The weather in September in Castries

It's hot in September in Castries 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 25°C and 27°C.

Looking for sun? September isn’t a good month to be in Castries. 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 Castries, Saint Lucia. 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, Castries reached the highest temperature in September over the past 10 years. The lowest daytime temperature in this month was 27°C in 2014. The extreme nighttime temperatures ranged from a lowest recorded value of 22°C to a highest value of 28°C.

Rainfall amount

In September, there is an average of 230 mm of precipitation, spread over 22 days. The wind speed is around 4 Bft, mostly coming from the East.

Daily weather in September for Castries

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

1

32° / 26°

2

32° / 26°

3

32° / 26°

4

32° / 27°

5

32° / 26°

6

32° / 26°

7

32° / 26°

8

32° / 26°

9

32° / 26°

10

32° / 26°

11

32° / 26°

12

32° / 26°

13

32° / 26°

14

32° / 26°

15

32° / 27°

16

32° / 26°

17

32° / 26°

18

32° / 26°

19

31° / 25°

20

32° / 25°

21

32° / 25°

22

32° / 26°

23

32° / 26°

24

32° / 26°

25

32° / 26°

26

32° / 26°

27

31° / 25°

28

32° / 25°

29

32° / 25°

30

32° / 26°

Start of September

The month of September starts in Castries with hot temps, averaging around 32°C during the day and nights around 27°C.

Mid September

By mid-September, daytime temps stay steady at around 32°C, with nights around 26°C. There’s a high chance of precipitation during this time.

End of September

By the end of September, the average daytime temperature in Castries is around 32°C, while nighttime temps are about 26°C. There’s a significant chance of many days with precipitation.

Find affordable trips to Castries

UV index

The UV index is a maximum of 10 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.

The hurricane season in Castries runs from June to November.

Check out the climate of Castries for all months and discover the best travel time

Temperature charts

These charts show the average temperatures in September in Castries, Saint Lucia. The temperatures are shown in degrees Celsius and are calculated based on data from the past 10 years.

Daily Temperature in September in Castries

Temperature in September in Castries over the years

Precipitation charts

These charts show the average amount of precipitation in September in Castries, Saint Lucia. 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 Castries

Total precipitation in September in Castries over the years

Daily UV index in September in Castries

This chart shows the average daily UV index in September in Castries, 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 Castries by month

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