Marigot Bay weather in September 2025

Expect 30°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Marigot Bay in September. Check more long-term weather averages for Marigot Bay in September before you book your next holiday to St Lucia in 2025/2026.

  • 30°C maximum daytime temperature in September in Marigot Bay30
    30°C max day temperature
  • 8 hours of sunshine per day
  • 24 days with some rainfall in September in Marigot Bay24
    24 days with some rainfall
  • 24°C minimum night-time temperature in September in Marigot Bay24
    24°C min night temperature
  • 12 hours of daylight per day in September in Marigot Bay12
    12 hours of daylight per day
  • High heat & humidity in September in Marigot BayH
    High heat & humidity
  • 259 mm monthly rainfall in September in Marigot Bay259
    259 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Marigot Bay11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Marigot Bay29
    29°C sea temperature

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The September weather guide for St Lucia (Marigot Bay) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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More about St Lucia

How hot is it in Marigot Bay in September?

Daytime temperatures usually reach 30°C in Marigot Bay in September with high heat and humidity, falling to 24°C at night.

How sunny is it in Marigot Bay in September?

There are normally 8 hours of bright sunshine each day in Marigot Bay in September - that's 62% of daylight hours.

How warm is the sea around Marigot Bay in September?

The average sea temperature around Marigot Bay in September is 29°C.

Does it rain in Marigot Bay in September?

There are usually 24 days with some rain in Marigot Bay in September and the average monthly rainfall is 259mm.

What is the chance of a hurricane in Marigot Bay in September?

On average 1.1 days in September in Marigot Bay are likely to be affected by the passage of one or more tropical storms.

Marigot Bay September sunrise & sunset times

Browse the sunrise and sunset times for Marigot Bay in September 2025. Select a month to view Marigot Bay sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:52 18:15
Monday, 15th September 2025 05:53 18:05
Tuesday, 30th September 2025 05:54 17:54

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