Union Island weather in October 2025

Expect 30°C 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.

  • 30°C maximum daytime temperature in October in Union Island30
    30°C max day temperature
  • 7 hours of sunshine per day
  • 18 days with some rainfall in October in Union Island18
    18 days with some rainfall
  • 23°C minimum night-time temperature in October in Union Island23
    23°C min night temperature
  • 12 hours of daylight per day in October in Union Island12
    12 hours of daylight per day
  • Very high heat & humidity in October in Union IslandVH
    Very High heat & humidity
  • 207 mm monthly rainfall in October in Union Island207
    207 mm of monthly rainfall
  • UV (maximum) index 11 (Extreme) in October in Union Island11
    11 (Extreme) UV index
  • 29°C sea temperature in October in Union Island29
    29°C 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 / mm)  |  Imperial (°F / inches)

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More about St Vincent & the Grenadines

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.

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 29°C.

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.

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.

JanFebMarAprMayJunJulAugSepOctNovDec

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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