Major Winter Storm to Bring Heavy Snow and Ice Impacts; Dangerously Cold in the North-Central U.S.

A large, long-duration winter storm is expected to bring widespread heavy snow, sleet, and freezing rain from the Southern Rockies/Plains into the Mid-South beginning Friday, spreading eastward to the Mid-Atlantic and New England this weekend. An Arctic front will bring frigid temperatures and gusty winds that will lead to dangerous wind chills from the Northern Plains and Upper Midwest. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Mist

52°F

11°C

Humidity 87%
Wind Speed SE 3 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 48°F (9°C)
Visibility 3.50 mi
Last update 22 Jan 09:00 AM PST
Extended Forecast for

San Mateo CA

  • Today

    Today: Patchy fog before 10am.  Otherwise, mostly sunny, with a high near 64. Calm wind becoming north around 5 mph in the afternoon.

    High: 64 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Patchy fog.  Otherwise, increasing clouds, with a low around 46. Calm wind.

    Low: 46 °F

    Patchy Fog

  • Friday

    Friday: Areas of fog before 11am.  Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 59. Calm wind becoming north around 5 mph in the afternoon.

    High: 59 °F

    Areas Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Patchy fog.  Otherwise, mostly clear, with a low around 44. Light north northeast wind.

    Low: 44 °F

    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 8am.  Otherwise, sunny, with a high near 62. Calm wind becoming north northeast 5 to 8 mph in the morning.

    High: 62 °F

    Patchy Fog
    then Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 62.

    High: 62 °F

    Mostly Sunny

Detailed Forecast

Today
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 64. Calm wind becoming north around 5 mph in the afternoon.
Tonight
Patchy fog. Otherwise, increasing clouds, with a low around 46. Calm wind.
Friday
Areas of fog before 11am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 59. Calm wind becoming north around 5 mph in the afternoon.
Friday Night
Patchy fog. Otherwise, mostly clear, with a low around 44. Light north northeast wind.
Saturday
Patchy fog before 8am. Otherwise, sunny, with a high near 62. Calm wind becoming north northeast 5 to 8 mph in the morning.
Saturday Night
Mostly clear, with a low around 42.
Sunday
Partly sunny, with a high near 61.
Sunday Night
Mostly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 62.
Monday Night
Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 44.
Tuesday
Patchy fog. Otherwise, partly sunny, with a high near 62.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 49.
Wednesday
A chance of rain. Mostly cloudy, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
San Mateo CA
 37.54°N 122.32°W (Elev. 194 ft)
3:11 am PST Jan 22, 2026
9am PST Jan 22, 2026-6pm PST Jan 28, 2026
 
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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