Guam weather forecast

Get the latest coronavirus (COVID-19) updates for Guam with current travel advice, statistics and online resources.

Last updated at 04:00 on Saturday 19th September 2020 GMT

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The 5-day weather forecast for Guam is provided by the Swiss meteorological agency, MeteoBlue. Find out more about our data sources.

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Guam weather forecast by day

Below are the detailed weather forecasts for Guam for the next 5 days. The forecasts shown are for Agana and may not represent the whole of Guam. Browse more destinations in Guam to view more weather forecasts.

Guam weather for Sunday 20th September 2020

Below is the Guam weather forecast for Sunday 20th September 2020. Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 9 (Very High) and 5 hours of bright sunshine. There are 10-20 mm of rainfall expected with 60% chance of some rain and a gentle breeze of 18 kph from the south.

  • 30°C maximum temperature30
    °C maximum temperature
  • 26°C minimum temperature26
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 9 (Very High)9
    UV index (Very High)
  • 60% chance of some rain60
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Gentle breeze of 18 kph from the South18
    kph wind from S

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Guam weather for Monday 21st September 2020

Below is the Guam weather forecast for Monday 21st September 2020. Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11 (Extreme) and 5 hours of bright sunshine. There are 10-20 mm of rainfall expected with 66% chance of some rain and a gentle breeze of 18 kph from the south-west.

  • 30°C maximum temperature30
    °C maximum temperature
  • 26°C minimum temperature26
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 11 (Extreme)11
    UV index (Extreme)
  • 66% chance of some rain66
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Gentle breeze of 18 kph from the South-West18
    kph wind from SW

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Guam weather for Tuesday 22nd September 2020

Below is the Guam weather forecast for Tuesday 22nd September 2020. Expect isolated thunderstorms in Guam with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 6 hours of bright sunshine. There are 2-5 mm of rainfall expected with 35% chance of some rain and a light breeze of 9 kph from the south.

  • 30°C maximum temperature30
    °C maximum temperature
  • 26°C minimum temperature26
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 11+ (Extreme)11
    UV index (Extreme)
  • 35% chance of some rain35
    % chance of some rain
  • 2-5 mm of rainfall expected<5
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Light breeze of 9 kph from the South9
    kph wind from S

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Guam weather for Wednesday 23rd September 2020

Below is the Guam weather forecast for Wednesday 23rd September 2020. Expect isolated thunderstorms in Guam with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 7 hours of bright sunshine. There are 5-10 mm of rainfall expected with 55% chance of some rain and a gentle breeze of 16 kph from the north-east.

  • 31°C maximum temperature31
    °C maximum temperature
  • 26°C minimum temperature26
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 7 hours of bright sunshine7
    hours of sunshine
  • UV (maximum) index 11+ (Extreme)11
    UV index (Extreme)
  • 55% chance of some rain55
    % chance of some rain
  • 5-10 mm of rainfall expected<10
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Gentle breeze of 16 kph from the North-East16
    kph wind from NE

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Guam weather for Thursday 24th September 2020

Below is the Guam weather forecast for Thursday 24th September 2020. Expect isolated thunderstorms in Guam with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 11+ (Extreme) and 6 hours of bright sunshine. There are 10-20 mm of rainfall expected with 80% chance of some rain and a gentle breeze of 14 kph from the north-east.

  • 31°C maximum temperature31
    °C maximum temperature
  • 27°C minimum temperature27
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 6 hours of bright sunshine6
    hours of sunshine
  • UV (maximum) index 11+ (Extreme)11
    UV index (Extreme)
  • 80% chance of some rain80
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Gentle breeze of 14 kph from the North-East14
    kph wind from NE

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

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