Saint-Barthelemy in september: average Weather, Temperature and Climate, Where to go?
Weather in Saint-Barthelemy in september 2025
Below, check out the weather forecast for the month of september for most popular cities in Saint-Barthelemy. These predictions are statistics for september from weather reports for many years. The percentage indicates the probability of having the weather mentioned.
Average weather in september in Gustavia
tolerable weather UV index: 7
Weather at 6am
85°F
Moderate rain at times
40% of time
34%
12%
11%
Weather at 12pm
85°F
Partly Cloudy
34% of time
31%
18%
12%
Weather at 6pm
85°F
Moderate rain at times
35% of time
29%
20%
14%
Weather at 3am
85°F
43%
33%
13%
7%
Where to go in Saint-Barthelemy in september?
Where to go in Saint-Barthelemy in september: destination map
perfect weather
good
tolerable
bad
very bad
Where should you go in Saint-Barthelemy in september when it comes to the weather?
Remember:
The climate in Saint-Barthelemy in september is tolerable across the board.
You are lucky: It is not perfect, however, the weather in Saint-Barthelemy in september is, on average, pretty good in Colombier (Saint-Barth). I allows to savor sightseeing in this city. And even why not take a little time to enjoy the weather for... just be relax!
If you do not go for the sun or the beach, but, for example to go sightseeing, the cities of Chevreau Island, Nikki Beach, Grand Cul-de-Sac, Gustavia, Fourchue Island and Frégate Island have a quite correct weather for this kind of activity in september.
Climate in Saint-Barthelemy in september
Climate in Gustavia in september
In the month of september, maximum temperature is 86°F and minimum temperature is 83°F (for an average temperature of 85°F). The climate is very warm in that area in this month. With 8.3in over 11 days, rain may occur for your stay. But this is rather reasonably and it will not be continuous.
With a correct weather, september is okay (but not the best month) for traveling in that area in Saint-Barthelemy.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 83°F | ||
| Sea temperature | 85°F | ||
| Rainfall | 8.3in | ||
| Number of days with rainfall | 11 day(s) (38%) | ||
| Humidity | 78% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 39% | ||
| Length of day | 12:14 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Grand Cul-de-Sac in september
In the month of september, maximum temperature is 86°F and minimum temperature is 83°F (for an average temperature of 85°F). The climate is burning there in the month of september. With 8.3in over 11 days, rainfall can happen for your trip. But this is rather reasonably and you will not be too bothered by it.
With proper weather, the month of september is okay (but not the best time) for traveling in Grand Cul-de-Sac in Saint-Barthelemy.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 83°F | ||
| Sea temperature | 85°F | ||
| Rainfall | 8.3in | ||
| Number of days with rainfall | 11 day(s) (38%) | ||
| Humidity | 78% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 39% | ||
| Length of day | 12:14 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Colombier (Saint-Barth) in september
In the month of september, maximum temperature is 86°F and minimum temperature is 83°F (for an average temperature of 85°F). The climate is burning in this city in the month of september. With 8.3in over 11 days, you risk getting wet slightly throughout your holidays. But this is moderate and it is only of temporary showers.
With a correct climate, the month of september is okay (but not good month) for traveling in this locality.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 83°F | ||
| Sea temperature | 85°F | ||
| Rainfall | 8.3in | ||
| Number of days with rainfall | 11 day(s) (38%) | ||
| Humidity | 78% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 39% | ||
| Length of day | 12:14 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Chevreau Island in september
In the month of september, the mean temperature in Chevreau Island is 85°F (maximum temperature is 86°F and minimum temperature is 83°F). The climate is very warm in that locality in september. With 8.3in over 11 days, rain may occur throughout your trip. But this is pretty reasonably and it will not be continuous.
With a correct climate, the month of september is okay (but not good time) for traveling in Chevreau Island in Saint-Barthelemy.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 83°F | ||
| Sea temperature | 86°F | ||
| Rainfall | 8.3in | ||
| Number of days with rainfall | 11 day(s) (38%) | ||
| Humidity | 78% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 39% | ||
| Length of day | 12:14 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Fourchue Island in september
In september, the mean temperature in Fourchue Island is 85°F (maximum temperature is 86°F and minimum temperature is 83°F). The climate is burning around this city in this month. With 8.3in over 11 days, rain may occur for your vacations. But this is moderate and it will not be continuous.
With a correct climate, the month of september is okay (but not good time) for traveling there in Saint-Barthelemy.
| September | |||
| Average temperature | 85°F | ||
| Highest temperature | 86°F | ||
| Lowest temperature | 83°F | ||
| Sea temperature | 85°F | ||
| Rainfall | 8.3in | ||
| Number of days with rainfall | 11 day(s) (38%) | ||
| Humidity | 78% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 39% | ||
| Length of day | 12:13 | ||
| Our opinion at whereandwhen.net | tolerable |
All cities in Saint-Barthelemy in september
| Gustavia in september | tolerable weather |
| Grand Cul-de-Sac in september | tolerable weather |
| Colombier (Saint-Barth) in september | tolerable weather |
| Chevreau Island in september | tolerable weather |
| Fourchue Island in september | tolerable weather |
| Frégate Island in september | tolerable weather |
| Nikki Beach in september | tolerable weather |
Weather data for Saint-Barthelemy in september:
Weather data for Saint-Barthelemy in september is derived from an average of the weather forecast since 2009 in Saint-Barthelemy. There is a margin of error and these forecasts are to be considered as general information only. The weather in Saint-Barthelemy 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 Saint Barthelemy.