Average weather for Saint Barthélemy 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.
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. You can expect regular precipitation, but there will also be some sunny days in the early part of the month. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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. Light clothing like shorts or a dress, and a hat and sunglasses are perfect.
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.
Saint Barthélemy in September |
New York | ||
|---|---|---|---|
 Average temperature |
32°C | 27°C | |
 Max. temperature |
32°C | 31°C | |
| Min. temperature |
31°C | -5°C | |
 Total precipitation |
125 mm | 57 mm | |
| Rainy days |
14 days | 9 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?
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.
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.
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.
Daily Temperature in September in Saint Barthélemy
This chart shows the average daily high and low temperatures in September for Saint Barthélemy, in degrees Celsius. The red line represents the highs, and the blue line shows the lows. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, provide the average temperatures for this month.
Daily Precipitation in September in Saint Barthélemy
The chart below shows the average daily precipitation in September for Saint Barthélemy, measured in millimeters over the past few years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are listed 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 it rained more often. But remember, it’s just an average, and every day can be different. Based on historical weather data for September, you can expect about 14 days of precipitation 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 few years.
Total precipitation in September in Saint Barthélemy over the years
This chart shows the average precipitation in September in Saint Barthélemy, measured in millimeters over the past years. Precipitation is always measured as water, whether it’s snow or hail.
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.
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
