Fort-de-France Weather in September
September in Fort-de-France brings high temperatures, with highs of 30°C (86°F) and nights dropping to 26°C (79°F). Rainfall is on the higher side this month, averaging around 140 mm (5.5 in), so keep a rain jacket handy.
Rainfall in Fort-de-France in September
Historically, September sees about 27 days of rain, with a monthly average of 140 mm (5.5 in). Rain falls regularly this month and can be quite heavy when it does. Showers can be substantial, so waterproof gear is a good idea.
Temperature in Fort-de-France in September
September in Fort-de-France sees highs of 30°C (86°F) and lows of 26°C (79°F) overnight. Overall, the month follows a fairly predictable daily temperature pattern. Nights remain warm at around 26°C (79°F). For a more comfortable sleep, a cold shower before bed and a fan or air conditioning can make a big difference.
Sunshine in Fort-de-France in September
Enjoy a sunny month with about 219 hours of sunshine, the clear skies make Fort-de-France even more beautiful.
Wind Speed in Fort-de-France in September
September sees wind speeds averaging 4 m/s (8 knots). You'll experience variable conditions with moderate winds that create small waves on water and keep branches moving. Conditions range from light winds to moderate breezes throughout the month.
Average water temperature in September
The water reaches 29°C (84°F) this month. It's on the warm side, which suits people who prefer that, but don't expect a cooling dip if the air temperature is also high.If you prefer dry days with pleasant temperatures, September may not be the ideal month to visit Fort-de-France. Our weather planner can help you explore destinations with more pleasant weather conditions.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Martinique, check out our Fort-de-France's climate page.
Fort-de-France Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
30°C (86°F)
Water Temperature
29°C (84°F) *
Chance of Rain
91%
Precipitation
140 mm (5.5 in)
Rainy days
27 days
Humidity
85% *
Windspeed
4 m/s (8 knots) *
Sunshine
219 hours *
Percentage Sunshine
*
Daily Historical Temperatures
48-year average (1976-2025)
Based on our historical records, temperatures in Fort-de-France typically stay consistent throughout September, with daily highs averaging around 30°C (86°F). Nights are warm, with lows around 24°C (75°F).
Average temperatures in September
Historical weather for Fort-de-France in September
Browse day-by-day weather records for Fort-de-France spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Fort-de-France historical weather extremes in September
Based on 26 years of weather observations in Fort-de-France between 1999 and 2025, these are the recorded extremes.
- On September 12, 2023, temperatures climbed to 35°C (95°F), marking the warmest September day on record.
- The coldest September day was on September 18, 2008, with a maximum of 26°C (79°F).
- The lowest overnight temperature recorded in September was 21°C (70°F) (September 20, 2021).
Best Places in Martinique in September
Find out more about the weather in Martinique and which places have the best travel conditions in this month. See all of Martinique in September →
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What to Wear in Fort-de-France in September
Warm weather calls for comfortable, breathable clothing in September. Cotton t-shirts, shorts, light dresses, and sandals are perfect. You might still want a light layer for evenings or air-conditioned places (for example buses). High rain levels are expected, so pack waterproof gear and an umbrella or poncho. The water temperature sits at about 29°C (84°F), making it perfect for swimming and water activities. Don't forget to pack your favorite swimwear and perhaps some snorkel gear. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Fort-de-France in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Martinique, check out our Fort-de-France's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Fort-de-France climate overview or explore weather in Martinique.
