Agana weather

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The weather guide for Agana, Guam 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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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.

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

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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)
30
5
30
7
30
13
31
19
31
24
31
29
31
31
31
30
31
26
31
20
31
14
30
8
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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

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Tropical storm risk: Agana, Guam typhoon season

% of month affected by tropical storms
1.3%
0
0
1.4%
1.8%
1.7%
4.7%
6.9%
7.6%
7.9%
4.5%
2%
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

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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