Union Island weather live forecast

Today's maximum temperature in Union Island is expected to be 82°F. 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 23rd July 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 23rd July 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 82°F, low levels of heat & humidity, maximum UV of 7 (High) and 6 hours of bright sunshine. There are 10-20 mm of rainfall expected with 87% chance of some rain and a moderate breeze of 12 mph from the east.

  • 82°F maximum temperature82
    °F maximum temperature
  • 81°F minimum temperature81
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 87% chance of some rain87
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 12 mph from the East12
    mph wind from E

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Union Island weather for Thursday 24th July 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 10 (Very High) and 4 hours of bright sunshine. There are 20-30 mm of rainfall expected with 71% chance of some rain and a moderate breeze of 17 mph from the east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 81°F minimum temperature81
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 10 (Very High)10
    UV index (Very High)
  • 71% chance of some rain71
    % chance of some rain
  • 20-30 mm of rainfall expected<30
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 17 mph from the East17
    mph wind from E

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Union Island weather for Friday 25th July 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 11 (Extreme) and 7 hours of bright sunshine. There are 10-20 mm of rainfall expected with 84% chance of some rain and a moderate breeze of 17 mph from the east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 81°F minimum temperature81
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 11 (Extreme)11
    UV index (Extreme)
  • 84% chance of some rain84
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 17 mph from the East17
    mph wind from E

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Union Island weather for Saturday 26th July 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 11 (Extreme) and 4 hours of bright sunshine. There are 20-30 mm of rainfall expected with 65% chance of some rain and a moderate breeze of 12 mph from the east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 79°F minimum temperature79
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 4 hours of bright sunshine4
    hours of sunshine
  • UV (maximum) index 11 (Extreme)11
    UV index (Extreme)
  • 65% chance of some rain65
    % chance of some rain
  • 20-30 mm of rainfall expected<30
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Moderate breeze of 12 mph from the East12
    mph wind from E

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Union Island weather for Sunday 27th July 2025

Expect isolated thunderstorms in Union Island, St Vincent & the Grenadines with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 11+ (Extreme) and 6 hours of bright sunshine. There are 10-20 mm of rainfall expected with 79% chance of some rain and a gentle breeze of 12 mph from the south-east.

  • 81°F maximum temperature81
    °F maximum temperature
  • 81°F minimum temperature81
    °F minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 11+ (Extreme)11
    UV index (Extreme)
  • 79% chance of some rain79
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Low heat & humidityL
    low heat & humidity
  • Gentle breeze of 12 mph from the South-East12
    mph wind from SE

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