French Guiana in september: average Weather, Temperature and Climate, Where to go?
Weather in French Guyana in september 2025
Here, find the the weather forecast for the month of september for most popular cities in French Guiana. These datas are probabilities for the month of september from weather reports for over 10 years. The percentage indicates the possibility of having the weather mentioned.
Average weather in september in Cayenne
good weather UV index: 7
Weather at 6am
77°F
Partly Cloudy
49% of time
22%
17%
9%
Weather at 12pm
90°F
Clear/Sunny
66% of time
18%
16%
1%
Weather at 6pm
85°F
Clear/Sunny
60% of time
24%
13%
5%
Weather at 3am
77°F
47%
26%
18%
6%
Where to go in French Guyana in september?
Where to go in French Guyana in september: destination map
perfect weather
good
tolerable
bad
very bad
Where should you go in French Guyana in september when it comes to the weather?
Remember:
The climate in French Guyana in september is good across the board.
Good news: It is not ideal 100%, but the weather in French Guiana in september is, according to seasonal norms, pretty good in Maripasoula, Saint-Laurent-du-Maroni and Awala-Yalimapo. I allows to enjoy vacation in these cities. And even why not take a little time to enjoy the hotel pool!
If you do not go the sun and blue sky, but, for example for cultural tours or hiking, the cities of Sinnamary, Kourou, Roura and Cayenne have a ok but correct weather for this kind of activity in september.
Climate in French Guyana in september
Climate in Cayenne in september
In the month of september, the mean temperature in Cayenne is 85°F (maximum temperature is 90°F and minimum temperature is 77°F). The climate is very warm in that locality in september. With about 2.4in over 4 days, the rain will not be a problem throughout your holidays.
With a correct climate, september is okay (but not the best month) for traveling in that area.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 90°F | ||
| Lowest temperature | 77°F | ||
| Sea temperature | 84°F | ||
| Rainfall | 2.4in | ||
| Number of days with rainfall | 4 day(s) (13%) | ||
| Humidity | 90% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 27% | ||
| Length of day | 12:08 | ||
| Our opinion at whereandwhen.net | good |
Climate in Kourou in september
In the month of september, maximum temperature is 88°F and minimum temperature is 77°F (for an average temperature of 83°F). The climate is burning here in september. With barely 3.1in over 5 days, rainfall is infrequent for your journey.
With proper weather, september is okay (but not the best month) for traveling in this locality.
| September | |||
| Average temperature | 83°F | ||
| Highest temperature | 88°F | ||
| Lowest temperature | 77°F | ||
| Sea temperature | 84°F | ||
| Rainfall | 3.1in | ||
| Number of days with rainfall | 5 day(s) (18%) | ||
| Humidity | 89% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 27% | ||
| Length of day | 12:09 | ||
| Our opinion at whereandwhen.net | good |
Climate in Mana in september
In september, maximum temperature is 94°F and minimum temperature is 74°F (for an average temperature of 83°F). The climate is very warm in this location in september. With 2.8in over 5 days, you risk getting wet slightly during your vacations. But this is pretty moderate and you will not be too bothered by it.
With good weather conditions, september is an advisable month to go in this city in French Guiana.
| September | |||
| Average temperature | 83°F | ||
| Highest temperature | 94°F | ||
| Lowest temperature | 74°F | ||
| Sea temperature | 83°F | ||
| Rainfall | 2.8in | ||
| Number of days with rainfall | 5 day(s) (15%) | ||
| Humidity | 97% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 36% | ||
| Length of day | 12:08 | ||
| Our opinion at whereandwhen.net | good |
Climate in Maripasoula in september
In the month of september, maximum temperature is 95°F and minimum temperature is 70°F (for an average temperature of 83°F). The climate is very warm here in the month of september. With 3.7in over 5 days, rain may occur during your trip. But this is rather reasonably and it is only of temporary showers.
With a good weather, september is a good month to go in this city in French Guiana.
| September | |||
| Average temperature | 83°F | ||
| Highest temperature | 95°F | ||
| Lowest temperature | 70°F | ||
| Rainfall | 3.7in | ||
| Number of days with rainfall | 5 day(s) (17%) | ||
| Humidity | 99% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 42% | ||
| Length of day | 12:08 | ||
| Our opinion at whereandwhen.net | good |
Climate in Apatou in september
In september, maximum temperature is 94°F and minimum temperature is 74°F (for an average temperature of 83°F). The climate is very warm here in september. With 2.8in over 5 days, rainfall can happen throughout your holidays. But this is rather moderate and you will not be too bothered by it.
With a good weather, the month of september is an advisable month to go in Apatou.
| September | |||
| Average temperature | 83°F | ||
| Highest temperature | 94°F | ||
| Lowest temperature | 74°F | ||
| Rainfall | 2.8in | ||
| Number of days with rainfall | 5 day(s) (15%) | ||
| Humidity | 97% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 36% | ||
| Length of day | 12:08 | ||
| Our opinion at whereandwhen.net | good |
All cities in French Guyana in september
| Cayenne in september | good weather |
| Kourou in september | good weather |
| Mana in september | good weather |
| Maripasoula in september | good weather |
| Apatou in september | good weather |
| Awala-Yalimapo in september | good weather |
| Cacao in september | good weather |
| Camopi in september | good weather |
| Îles du Salut in september | good weather |
| Iracoubo in september | good weather |
| Macouria in september | good weather |
| Montagne des Singes in september | good weather |
| Ouanary in september | good weather |
| Régina in september | good weather |
| Rémire-Montjoly in september | good weather |
| Roura in september | good weather |
| Saint George de l’Oyapock in september | good weather |
| Saint-Laurent-du-Maroni in september | good weather |
| Saül in september | good weather |
| Sinnamary in september | good weather |
Weather data for French Guiana in september:
Weather data for French Guiana in september is derived from an average of the weather forecast since 2009 in French Guyana. There is a margin of error and these forecasts are to be considered as general information only. The weather in French Guyana can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to French Guyana.