Mustique weather in September 2025

Expect 29°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Mustique in September. Check more long-term weather averages for Mustique in September before you book your next holiday to St Vincent & the Grenadines in 2025/2026.

  • 29°C maximum daytime temperature in September in Mustique29
    29°C max day temperature
  • 7 hours of sunshine per day
  • 21 days with some rainfall in September in Mustique21
    21 days with some rainfall
  • 23°C minimum night-time temperature in September in Mustique23
    23°C min night temperature
  • 12 hours of daylight per day in September in Mustique12
    12 hours of daylight per day
  • Very high heat & humidity in September in MustiqueVH
    Very High heat & humidity
  • 270 mm monthly rainfall in September in Mustique270
    270 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in September in Mustique11
    11+ (Extreme) UV index
  • 29°C sea temperature in September in Mustique29
    29°C sea temperature

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The September weather guide for St Vincent & the Grenadines (Mustique) 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 Vincent & the Grenadines

How hot is it in Mustique in September?

Daytime temperatures usually reach 29°C in Mustique in September with very high heat and humidity, falling to 23°C at night.

How sunny is it in Mustique in September?

There are normally 7 hours of bright sunshine each day in Mustique in September - that's 61% of daylight hours.

How warm is the sea around Mustique in September?

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

Does it rain in Mustique in September?

There are usually 21 days with some rain in Mustique in September and the average monthly rainfall is 270mm.

What is the chance of a hurricane in Mustique in September?

On average less than 1 day in September in Mustique is likely to be affected by the passage of one or more tropical storms.

Mustique September sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Monday, 1st September 2025 05:54 18:15
Monday, 15th September 2025 05:54 18:06
Tuesday, 30th September 2025 05:54 17:55

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