Weather in St Lucia in September

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Visiting St Lucia in September

The weather in September is slightly warmer than the previous month. September has average maximum temperatures of 31°C (88°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.2 hours of sunshine per day. It is a good time for sunbathing in St Lucia.

September has total rainfall of 26.1cm (10.3inches) making it quite rainy but mostly with moderate tropical showers. There are only 15 days with some rainfall so you can still enjoy the beach on the many clear days.

Sea temperatures are a very warm 29°C (84°F). September is an excellent month for swimming in St Lucia with very comfortable temperatures for bathing all day. The sea temperature in September is slightly warmer than the previous month.

Consider visiting St Lucia in the months of January, February, March, April, for the best beach weather. Also consider one of our other suggestions for September.

Can you sunbathe in St Lucia in September?

Yes, September is a good time for sunbathing in St Lucia.

September has average maximum temperatures of 31°C (88°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.2 hours of sunshine per day. September has total rainfall of 26.1cm (10.3inches) making it quite rainy but mostly with moderate tropical showers. There are only 15 days with some rainfall so you can still enjoy the beach on the many clear days.

More about September temperature and sunshine.

Can you swim in St Lucia in September?

Yes, September is an excellent month for swimming in St Lucia with very warm sea temperatures 29°C (84°F).

More about September sea temperatures.

Is September a good time to holiday in St Lucia?

Yes, September is a good time for a holiday in St Lucia.

September has average maximum temperatures of 31°C (88°F) which is very hot and perfect for sunbathing on clear days. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.2 hours of sunshine per day. September has total rainfall of 26.1cm (10.3inches) making it quite rainy but mostly with moderate tropical showers. There are only 15 days with some rainfall so you can still enjoy the beach on the many clear days. It is a good time for sunbathing in St Lucia. Sea temperatures are a very warm 29°C (84°F). September is an excellent month for swimming in St Lucia with very comfortable temperatures for bathing all day.

More about the September temperatures and sunshine.

Is St Lucia warm in September?

Yes, St Lucia is very hot and perfect for sunbathing on clear days in September.

The average maximum temperature in St Lucia in September is 31°C (88°F). The average maximum temperature is 31°C (87°) in the previous month and 31°C (87°F) in the next month.

The average temperature in St Lucia in September is 28°C (83°F). The average temperature is 28°C (83°F) in the previous month and 28°C (83°F) in the next month.

More info about the September temperatures and sunshine.

How sunny is St Lucia in September?

The average day light hours per day in St Lucia in September are 12.2. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.2 hours of sunshine per day.

More about September sunshine.

Temperature in St Lucia in September

The weather in September is slightly warmer than the previous month. The average maximum temperature in St Lucia in September is 31°C (88°F). The average maximum temperature is 31°C (87°F) in the previous month and 31°C (87°F) in the next month.

The average temperature in St Lucia in September is 28°C (83°F). The average temperature is 28°C (83°F) in the previous month and 28°C (83°F) in the next month.

The average minimum temperature in St Lucia in September is 26°C (79°F). The minimum temperature is 26°C (79°F) in the previous month and 26°C (78°F) in the next month.

Sunshine in St Lucia in September

The days in September are marginally shorter than the previous month and days continue to get marginally shorter into October. During September the average day light hours are 12.2 per day in St Lucia. The sunshine percentage is 59% making it quite sunny but with occasional periods of cloudy and overcast skies. There are 7.2 hours of sunshine per day.

The ultraviolet index in St Lucia in September is typically 13.1 during September. An ultraviolet index reading above 11 indicates an extreme risk of harm from unprotected sun exposure. Unprotected skin risks burning in less than 10 minutes. Take all precautions because unprotected skin and eyes can burn in minutes. Tanning will be safest before 10am and after 4pm but only with a good application of sun screen. For those with sensitive skin stay in the shade and wear protective clothing, a wide-brimmed hat, and UV-blocking sunglasses. Generously apply broad spectrum SPF 30+ sunscreen every 2 hours, even on cloudy days. Watch out for relections from water that may increase ultraviolet exposure.

Sea Temperature in St Lucia in September

The average sea water temperature in St Lucia in September is 28.7°C (83.7°F) which is very warm and ideal for relaxing and swimming for the whole day. The sea temperature in September is slightly warmer than the previous month.

Rainfall in St Lucia in September

September weather is marginally wetter than the previous month and rainfall continues to rise slightly into October. September has fewer days of rain than the previous month. The average total rainfall in St Lucia in September is 26.1cm (10.3inches) and on average there are 15 rainy days in September making it a pretty wet time to visit the beach.

Humidity in St Lucia in September

The maximum dew point (an indicator of humidity) in St Lucia in September is 25°C (78°F) which is very uncomfortable and fairly oppressive unless you are on a beach. At night you would most likely require airconditioning. The dew point is 25°C (78°F) in the previous month and 25°C (25°F) in the next month.

The average maximum relative humidity in St Lucia in September is typically 90.2%. The maximum relative humidity is 90% in the previous month and 90.5% in the next month.

The average relative humidity in St Lucia in September is typically 77.3%. The average relative humidity is 78.2% in the previous month and 78% in the next month.

Wind Speed in St Lucia in September

The average maximum wind speed in St Lucia in September is typically 25KM/H (16MPH). The average maximum wind speed is 29KM/H (18MPH) in the previous month and 27KM/H (17MPH) in the next month.

The average wind speed in St Lucia in September is typically 14KM/H (9MPH). The average wind speed is 18KM/H (11MPH) in the previous month and 16KM/H (10MPH) in the next month.

The average wind direction in St Lucia in September is from the East.

Monthly Averages

Suggested Beaches in September

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Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.

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Need Inspiration?

Beaches recommended for you today, this weekend, in the next 2 weeks or in any month of the year.