Mustique weather in September 2025

Q: 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.

Q: 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.

Q: How warm is the sea around Mustique in September?

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

Q: 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.

Q: What is the chance of a cyclone 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.

Expect 84°F 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.

84
84°F max day temperature
7
7 hours of sunshine per day
21
21 days with some rainfall
73
73°F min night temperature
12
12 hours of daylight per day
VH
Very High heat & humidity
10.6
10.6 inches of monthly rainfall
11
11+ (Extreme) UV index
84
84°F 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) | Imperial (°F)

More about St Vincent & the Grenadines

How hot is it in Mustique in September?

Daytime temperatures usually reach 84°F in Mustique in September with very high heat and humidity, falling to 73°F 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 84°F.

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 10.6 inches.

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.

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

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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St Vincent and the Grenadines - quick facts
Flight time^✝	11 hours
Time difference	UK -4 hours
Language(s)	English
Currency	Eastern Caribbean Dollar
Electricity	A + B + G plug (110V)
Driving side	Left
Why visit?	Beaches Nature
Tourist info	St. Vincent & the Grenadines Tourism Authority