The weather in September in Saint Barthélemy
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.
Looking for sun? September isn’t a good month to be in Saint Barthélemy. The temperature is nice, but there’s too much chance of rain.
Average temperatures and precipitation
This chart shows the average daily maximum and minimum temperatures (in degrees Celsius) and precipitation (in millimeters) in September for Saint Barthélemy. A low precipitation value usually indicates little to no rainfall on that day in recent years, while a higher value suggests more frequent rainfall.
Temperature records
With 34°C in 2023, Saint Barthélemy reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 27°C in 2022. The extreme nighttime temperatures ranged from a lowest recorded value of 22°C to a highest value of 29°C.
Rainfall amount
In September, there is an average of 125 mm of precipitation, spread over 13 days. The wind speed is around 4 Bft, mostly coming from the East.
Daily weather in September for Saint Barthélemy
Click on any day in September to get detailed info about the usual weather on that day in Saint Barthélemy. Check out the historical temperatures and precipitation over the past 10 years on this day.
September weather comparison
| Saint Barthélemy | New York | |
|---|---|---|
| Average temperature | 32°C | 27°C |
| Max. temperature | 32°C | 31°C |
| Min. temperature | 27°C | -5°C |
| Total precipitation | 125 mm | 57 mm |
| Rainy days | 13 days | 9 days |
Start of September
The month of September starts in Saint Barthélemy with hot temps, averaging around 32°C during the day and nights around 28°C.
Mid September
By mid-September, daytime temps stay steady at around 32°C, with nights around 28°C. During this part of the month, you might see regular precipitation, but there will also be some sunny days.
End of September
By the end of September, the average daytime temperature in Saint Barthélemy is around 32°C, while nighttime temps are about 28°C. A shower might pop up, but overall, the weather will be dry and sunny.
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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.
Check out the climate of Saint Barthélemy for all months and discover the best travel time
The climate in Saint Barthélemy is based on weather data from Gustavia. Other spots might have different weather. You can check out all destinations in Saint Barthélemy to get the full picture of the climate.
Temperature charts
These charts show the average temperatures in September in Saint Barthélemy. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.
Daily Temperature in September in Saint Barthélemy
Temperature in September in Saint Barthélemy over the years
Precipitation charts
These charts show the average amount of precipitation in September in Saint Barthélemy. 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.
Daily Precipitation in September in Saint Barthélemy
Total precipitation in September in Saint Barthélemy over the years
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.
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.