Guam weather in July 2025

Expect 31°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Guam in July. Check more long-term weather averages for Guam in July before you book your next holiday to Guam in 2025/2026.

  • 31°C maximum daytime temperature in July in Guam (Agana)31
    31°C max day temperature
  • 5 hours of sunshine per day
  • 19 days with some rainfall in July in Guam (Agana)19
    19 days with some rainfall
  • 25°C minimum night-time temperature in July in Guam (Agana)25
    25°C min night temperature
  • 13 hours of daylight per day in July in Guam (Agana)13
    13 hours of daylight per day
  • Very high heat & humidity in July in Guam (Agana)VH
    Very High heat & humidity
  • 273 mm monthly rainfall in July in Guam (Agana)273
    273 mm of monthly rainfall
  • UV (maximum) index 11+ (Extreme) in July in Guam (Agana)11
    11+ (Extreme) UV index
  • 29°C sea temperature in July in Guam (Agana)29
    29°C sea temperature

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The July 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 Guam in July?

Daytime temperatures usually reach 31°C in Agana, Guam in July with very high heat and humidity, falling to 25°C at night.

How sunny is it in Guam in July?

There are normally 5 hours of bright sunshine each day in Agana, Guam in July - that's 41% of daylight hours.

How warm is the sea around Guam in July?

The average sea temperature around Agana, Guam in July is 29°C.

Does it rain in Guam in July?

There are usually 19 days with some rain in Agana, Guam in July and the average monthly rainfall is 273mm.

What is the chance of a typhoon in Guam in July?

On average 1.5 days in July in Agana, Guam are likely to be affected by the passage of one or more tropical storms.

Guam July sunrise & sunset times

Browse the sunrise and sunset times for Guam in July 2025. Select a month to view Guam sunrise and sunset times for the next 12 months. The Guam sunrise and sunset times shown below are for Agana.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st July 2025 05:58 18:52
Wednesday, 16th July 2025 06:02 18:52
Thursday, 31st July 2025 06:06 18:49

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