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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

Guam International Airport (PGUM)

Lat: 13.48°NLon: 144.8°EElev: 304ft.

A Few Clouds

79°F

26°C

Humidity 79%
Wind Speed E 9 mph
Barometer 29.82 in (1008.8 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index82°F (28°C)
Last update 25 Dec 1:54 am ChST
Extended Forecast for

3 Miles S Agat GU

  • Overnight

    Overnight: Scattered showers. Mostly cloudy, with a low around 79. East wind around 11 mph. Chance of precipitation is 40%.

    Low: 79 °F

    Scattered
    Showers

  • Christmas Day

    Christmas Day: Isolated showers. Partly sunny, with a high near 84. East southeast wind 11 to 15 mph, with gusts as high as 20 mph.

    High: 84 °F

    Isolated
    Showers

  • Thursday Night

    Thursday Night: Isolated showers. Partly cloudy, with a low around 79. East wind 8 to 13 mph.

    Low: 79 °F

    Isolated
    Showers

  • Friday

    Friday: Isolated showers. Mostly sunny, with a high near 83. East wind 8 to 11 mph.

    High: 83 °F

    Isolated
    Showers

  • Friday Night

    Friday Night: Isolated showers. Partly cloudy, with a low around 79. East wind 6 to 9 mph.

    Low: 79 °F

    Isolated
    Showers

  • Saturday

    Saturday: Isolated showers. Mostly sunny, with a high near 84.

    High: 84 °F

    Isolated
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 79.

    Low: 79 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 79.

    Low: 79 °F

    Partly Cloudy

Detailed Forecast

Overnight
Scattered showers. Mostly cloudy, with a low around 79. East wind around 11 mph. Chance of precipitation is 40%.
Christmas Day
Isolated showers. Partly sunny, with a high near 84. East southeast wind 11 to 15 mph, with gusts as high as 20 mph.
Thursday Night
Isolated showers. Partly cloudy, with a low around 79. East wind 8 to 13 mph.
Friday
Isolated showers. Mostly sunny, with a high near 83. East wind 8 to 11 mph.
Friday Night
Isolated showers. Partly cloudy, with a low around 79. East wind 6 to 9 mph.
Saturday
Isolated showers. Mostly sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 79.
Sunday
Mostly sunny, with a high near 86.
Sunday Night
Partly cloudy, with a low around 79.
Monday
Mostly sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 79.
Tuesday
Mostly sunny, with a high near 86.
Tuesday Night
Partly cloudy, with a low around 79.
Wednesday
Mostly sunny, with a high near 84.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Agat GU
 13.33°N 144.67°E
Last Update:
6:06 pm ChST Dec 24, 2025
Forecast Valid:
2am ChST Dec 25, 2025-6pm ChST Dec 31, 2025
 
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Additional Resources

Radar & Satellite Image

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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