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Marigot Bay Weather in September
In Marigot Bay, September brings very high daytime temperatures around 31°C (88°F), with nights cooling to 26°C (79°F). Expect quite a bit of rainfall this month.
Rainfall in Marigot Bay in September
You can expect rain on roughly 24 days based on historical data, averaging 124 mm (4.9 in) 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 Marigot Bay in September
Daytime temperatures in Marigot Bay reach 31°C (88°F) in September, dropping to 26°C (79°F) at night. It's usually most comfortable outside during the morning and later in the day. Nights stay warm at around 26°C (79°F), so light bedding and good ventilation are worth thinking about.
Sunshine in Marigot Bay in September
The days are predominantly sunny, with an estimated total of around 238 hours of sunshine. These sun-filled days are perfect for playing sports, visiting parks, or going for a bike ride.September in Marigot Bay has its charm. However, if you're seeking pleasant, dry and sunny weather, our weather planner can help you explore other destinations in the world.
Marigot Bay Temperature in September
Min Temperature
26°C (79°F)
Max Temperature
31°C (88°F)
Chance of Rain
80%
Precipitation
124 mm (4.9 in)
Rainy days
24 days
Humidity
81% *
Sunshine
238 hours *
Percentage Sunshine
*
* Data from: Saint Lucia, Saint Lucia (9 KM, 5 Miles).
Marigot Bay Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Marigot Bay - and find the best time to visit.
Daily Historical Temperatures
49-year average (1976-2025)
Based on our historical records, temperatures in Marigot Bay typically stay consistent throughout September, with daily highs averaging around 31°C (88°F). Nights are warm, with lows around 25°C (77°F).
Average temperatures in September
Historical weather records for Marigot Bay in September
Browse day-by-day weather records for Marigot Bay spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Marigot Bay historical weather extremes in September
Based on weather observations in Marigot Bay between 1990 and 2026, these are the recorded extremes during September.
- The hottest September day on record in Marigot Bay reached 34°C (93°F) (September 3, 2003).
- On September 18, 2008, Marigot Bay saw its coldest September day with temperatures maxing out at 27°C (81°F).
- The lowest overnight temperature recorded in September was 21°C (70°F) (September 29, 1994).
Best Places in Saint Lucia in September
Find out more about the weather in Saint Lucia and which places have the best travel conditions in this month. See all of Saint Lucia in September →
perfect weather
pleasant
tolerable
unpleasant
poor
Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).
What to Wear in Marigot Bay 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. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.
What To Do in Marigot Bay in September
We rated the following activities from 1 (least suitable) to 10 (best) to do.
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Swimming9/10 -
Cycling7/10 -
Walking7/10 -
Camping7/10 -
Outdoor sports7/10
Marigot Bay 3-Day Forecast
More climate data for Marigot Bay
Temperature Rainfall Sunshine Humidity
See the full Marigot Bay climate overview or explore weather in Saint Lucia.
Popular in September
Where to go in September - average daytime high across popular destinations.
Marigot Bay
31°C (88°F) Castries31°C (88°F) Laborie30°C (86°F) Rodney Bay Village31°C (88°F) Cap Estate30°C (86°F) Soufrière31°C (88°F) Gros Islet31°C (88°F) Vieux Fort30°C (86°F) Bucket list
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