenne generally has very high temperatures with maximum daytime temperatures around 32°C (90°F), minimum nighttime temperatures around 24°C (74°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

Cayenne
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
32°C / 89°F 
23°C / 74°F 
235 hours 
130mm / 5.1" 
9 days 
32°C / 90°F 
24°C / 74°F 
255 hours 
65mm / 2.6" 
5 days 
October   >> October
>>  
33°C / 91°F 
24°C / 74°F 
256 hours 
75mm / 2.9" 
4 days 
Climate in Cayenne

Average weather in Maripasoula

In September Maripasoula generally has very high temperatures with maximum daytime temperatures around 34°C (94°F), minimum nighttime temperatures around 23°C (73°F) and moderate monthly rainfall. So on average the conditions are tolerable that month.

Maripasoula
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
33°C / 91°F 
22°C / 72°F 
235 hours 
63mm / 2.5" 
12 days 
34°C / 94°F 
23°C / 73°F 
250 hours 
32mm / 1.3" 
7 days 
October   >> October
>>  
35°C / 94°F 
23°C / 73°F 
259 hours 
31mm / 1.2" 
7 days 
Climate in Maripasoula

Average weather in Saint Georges

In September Saint Georges generally has very high temperatures with maximum daytime temperatures around 33°C (92°F), minimum nighttime temperatures around 23°C (73°F) and moderate monthly rainfall. So on average the conditions are pleasant that month.

Saint Georges
Max temperature Max temp
Min temperature Min temp
Monthly sun hours Sun hours
Monthly rainfall Rainfall
Monthly rainy days Rainy days
Weather conditions Weather
<<   August August
<<  
32°C / 90°F 
23°C / 73°F 
235 hours 
102mm / 4" 
10 days 
33°C / 92°F 
23°C / 73°F 
246 hours 
42mm / 1.7" 
6 days 
October   >> October
>>  
34°C / 93°F 
23°C / 73°F 
249 hours 
47mm / 1.8" 
5 days 
Climate in Saint Georges

Is your destination not in the list? Have a look at other destinations in French Guiana.

Is September the best time to go to French Guiana?

In our opinion September is one of the best times to visit French Guiana with commonly pleasant weather in Kourou.

On average the best time to visit French Guiana is in September and October with generally pleasant weather in Kourou. The worst months are April, May, June, July and December that can have poor weather conditions.

Interested in more climate information?

We have much more information about the climate in French Guiana. Interested in the weather conditions in a specific month? Select the month below.

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  • Weather and climate has detailed information for every country in the world. Are you going to French Guiana? Get detailed historical weather averages for many cities in French Guiana.

    Not sure yet where to go? We now have a tool which recommends destinations that suit your ideal climate conditions. Find out where to go with our weather planner.