Significant and Catastrophic Flooding in the Pacific Northwest; Very Cold Temperatures in the Northern Plains

The atmospheric river over the Pacific Northwest will begin to subside today, but lingering rainfall will exacerbate ongoing catastrophic major river flooding, and landslides will continue across portions of western Washington and northwest Oregon for several days. Arctic air will plummet southward into the Northern Plains today, bringing cold air in the single digits to the region by Friday. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

Lat: 37.61961°NLon: 122.36558°WElev: 10.0ft.

Partly Cloudy

46°F

8°C

Humidity 93%
Wind Speed ESE 3 MPH
Barometer 30.15 in (1021.0 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 11 Dec 06:00 AM PST
Extended Forecast for

Belmont CA

  • Today

    Today: Sunny, with a high near 61. North wind around 6 mph.

    High: 61 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 45. Calm wind becoming east southeast around 5 mph.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 62. Calm wind becoming northeast around 5 mph in the morning.

    High: 62 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44. Calm wind.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 64. Calm wind becoming west around 6 mph in the afternoon.

    High: 64 °F

    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 2am.  Otherwise, mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 7am.  Otherwise, mostly sunny, with a high near 63.

    High: 63 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 45.

    Low: 45 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of rain after 4pm.  Patchy fog before 7am.  Otherwise, partly sunny, with a high near 63.

    High: 63 °F

    Patchy Fog
    then Slight
    Chance Rain

Detailed Forecast

Today
Sunny, with a high near 61. North wind around 6 mph.
Tonight
Mostly clear, with a low around 45. Calm wind becoming east southeast around 5 mph.
Friday
Sunny, with a high near 62. Calm wind becoming northeast around 5 mph in the morning.
Friday Night
Mostly clear, with a low around 44. Calm wind.
Saturday
Sunny, with a high near 64. Calm wind becoming west around 6 mph in the afternoon.
Saturday Night
Patchy fog after 2am. Otherwise, mostly clear, with a low around 45.
Sunday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 63.
Sunday Night
Partly cloudy, with a low around 45.
Monday
A slight chance of rain after 4pm. Patchy fog before 7am. Otherwise, partly sunny, with a high near 63.
Monday Night
A chance of rain, mainly after 10pm. Mostly cloudy, with a low around 50.
Tuesday
A chance of rain. Patchy fog. Otherwise, partly sunny, with a high near 63.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 52.
Wednesday
A chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
Belmont CA
 37.52°N 122.31°W (Elev. 397 ft)
2:25 am PST Dec 11, 2025
6am PST Dec 11, 2025-6pm PST Dec 17, 2025
 
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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