Union Island weather in June 2025

Expect 30°C daytime maximum temperatures in the shade with on average 7 hours of sunshine per day in Union Island in June. Check more long-term weather averages for Union Island in June before you book your next holiday to St Vincent & the Grenadines in 2025/2026.

  • 30°C maximum daytime temperature in June in Union Island30
    30°C max day temperature
  • 7 hours of sunshine per day
  • 18 days with some rainfall in June in Union Island18
    18 days with some rainfall
  • 23°C minimum night-time temperature in June in Union Island23
    23°C min night temperature
  • 13 hours of daylight per day in June in Union Island13
    13 hours of daylight per day
  • High heat & humidity in June in Union IslandH
    High heat & humidity
  • 155 mm monthly rainfall in June in Union Island155
    155 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in June in Union Island11
    11+ (Extreme) UV index
  • 27°C sea temperature in June in Union Island27
    27°C sea temperature

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The June 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 June?

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

How sunny is it in Union Island in June?

There are normally 7 hours of bright sunshine each day in Union Island in June - that's 54% of daylight hours.

How warm is the sea around Union Island in June?

The average sea temperature around Union Island in June is 27°C.

Does it rain in Union Island in June?

There are usually 18 days with some rain in Union Island in June and the average monthly rainfall is 155mm.

Union Island June sunrise & sunset times

Browse the sunrise and sunset times for Union Island in June 2025. Select a month to view Union Island sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Sunday, 1st June 2025 05:39 18:28
Sunday, 15th June 2025 05:40 18:32
Monday, 30th June 2025 05:44 18:35

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