Marigot Bay
Saint Lucia
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Marigot Bay, Saint Lucia

The first month of the autumn, September, is still a hot month in Marigot Bay, Saint Lucia, with temperature in the range of an average low of 24°C (75.2°F) and an average high of 30°C (86°F).

Temperature

May through October, with an average high-temperature of 30°C (86°F), are the warmest months.

Rainfall

In Marigot Bay, Saint Lucia, during September, the rain falls for 24 days and regularly aggregates up to 259mm (10.2") of precipitation. In Marigot Bay, during the entire year, the rain falls for 208 days and collects up to 2377mm (93.6") of precipitation.

Sea temperature

September and October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater. For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

Daylight

In Marigot Bay, the average length of the day is 12.2h.

Sunshine

Months with the most sunshine are January through September, November and December, with an average of 8h of sunshine.

UV index

Months with the highest UV index in Marigot Bay are March through September, with an average maximum UV index of 12. A UV Index estimate of 11, and higher, represents an extreme threat to health from the exposure to the Sun's UV radiation for average individuals.
In September, the average maximum UV index of 12 translate into the following recommendations:
Take all required precautions, as unprotected skin and eyes can burn in minutes. Seek shade and minimize exposure to direct Sun in a period between 10 a.m. and 4 p.m. when UV radiation is most intense; keep in mind that shade structures like parasols or canopies do not provide perfect sun protection. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Even on cloudy days, a sunscreen with a minimum 30 sun protection factor should be generously applied and frequently re-applied, including after every swim or outdoor exercise. Caution! The reflection of sand and water significantly increases the intensity of the Sun's UV radiation.

What are the warmest months in Marigot Bay?

Warmest months are May through October, with an average high-temperature of 30°C (86°F).

What is the temperature in September in Marigot Bay?

The average high-temperature, in September, in Marigot Bay, is 30°C (86°F), while the average low-temperature is 24°C (75.2°F).

How many days does it rain in September in Marigot Bay?

In Marigot Bay, Saint Lucia, in September, it is raining for 24 days, with typically 259mm (10.2") of accumulated precipitation.

When is the sea warmest in Marigot Bay?

September and October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Marigot Bay, Saint Lucia. For swimming, diving, and other water activities, temperatures between 25°C (77°F) and 29°C (84.2°F) are perceived as very enjoyable and pleasurable for prolonged periods without feeling uncomfortable.

What is the sea water temperature in September in Marigot Bay?

In Marigot Bay, in September, the average water temperature is 29°C (84.2°F). Water temperature between 25°C (77°F) and 29°C (84.2°F) is regarded as very warm and enjoyable by all. With these temperatures, water activities are pleasurable, without feeling uncomfortable for prolonged periods.

How many hours of daylight does Marigot Bay have in September?

In September, the average length of the day in Marigot Bay, Saint Lucia, is 12.2h.

What is the month with the most sunshine in Marigot Bay?

Months with the most sunshine are January through September, November and December, with an average of 8h of sunshine.

How many hours of sunshine does Marigot Bay have in September?

In September, the average sunshine in Marigot Bay, Saint Lucia, is 8h.

What is the month with the highest UV index in Marigot Bay?

March through September, with an average maximum UV index of 12, are months with the highest UV index in Marigot Bay, Saint Lucia.

What is the UV index reading in September in Marigot Bay?

In Marigot Bay, the average daily maximum UV index in September is 12. A UV Index estimate of 11, and higher, represents an extreme health vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Marigot Bay, Saint Lucia
  • Average high temperature in September: 30°C

Warmest months (with the highest average high temperature) are May, June, July, August, September and October (30°C).
Months with the lowest average high temperature are January, February, March and December (28°C).

  • Average low temperature in September: 24°C

Months with the highest average low temperature are May, June, July, August and September (24°C).
Coldest months (with the lowest average low temperature) are January, February, March and December (22°C).

Average rainfall in September - Marigot Bay, Saint Lucia
  • Average rainfall in September: 259mm

The wettest month (with the highest rainfall) is October (303mm).
The driest month (with the lowest rainfall) is March (99mm).

Average rainfall days in September - Marigot Bay, Saint Lucia
  • Average rainfall days in September: 24 days

The month with the highest number of rainy days is September (24 days).
The month with the lowest number of rainy days is April (11 days).

Average sea temperature in September - Marigot Bay, Saint Lucia
  • Average sea temperature in September: 29°C

Best months for swimming (with the highest average sea temperature) are September and October (29°C).
Coldest months (with the lowest average sea temperature) are January, February, March and April (27°C).

Average daylight in September / Average sunshine in September - Marigot Bay, Saint Lucia
  • Average daylight in September: 12.2h

Months with the longest days are June and July (Average daylight: 12.9h).
The month with shortest days is December (Average daylight: 11.3h).

  • Average sunshine in September: 8h

Months with most sunshine are January, February, March, April, May, June, July, August, September, November and December (Average sunshine: 8h).
The month with least sunshine is October (Average sunshine: 7h).

Average UV index in September - Marigot Bay, Saint Lucia
  • Average UV index in September: 12

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
Months with the lowest UV index are January, November and December (UV index 9).