Les Trois-Îlets Weather in September

September in Les Trois-Îlets brings high temperatures, with highs of 29°C (84°F) and nights dropping to 26°C (79°F). Rainfall is on the higher side this month, averaging around 148 mm (5.8 in), so keep a rain jacket handy.

Rainfall in Les Trois-Îlets in September

You can expect rain on around 27 days based on historical patterns, with 148 mm (5.8 in) average for the month. This month brings frequent, heavy showers. Both the number of wet days and the rainfall totals are on the high side.

Temperature in Les Trois-Îlets in September

In September, Les Trois-Îlets gets high temperatures, with highs of 29°C (84°F). Nights cool to around 26°C (79°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. Nights are warm at 26°C (79°F), which can make sleeping uncomfortable. Keeping windows open or using a fan can help. A cold shower before bed is also a good way to cool down.

Sunshine in Les Trois-Îlets in September

With approximately 219 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.

Wind Speed in Les Trois-Îlets in September

In September, average wind speeds reach 4 m/s (8 knots), leading to light to moderate breezes. Conditions vary from day to day, with both calm and windier periods.

Average water temperature in September

At 29°C (84°F), the water feels bath-warm. Fine for swimming, but those looking for a cooling swim may be a bit disappointed.

If you're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Les Trois-Îlets. Our weather planner can help you explore destinations with more pleasant weather conditions.

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For a detailed overview over the year and the best time to visit Martinique, check out our Les Trois-Îlets's climate page.

Les Trois-Îlets Temperature in September

Min Temperature 26°C (79°F)  

Max Temperature 29°C (84°F)  

Water Temperature 29°C (84°F) *  

Chance of Rain 91%  

Precipitation 148 mm (5.8 in)  

Rainy days 27 days  

Humidity 85% *  

Windspeed 4 m/s (8 knots) *  

Sunshine 219 hours *  

Percentage Sunshine *  

* Data from: Martinique, Martinique (8 KM, 5 Miles).

Daily Historical Temperatures

48-year average (1976-2025)

Based on our historical records, temperatures in Les Trois-Îlets typically stay consistent throughout September, with daily highs averaging around 29°C (84°F). Nights are warm, with lows around 24°C (75°F).

Average temperatures in September

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Historical weather for Les Trois-Îlets in September

Browse day-by-day weather records for Les Trois-Îlets spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Historical weather Temperatures Precipitation

‹ 2026 2025 2024 2023 2022 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 1988 1987 1986 1985 1984 1983 1982 1981 1980 1979 1978 1977 ›

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Les Trois-Îlets historical weather extremes in September

The extremes listed below come from historical weather data collected in Les Trois-Îlets from 1999 through 2025.

• On September 12, 2023, temperatures climbed to 35°C (95°F), marking the warmest September day on record.
• On September 18, 2008, Les Trois-Îlets saw its coldest September day with temperatures maxing out at 26°C (79°F).
• Les Trois-Îlets registered its coldest September night on September 20, 2021, with temperatures dropping to 21°C (70°F).

What to Wear in Les Trois-Îlets in September

Warm temperatures in September make for comfortable sightseeing weather. Pack breathable fabrics like cotton shirts, knee-length shorts or skirts, and comfortable walking shoes. A thin long sleeve for indoor spaces is handy. Prepare for significant rainfall with proper waterproof clothing and shoes. Expect water temperatures of around 29°C (84°F), which is ideal for taking a refreshing dip. Bring swimwear and consider packing a towel for drying off. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.

What To Do in Les Trois-Îlets in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

Swimming

9/10

Cycling

7/10

Walking

7/10

Camping

7/10

Outdoor sports

7/10

Select a Month

Check the conditions for any month of the year.

• January
• February
• March
• April

• May
• June
• July
• August

• September
• October
• November
• December

For a detailed overview over the year and the best time to visit Martinique, check out our Les Trois-Îlets's climate page.

More climate data for Les Trois-Îlets

Temperature Rainfall Sunshine Humidity Wind Speed Water Temp

See the full Les Trois-Îlets climate overview or explore weather in Martinique.