Union Island weather in October 2025

Q: How hot is it in Union Island in October?

Daytime temperatures usually reach 30°C in Union Island in October with very high heat and humidity, falling to 23°C at night.

Q: How sunny is it in Union Island in October?

There are normally 7 hours of bright sunshine each day in Union Island in October - that's 61% of daylight hours.

Q: How warm is the sea around Union Island in October?

The average sea temperature around Union Island in October is 29°C.

Q: Does it rain in Union Island in October?

There are usually 18 days with some rain in Union Island in October and the average monthly rainfall is 207mm.

Q: What is the chance of a cyclone in Union Island in October?

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

Expect 86°F daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Union Island in October. Check more long-term weather averages for Union Island in October before you book your next holiday to St Vincent & the Grenadines in 2025/2026.

86
86°F max day temperature
7
7 hours of sunshine per day
18
18 days with some rainfall
73
73°F min night temperature
12
12 hours of daylight per day
VH
Very High heat & humidity
8.1
8.1 inches of monthly rainfall
11
11 (Extreme) UV index
84
84°F sea temperature

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The October weather guide for St Vincent & the Grenadines (Union Island) 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 Union Island in October?

Daytime temperatures usually reach 86°F in Union Island in October with very high heat and humidity, falling to 73°F at night.

How sunny is it in Union Island in October?

There are normally 7 hours of bright sunshine each day in Union Island in October - that's 61% of daylight hours.

How warm is the sea around Union Island in October?

The average sea temperature around Union Island in October is 84°F.

Does it rain in Union Island in October?

There are usually 18 days with some rain in Union Island in October and the average monthly rainfall is 8.1 inches.

What is the chance of a hurricane in Union Island in October?

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

Union Island October sunrise & sunset times

Browse the sunrise and sunset times for Union Island in October 2025. Select a month to view Union Island 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
Wednesday, 1st October 2025	05:55	17:55
Thursday, 16th October 2025	05:56	17:46
Friday, 31st October 2025	05:59	17:40

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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