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

Heavy Rainfall to Bring Flooding Threat to California; Heavy Snow in the Sierra

A strong atmospheric river will bring heavy rainfall to California through the holiday week. The heaviest rainfall is expected on Wednesday in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall is expected in the Sierra Nevada from the atmospheric river, raising concerns for major snow‐load impacts. Travel may be difficult to impossible over the passes. Read More >

Current conditions at

Andersen, Mariana Is, Andersen Air Force Base (PGUA)

Lat: 13.58°NLon: 144.93°EElev: 614ft.

Mostly Cloudy

80°F

27°C

Humidity 78%
Wind Speed E 14 mph
Barometer 29.83 in (1009.2 mb)
Dewpoint 73°F (23°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 24 Dec 6:55 pm ChST
Extended Forecast for

Andersen AFB GU

  • Tonight

    Tonight: Scattered showers. Mostly cloudy, with a low around 77. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.

    Low: 77 °F

    Scattered
    Showers

  • Christmas Day

    Christmas Day: Isolated showers. Partly sunny, with a high near 87. East wind 11 to 16 mph, with gusts as high as 21 mph.

    High: 87 °F

    Isolated
    Showers

  • Thursday Night

    Thursday Night: Isolated showers. Partly cloudy, with a low around 77. East wind 8 to 15 mph, with gusts as high as 20 mph.

    Low: 77 °F

    Isolated
    Showers

  • Friday

    Friday: Isolated showers. Mostly sunny, with a high near 86. East wind 8 to 11 mph.

    High: 86 °F

    Isolated
    Showers

  • Friday Night

    Friday Night: Isolated showers. Partly cloudy, with a low around 77. East wind 6 to 9 mph.

    Low: 77 °F

    Isolated
    Showers

  • Saturday

    Saturday: Isolated showers. Mostly sunny, with a high near 88.

    High: 88 °F

    Isolated
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 77.

    Low: 77 °F

    Partly Cloudy

Detailed Forecast

Tonight
Scattered showers. Mostly cloudy, with a low around 77. East wind 10 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%.
Christmas Day
Isolated showers. Partly sunny, with a high near 87. East wind 11 to 16 mph, with gusts as high as 21 mph.
Thursday Night
Isolated showers. Partly cloudy, with a low around 77. East wind 8 to 15 mph, with gusts as high as 20 mph.
Friday
Isolated showers. Mostly sunny, with a high near 86. East wind 8 to 11 mph.
Friday Night
Isolated showers. Partly cloudy, with a low around 77. East wind 6 to 9 mph.
Saturday
Isolated showers. Mostly sunny, with a high near 88.
Saturday Night
Partly cloudy, with a low around 77.
Sunday
Mostly sunny, with a high near 89.
Sunday Night
Partly cloudy, with a low around 77.
Monday
Mostly sunny, with a high near 88.
Monday Night
Partly cloudy, with a low around 77.
Tuesday
Mostly sunny, with a high near 89.
Tuesday Night
Partly cloudy, with a low around 77.
Wednesday
Mostly sunny, with a high near 88.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Andersen AFB GU
 13.59°N 144.93°E
Last Update:
6:06 pm ChST Dec 24, 2025
Forecast Valid:
7pm ChST Dec 24, 2025-6pm ChST Dec 31, 2025
 
Forecast Discussion
 
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