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

85°F

29°C

Humidity 65%
Wind Speed E 16 mph
Barometer 29.80 in (1008.1 mb)
Dewpoint 72°F (22°C)
Visibility 10.00 mi
Heat Index91°F (33°C)
Last update 25 Dec 12:54 pm ChST
Extended Forecast for

Santa Rosa GU

  • Christmas Day

    Christmas Day: Isolated showers. Partly sunny, with a high near 86. East southeast wind 11 to 14 mph, with gusts as high as 18 mph.

    High: 86 °F

    Isolated
    Showers

  • Tonight

    Tonight: Isolated showers. Partly cloudy, with a low around 78. East wind 7 to 13 mph.

    Low: 78 °F

    Isolated
    Showers

  • Friday

    Friday: Isolated showers. Mostly sunny, with a high near 86. East wind 7 to 11 mph.

    High: 86 °F

    Isolated
    Showers

  • Friday Night

    Friday Night: Isolated showers. Partly cloudy, with a low around 78. East wind 6 to 9 mph.

    Low: 78 °F

    Isolated
    Showers

  • Saturday

    Saturday: Isolated showers. Mostly sunny, with a high near 87. East wind 7 to 10 mph.

    High: 87 °F

    Isolated
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 78.

    Low: 78 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 88.

    High: 88 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 78.

    Low: 78 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

Detailed Forecast

Christmas Day
Isolated showers. Partly sunny, with a high near 86. East southeast wind 11 to 14 mph, with gusts as high as 18 mph.
Tonight
Isolated showers. Partly cloudy, with a low around 78. East wind 7 to 13 mph.
Friday
Isolated showers. Mostly sunny, with a high near 86. East wind 7 to 11 mph.
Friday Night
Isolated showers. Partly cloudy, with a low around 78. East wind 6 to 9 mph.
Saturday
Isolated showers. Mostly sunny, with a high near 87. East wind 7 to 10 mph.
Saturday Night
Partly cloudy, with a low around 78.
Sunday
Mostly sunny, with a high near 88.
Sunday Night
Partly cloudy, with a low around 78.
Monday
Mostly sunny, with a high near 87.
Monday Night
Partly cloudy, with a low around 78.
Tuesday
Mostly sunny, with a high near 88.
Tuesday Night
Partly cloudy, with a low around 78.
Wednesday
Mostly sunny, with a high near 87.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Santa Rosa GU
 13.4°N 144.67°E
Last Update:
6:06 am ChST Dec 25, 2025
Forecast Valid:
1pm ChST Dec 25, 2025-6pm ChST Dec 31, 2025
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation