Temperatures in September
It's hot in September in Saint Barthélemy with an average temperature of 32°C. Temperatures this month range from a low of 31°C to a high of 32°C. At night, you can expect temperatures between 27°C and 28°C.
Max and Min Temperatures per Day
This chart shows the daily maximum and minimum temperatures in degrees Celsius for Saint Barthélemy in September. The red line indicates the max temperatures, and the blue line shows the minimums.
Start of September
The month of September starts in Saint Barthélemy with hot temperatures, averaging around 32°C during the day and nights close to 28°C. You can expect regular precipitation, but there’s also a chance for some sunny days in the first days of the month. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
Mid-September
By mid-September, the average daytime temperature stays the same at 32°C, with nights close to 28°C. During this part of the month, you can expect regular precipitation, but there’ll also be some sunny days. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
End of September
By the end of September, the average daytime temperature in Saint Barthélemy will be around 32°C, with nights close to 28°C. A shower might show up, but overall the weather will be dry and sunny. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal.
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Precipitation in September
In September, there is an average of 125 mm of precipitation, spread over 14 days. The wind speed is around 4 Bft, mostly coming from the East.
The average precipitation chance is 45% per day this month.
Precipitation Chance
This chart shows the daily precipitation chance (in percentages) in September for Saint Barthélemy. 0% means it never rained on that day in the past 10 years, and 100% means it rained every day. All values in between represent the average chance of precipitation on that day.
Saint Barthélemy in September |
UK | ||
|---|---|---|---|
 Average Temperature |
32°C | 20°C | |
 High Temp |
32°C | 22°C | |
| Low Temp |
31°C | 17°C | |
 Total Precipitation |
125 mm | 44 mm | |
| Rainy Days |
14 days | 8 days | |
August
UV index
The UV index is a maximum of 9 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.
Is September a good time to visit Saint Barthélemy?
After some sun? Then September isn’t the best time to be in Saint Barthélemy. The temperature is pleasant, but there’s too much chance of rain this month.
Temperature records for Saint Barthélemy in September
With 34°C, Saint Barthélemy hit the highest temperature in the last 10 years in September 2023. The lowest daytime temperature in this month was 27°C in 2022. The extreme night temperatures ranged from a low of 22°C to a high of 29°C.
Check out the climate of Saint Barthélemy for all months and discover the best travel time
The climate of Saint Barthélemy is based on weather data from Gustavia. Other locations might have different weather. You can check out all destinations in Saint Barthélemy for a full picture of the climate.
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Daily Temperature in September in Saint Barthélemy
This chart shows the average daily temperatures, both day and night, for each day in September in Saint Barthélemy, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.
Daily Precipitation in September in Saint Barthélemy
The chart below shows the average daily precipitation in September for Saint Barthélemy, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.
A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for September, you can expect around 14 days of rain in Saint Barthélemy.
Daily UV Index in September in Saint Barthélemy
This chart shows the average daily UV index in September in Saint Barthélemy, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.
Temperature in September in Saint Barthélemy Over the Years
This chart shows the average temperature in September in Saint Barthélemy, measured in degrees Celsius, over the past years.
Total Precipitation in September in Saint Barthélemy Over the Years
This chart shows the average precipitation in September in Saint Barthélemy, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.
Daily climate in September for Saint Barthélemy
Click on a specific day in September for detailed info on the typical weather on that day in Saint Barthélemy. Check out the historical temperatures and precipitation over the past 10 years on this day.
Weather experiences in September in Saint Barthélemy
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Average Weather in Saint Barthélemy by Month
Click on a month below to see detailed weather info for Saint Barthélemy. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.
Or check out the climate of Saint Barthélemy for all months at once
