National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Guam International Airport (PGUM)

Lat: 13.48°NLon: 144.8°EElev: 304ft.

Partly Cloudy

87°F

31°C

Humidity 80%
Wind Speed W 9 mph
Barometer 29.89 in (1011.2 mb)
Dewpoint 80°F (27°C)
Visibility 10.00 mi
Heat Index103°F (39°C)
Last update 19 Sep 9:54 am ChST
Extended Forecast for

Umatac GU

  • Today

    Today: Scattered showers and thunderstorms. Partly sunny, with a high near 86. West southwest wind around 14 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.

    High: 86 °F

    Scattered
    Showers

  • Tonight

    Tonight: Scattered showers and thunderstorms. Mostly cloudy, with a low around 79. West wind 7 to 13 mph. Chance of precipitation is 40%.

    Low: 79 °F

    Scattered
    Showers

  • Sunday

    Sunday: Scattered showers and thunderstorms. Partly sunny, with a high near 86. West wind 6 to 8 mph becoming south in the morning. Chance of precipitation is 40%.

    High: 86 °F

    Scattered
    Showers

  • Sunday Night

    Sunday Night: Scattered showers and thunderstorms. Mostly cloudy, with a low around 79. West southwest wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 40%.

    Low: 79 °F

    Scattered
    Showers

  • Monday

    Monday: Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. Light and variable wind becoming south southeast 5 to 7 mph in the morning. Chance of precipitation is 50%.

    High: 86 °F

    Scattered
    Showers

  • Monday Night

    Monday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 79.

    Low: 79 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A 50 percent chance of showers. Mostly cloudy, with a high near 85.

    High: 85 °F

    Chance
    Showers

  • Tuesday Night

    Tuesday Night: A chance of showers. Mostly cloudy, with a low around 79.

    Low: 79 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Partly sunny, with a high near 86.

    High: 86 °F

    Chance
    Showers

Detailed Forecast

Today
Scattered showers and thunderstorms. Partly sunny, with a high near 86. West southwest wind around 14 mph, with gusts as high as 18 mph. Chance of precipitation is 50%.
Tonight
Scattered showers and thunderstorms. Mostly cloudy, with a low around 79. West wind 7 to 13 mph. Chance of precipitation is 40%.
Sunday
Scattered showers and thunderstorms. Partly sunny, with a high near 86. West wind 6 to 8 mph becoming south in the morning. Chance of precipitation is 40%.
Sunday Night
Scattered showers and thunderstorms. Mostly cloudy, with a low around 79. West southwest wind around 6 mph becoming light and variable in the evening. Chance of precipitation is 40%.
Monday
Scattered showers and thunderstorms. Mostly cloudy, with a high near 86. Light and variable wind becoming south southeast 5 to 7 mph in the morning. Chance of precipitation is 50%.
Monday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 79.
Tuesday
A 50 percent chance of showers. Mostly cloudy, with a high near 85.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 79.
Wednesday
A chance of showers. Partly sunny, with a high near 86.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 80.
Thursday
A chance of showers. Partly sunny, with a high near 85.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 80.
Friday
A chance of showers. Partly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Umatac GU
 13.31°N 144.67°E
Last Update:
6:05 am ChST Sep 19, 2026
Forecast Valid:
10am ChST Sep 19, 2026-6pm ChST Sep 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation