Sint Maarten weather in September 2025

Expect 31°C daytime maximum temperatures in the shade with on average 8 hours of sunshine per day in Sint Maarten in September. Check more long-term weather averages for Sint Maarten in September before you book your next holiday to Sint Maarten in 2025/2026.

  • 31°C maximum daytime temperature in September in Sint Maarten31
    31°C max day temperature
  • 8 hours of sunshine per day
  • 19 days with some rainfall in September in Sint Maarten19
    19 days with some rainfall
  • 25°C minimum night-time temperature in September in Sint Maarten25
    25°C min night temperature
  • 12 hours of daylight per day in September in Sint Maarten12
    12 hours of daylight per day
  • Very high heat & humidity in September in Sint MaartenVH
    Very High heat & humidity
  • 129 mm monthly rainfall in September in Sint Maarten129
    129 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Sint Maarten11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Sint Maarten29
    29°C sea temperature

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The September weather guide for Sint Maarten 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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How hot is it in Sint Maarten in September?

Daytime temperatures usually reach 31°C in Sint Maarten in September with very high heat and humidity, falling to 25°C at night.

How sunny is it in Sint Maarten in September?

There are normally 8 hours of bright sunshine each day in Sint Maarten in September - that's 63% of daylight hours.

How warm is the sea around Sint Maarten in September?

The average sea temperature around Sint Maarten in September is 29°C.

Does it rain in Sint Maarten in September?

There are usually 19 days with some rain in Sint Maarten in September and the average monthly rainfall is 129mm.

What is the chance of a hurricane in Sint Maarten in September?

On average 1.2 days in September in Sint Maarten are likely to be affected by the passage of one or more tropical storms.

Sint Maarten September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:58 18:26
Monday, 15th September 2025 06:00 18:14
Tuesday, 30th September 2025 06:02 18:01

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