The weather in September in Gustavia

It's hot in September in Gustavia 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 Gustavia. 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 Gustavia, 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, Gustavia 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 Gustavia

Click on any day in September to get detailed info about the usual weather on that day in Gustavia. Check out the historical temperatures and precipitation over the past 10 years on this day.

1

32° / 28°

2

32° / 28°

3

32° / 28°

4

32° / 28°

5

32° / 28°

6

32° / 28°

7

32° / 28°

8

32° / 28°

9

32° / 28°

10

32° / 28°

11

31° / 28°

12

32° / 28°

13

32° / 28°

14

32° / 28°

15

32° / 27°

16

32° / 28°

17

32° / 27°

18

31° / 27°

19

31° / 27°

20

32° / 27°

21

32° / 28°

22

32° / 28°

23

32° / 28°

24

32° / 27°

25

31° / 27°

26

32° / 28°

27

32° / 27°

28

32° / 27°

29

32° / 27°

30

32° / 27°

Start of September

The month of September starts in Gustavia 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 Gustavia 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 Gustavia for all months and discover the best travel time

Temperature charts

These charts show the average temperatures in September in Gustavia, 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 Gustavia

Temperature in September in Gustavia over the years

Precipitation charts

These charts show the average amount of precipitation in September in Gustavia, 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 Gustavia

Total precipitation in September in Gustavia over the years

Daily UV index in September in Gustavia

This chart shows the average daily UV index in September in Gustavia, 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.

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Average weather in Gustavia by month

Click on a month below to see detailed weather info for Gustavia. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.