Fort-de-France Bay
Martinique
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Fort-de-France Bay, Martinique

Shallow clear waters, rocks, and palm trees on Fort-de-France Bay in Martinique, with cloudy skies and a far view of a mountain
Shallow clear waters, rocks, and palm trees on Fort-de-France Bay in Martinique, with cloudy skies and a far view of a mountain
The first month of the autumn, September, is still a hot month in Fort-de-France Bay, Martinique, with temperature in the range of an average low of 24°C (75.2°F) and an average high of 30.3°C (86.5°F).

Temperature

With an average high-temperature of 30.3°C (86.5°F) and an average low-temperature of 24°C (75.2°F), September is the warmest month.

Rainfall

In Fort-de-France Bay, during September, the rain falls for 17.9 days and regularly aggregates up to 234.5mm (9.2") of precipitation. In Fort-de-France Bay, during the entire year, the rain falls for 198.2 days and collects up to 2020.5mm (79.5") of precipitation.

Sea temperature

Months with the warmest seawater in Fort-de-France Bay, Martinique, are September and October, with an average sea temperature of 29°C (84.2°F).
Note: 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.

Daylight

In September, the average length of the day in Fort-de-France Bay is 12.2h.

Sunshine

The average sunshine in Fort-de-France Bay, Martinique, is 6.9h.

UV index

Months with the highest UV index are March through September, with an average maximum UV index of 12. A UV Index reading of 11, and higher, represents an extreme health hazard from unsafe exposure to the UV radiation for the ordinary person.
Note: 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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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. Beware! The reflection of water and sand dramatically increases exposure to the UV rays.

What is the warmest month in Fort-de-France Bay?

With an average high-temperature of 30.3°C (86.5°F) and an average low-temperature of 24°C (75.2°F), September is the warmest month in Fort-de-France Bay, Martinique.

What is the temperature in September in Fort-de-France Bay?

The average high-temperature, in September, in Fort-de-France Bay, is 30.3°C (86.5°F), while the average low-temperature is 24°C (75.2°F).

How many days does it rain in September in Fort-de-France Bay?

In September, the rain falls for 17.9 days. Throughout September, 234.5mm (9.2") of precipitation is accumulated.

When is the sea warmest in Fort-de-France Bay?

September and October, with an average sea temperature of 29°C (84.2°F), are months with the warmest seawater in Fort-de-France Bay, Martinique.

How warm is the water in September in Fort-de-France Bay?

In Fort-de-France Bay, Martinique, in September, the average water temperature is 29°C (84.2°F). For any water activity, surface water temperatures between 25°C (77°F) and 29°C (84.2°F) are considered as excellent and extremely pleasant for lengthened periods.

What is the average length of the day in September in Fort-de-France Bay?

The average length of the day in September in Fort-de-France Bay is 12.2h.

How long on average sun shines in September in Fort-de-France Bay?

In Fort-de-France Bay, Martinique, the average sunshine in September is 6.9h.

What is the month with the highest UV index in Fort-de-France Bay?

March through September, with an average maximum UV index of 12, are months with the highest UV index.

How high is the UV index in September in Fort-de-France Bay?

The average daily maximum UV index in September in Fort-de-France Bay is 12. A UV Index reading of 11, and higher, represents an ultimate hazard to health from the exposure to the Sun's UV rays.
Average temperature in September - Fort-de-France Bay, Martinique
  • Average high temperature in September: 30.3°C

The warmest month (with the highest average high temperature) is September (30.3°C).
The month with the lowest average high temperature is January (27.5°C).

  • Average low temperature in September: 24°C

Months with the highest average low temperature are June, August and September (24°C).
The coldest month (with the lowest average low temperature) is February (21.7°C).

Average rainfall in September - Fort-de-France Bay, Martinique
  • Average rainfall in September: 234.5mm

The wettest month (with the highest rainfall) is October (265.9mm).
The driest month (with the lowest rainfall) is March (74.3mm).

Average rainfall days in September - Fort-de-France Bay, Martinique
  • Average rainfall days in September: 17.9 days

The month with the highest number of rainy days is July (20 days).
The month with the lowest number of rainy days is April (11.5 days).

Average sea temperature in September - Fort-de-France Bay, Martinique
  • 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 February and March (26°C).

Average daylight in September / Average sunshine in September - Fort-de-France Bay, Martinique
  • Average daylight in September: 12.2h

The month with the longest days is June (Average daylight: 13h).
The month with shortest days is December (Average daylight: 11.3h).

  • Average sunshine in September: 6.9h

Months with most sunshine are March and August (Average sunshine: 7.2h).
The month with least sunshine is October (Average sunshine: 5.9h).

Average UV index in September - Fort-de-France Bay, Martinique
  • Average UV index in September: 12

Months with the highest UV index are March, April, May, June, July, August and September (UV index 12).
The month with the lowest UV index is December (UV index 8).