Union Island weather live forecast

Today's maximum temperature in Union Island is expected to be 29°C. Select a day from the live weather forecast for Union Island, St Vincent & the Grenadines for more weather parameters.

5-day weather forecast updated at 04:01 on Wednesday 29th October 2025 GMT

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The 5-day weather forecast for St Vincent & the Grenadines (Union Island) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Union Island weather forecast by day

Below are the detailed weather forecasts for Union Island for the next 5 days.

Union Island weather for Wednesday 29th October 2025

Expect broken clouds in Union Island, St Vincent & the Grenadines with a maximum temperature of 29°C, moderate levels of heat & humidity, maximum UV of 10 (Very High) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the south-east.

  • 29°C maximum temperature29
    °C maximum temperature
  • 28°C minimum temperature28
    °C minimum temperature
  • Broken clouds
    broken clouds
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 10 (Very High)10
    UV index (Very High)
  • 0 mm of rainfall expected0
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Moderate breeze of 23 kph from the South-East23
    kph wind from SE

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Union Island weather for Thursday 30th October 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 28°C, moderate levels of heat & humidity, maximum UV of 8 (Very High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 38% chance of some rain and a moderate breeze of 20 kph from the east.

  • 28°C maximum temperature28
    °C maximum temperature
  • 28°C minimum temperature28
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 38% chance of some rain38
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Moderate breeze of 20 kph from the East20
    kph wind from E

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Union Island weather for Friday 31st October 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 10 (Very High) and 3 hours of bright sunshine. There are 10-20 mm of rainfall expected with 80% chance of some rain and a moderate breeze of 23 kph from the east.

  • 28°C maximum temperature28
    °C maximum temperature
  • 27°C minimum temperature27
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 3 hours of bright sunshine3
    hours of sunshine
  • UV (maximum) index 10 (Very High)10
    UV index (Very High)
  • 80% chance of some rain80
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 23 kph from the East23
    kph wind from E

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Union Island weather for Saturday 1st November 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 8 (Very High) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 83% chance of some rain and a fresh breeze of 30 kph from the east.

  • 28°C maximum temperature28
    °C maximum temperature
  • 27°C minimum temperature27
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 8 (Very High)8
    UV index (Very High)
  • 83% chance of some rain83
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Fresh breeze of 30 kph from the East30
    kph wind from E

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Union Island weather for Sunday 2nd November 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 28°C, low levels of heat & humidity, maximum UV of 11 (Extreme) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 24% chance of some rain and a fresh breeze of 33 kph from the east.

  • 28°C maximum temperature28
    °C maximum temperature
  • 28°C minimum temperature28
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 11 (Extreme)11
    UV index (Extreme)
  • 24% chance of some rain24
    % chance of some rain
  • 0-2 mm of rainfall expected<2
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Fresh breeze of 33 kph from the East33
    kph wind from E

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Metric (°C / mm)  |  Imperial (°F / inches)

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