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Agana weather
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Usually
in September
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Now
Today
Recommended for Guam
The weather guide for Guam, represented by Agana, (Agana) shows long term weather averages processed from data supplied by CRU (University of East Anglia) & today's weather forecast provided by meteoblue. Find out more about our data sources.
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Metric (°C / mm) | Imperial (°F / inches)
Tropical storm risk: Agana, Guam typhoon season
% of month affected by tropical storms
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The Agana, Guam tropical storm risk chart above shows the typhoon season. The chart was processed from data supplied by the US Meteorological Agency (NOAA). Find out more about our data sources.
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Which is the hottest month in Agana?
The hottest time of year in Agana is normally September. Expect maximum daytime temperatures to reach 31°C with very high heat and humidity.
Which month has the most rain in Agana?
In terms of rainfall, August is usually the wettest month in Agana with 363mm on average. There are normally 20 days in August with some rain.
When is it sunniest in Agana?
The sunniest time of year in Agana is normally March with bright sunshine on average for 58% of daylight hours; that's 7 hours of sunshine per day.
When is the sea warmest in Agana?
The sea is usually at its warmest in Agana in August when the water temperature reaches 29°C.
What is the time difference between Guam and the UK?
The time difference between Guam and the UK is GMT+10 hours.
What is the main language spoken in Guam?
The main language spoken in Guam is English.
Learn a language for Guam with Busuu*, Lingoda* and Rocket Languages*.
What is the currency in Guam?
The currency in Guam is the US Dollar (USD).
Send money to Guam with Monito*.
Which plugs are used in Guam?
Guam uses electrical plug type A + B (110 Volts).
Which side of the road do they drive on in Guam?
They drive on the right side of the road in Guam.
Do you need a visa for Guam?
Yes, UK passport holders do need a visa to enter Guam.
Check Guam visa requirements for all passport holders with VisaHQ*.
Compare Agana weather with the USA
Below the Agana weather chart shows average maximum daytime temperature for Agana, Guam and the USA (Washington).
Maximum daytime temperature (°C)
Agana, Guam
USA (Washington)
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Metric (°C / mm) | Imperial (°F / inches)
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