Guam weather forecast

Get the latest coronavirus (Covid-19) updates for Guam with current travel advice and statistics on new cases per 100,000 and vaccine.

Last updated at 04:00 on Wednesday 22nd September 2021 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.

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 Thursday 23rd September 2021

Below is the Guam weather forecast for Thursday 23rd September 2021. Expect isolated thunderstorms in Guam with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 7 (High) and 4 hours of bright sunshine. There are 50 mm or more of rainfall expected with 100% chance of some rain and a moderate breeze of 22 kph from the south.

  • 31°C maximum temperature31
    °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 7 (High)7
    UV index (High)
  • 100% chance of some rain100
    % chance of some rain
  • 50 mm or more of rainfall expected>50
    mm or more of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Moderate breeze of 22 kph from the South22
    kph wind from S

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Guam weather for Friday 24th September 2021

Below is the Guam weather forecast for Friday 24th September 2021. Expect isolated thunderstorms in Guam with a maximum temperature of 31°C, high levels of heat & humidity, maximum UV of 7 (High) and 5 hours of bright sunshine. There are 20-30 mm of rainfall expected with 92% chance of some rain and a gentle breeze of 19 kph from the south.

  • 31°C maximum temperature31
    °C maximum temperature
  • 27°C minimum temperature27
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 7 (High)7
    UV index (High)
  • 92% chance of some rain92
    % chance of some rain
  • 20-30 mm of rainfall expected<30
    mm of rainfall expected
  • High heat & humidityH
    high heat & humidity
  • Gentle breeze of 19 kph from the South19
    kph wind from S

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Guam weather for Saturday 25th September 2021

Below is the Guam weather forecast for Saturday 25th September 2021. Expect isolated thunderstorms in Guam with a maximum temperature of 31°C, high levels of heat & humidity, maximum UV of 11 (Extreme) and 4 hours of bright sunshine. There are 10-20 mm of rainfall expected with 66% chance of some rain and a gentle breeze of 14 kph from the south-west.

  • 31°C maximum temperature31
    °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 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 14 kph from the South-West14
    kph wind from SW

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Guam weather for Sunday 26th September 2021

Below is the Guam weather forecast for Sunday 26th September 2021. Expect isolated thunderstorms in Guam with a maximum temperature of 31°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 60% chance of some rain and a gentle breeze of 18 kph from the south-west.

  • 31°C maximum temperature31
    °C maximum temperature
  • 27°C minimum temperature27
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 11+ (Extreme)11
    UV index (Extreme)
  • 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 South-West18
    kph wind from SW

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Guam weather for Monday 27th September 2021

Below is the Guam weather forecast for Monday 27th September 2021. Expect isolated thunderstorms in Guam with a maximum temperature of 31°C, high levels of heat & humidity, maximum UV of 11 (Extreme) and 5 hours of bright sunshine. There are 10-20 mm of rainfall expected with 58% chance of some rain and a gentle breeze of 16 kph from the south-west.

  • 31°C maximum temperature31
    °C maximum temperature
  • 27°C minimum temperature27
    °C minimum temperature
  • Isolated thunderstorms
    isolated thunderstorms
  • 5 hours of bright sunshine5
    hours of sunshine
  • UV (maximum) index 11 (Extreme)11
    UV index (Extreme)
  • 58% chance of some rain58
    % chance of some rain
  • 10-20 mm of rainfall expected<20
    mm of rainfall expected
  • Moderate heat & humidityM
    moderate heat & humidity
  • Gentle breeze of 16 kph from the South-West16
    kph wind from SW

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

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