Agana weather in January 2025

Expect 30°C daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Agana in January. Check more long-term weather averages for Agana in January before you book your next holiday to Guam in 2025/2026.

  • 30°C maximum daytime temperature in January in Agana30
    30°C max day temperature
  • 6 hours of sunshine per day
  • 23 days with some rainfall in January in Agana23
    23 days with some rainfall
  • 24°C minimum night-time temperature in January in Agana24
    24°C min night temperature
  • 11 hours of daylight per day in January in Agana11
    11 hours of daylight per day
  • High heat & humidity in January in AganaH
    High heat & humidity
  • 130 mm monthly rainfall in January in Agana130
    130 mm of monthly rainfall
  • UV (maximum) index 10 (Very High) in January in Agana10
    10 (Very High) UV index
  • 28°C sea temperature in January in Agana28
    28°C sea temperature

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The January 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 / mm)  |  Imperial (°F / inches)

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How hot is it in Agana in January?

Daytime temperatures usually reach 30°C in Agana in January with high heat and humidity, falling to 24°C at night.

How sunny is it in Agana in January?

There are normally 6 hours of bright sunshine each day in Agana in January - that's 50% of daylight hours.

How warm is the sea around Agana in January?

The average sea temperature around Agana in January is 28°C.

Does it rain in Agana in January?

There are usually 23 days with some rain in Agana in January and the average monthly rainfall is 130mm.

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

On average less than 1 day in January in Agana is likely to be affected by the passage of one or more tropical storms.

Agana January sunrise & sunset times

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


Date Sunrise times Sunset times
Wednesday, 1st January 2025 06:44 18:05
Thursday, 16th January 2025 06:48 18:14
Friday, 31st January 2025 06:48 18:21

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