Agana weather in August 2025

Expect daytime maximum temperatures of 88°F in Agana, Guam in August and very high heat and humidity based on long-term weather averages. There are 5 hours of sunshine per day on average with 20 days with some rainfall and typically 14.3 inches of rainfall in the month.

  • 88°F maximum daytime temperature in August in Agana88
    88°F max day temperature
  • 5 hours of sunshine per day
  • 20 days with some rainfall in August in Agana20
    20 days with some rainfall
  • 77°F minimum night-time temperature in August in Agana77
    77°F min night temperature
  • 13 hours of daylight per day in August in Agana13
    13 hours of daylight per day
  • Very high heat & humidity in August in AganaVH
    Very High heat & humidity
  • 14.3 inches monthly rainfall in August in Agana14.3
    14.3 inches of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in August in Agana11
    11+ (Extreme) UV index
  • 84°F sea temperature in August in Agana84
    84°F sea temperature

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The August weather guide for Guam, represented by Agana, (Agana) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C)  |  Imperial (°F)

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How hot is it in Agana in August?

Daytime temperatures usually reach 88°F in Agana in August with very high heat and humidity, falling to 77°F at night.

How sunny is it in Agana in August?

There are normally 5 hours of bright sunshine each day in Agana in August - that's 37% of daylight hours.

How warm is the sea around Agana in August?

The average sea temperature around Agana in August is 84°F.

Does it rain in Agana in August?

There are usually 20 days with some rain in Agana in August and the average monthly rainfall is 14.3 inches.

What is the chance of a typhoon in Agana in August?

On average 2.2 days in August in Agana are likely to be affected by the passage of one or more tropical storms.

Agana August sunrise & sunset times

Browse the sunrise and sunset times for Agana in August 2025. Select a month to view Agana sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 06:06 18:49
Saturday, 16th August 2025 06:08 18:42
Sunday, 31st August 2025 06:10 18:33

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