Saint-Joseph Weather in September
With daytime temperatures of 30°C (86°F) and nighttime lows of 26°C (79°F), September in Saint-Joseph brings high temperatures during the day. Do keep in mind that quite a bit of rainfall is typical. Around 145 mm (5.7 in) falls on average.
Rainfall in Saint-Joseph in September
Historically, September sees about 27 days of rain, with a monthly average of 145 mm (5.7 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 Saint-Joseph in September
In September, Saint-Joseph gets high temperatures, with highs of 30°C (86°F). Nights cool to around 26°C (79°F). Conditions stay fairly consistent through the month, making it easier to plan what to wear. With lows around 26°C (79°F), the nights are warm enough that a sheet is usually all you need for bedding.
Sunshine in Saint-Joseph 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 Saint-Joseph in September
Wind speeds average 4 m/s (8 knots) during September. At this speed, expect moderate winds that can raise dust and move small branches. Since this is an average, some days have gentle light winds while others experience stronger breezes that are quite noticeable.
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're looking for dry conditions and comfortable temperatures, September may not be the ideal month to visit Saint-Joseph. 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 Saint-Joseph's climate page.
Saint-Joseph 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
145 mm (5.7 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 Saint-Joseph 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 Saint-Joseph in September
Browse day-by-day weather records for Saint-Joseph spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Saint-Joseph historical weather extremes in September
Based on weather observations in Saint-Joseph between 1999 and 2025, these are the recorded extremes during September.
- On September 12, 2023, temperatures climbed to 35°C (95°F), marking the warmest September day on record.
- On September 18, 2008, Saint-Joseph saw its coldest September day with temperatures maxing out at 26°C (79°F).
- Saint-Joseph registered its coldest September night on September 20, 2021, with temperatures dropping to 21°C (70°F).
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 Saint-Joseph 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. With water temperatures around 29°C (84°F), swimming conditions are excellent. Pack your swimsuit, goggles, and maybe some water shoes. You'll definitely want to pack sunglasses and sunscreen. There will be plenty of bright sunshine this month.What To Do in Saint-Joseph 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 Saint-Joseph's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full Saint-Joseph climate overview or explore weather in Martinique.
