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

Snow Squalls May Impact the Northeast on Thursday; Dangerously Cold Arctic Air Impact the North-Central US

Snow showers and snow squalls are likely to develop across the Northeast on Thursday. Lake effect snow will persist downwind of the Great Lakes. An arctic blast will bring frigid temperatures, gusty winds and dangerous wind chills to the Northern Plains before expanding to the South and East. A major winter storm will begin impacting the Southern Plains and Lower Mississippi Valley Friday. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Partly Cloudy

54°F

12°C

Humidity 81%
Wind Speed NNW 4 MPH
Barometer 30.06 in (1017.95 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 21 Jan 10:20 PM PST
Extended Forecast for

Foster City CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 47. Calm wind.

    Low: 47 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 62. Calm wind becoming north northwest around 5 mph in the afternoon.

    High: 62 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Patchy fog after midnight. Otherwise, increasing clouds, with a low around 48. Light southwest wind.

    Low: 48 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Light and variable wind.

    High: 60 °F

    Patchy Fog
    then Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44. Light and variable wind.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 62.

    High: 62 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Partly sunny, with a high near 62.

    High: 62 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 47. Calm wind.
Thursday
Mostly sunny, with a high near 62. Calm wind becoming north northwest around 5 mph in the afternoon.
Thursday Night
Patchy fog after midnight. Otherwise, increasing clouds, with a low around 48. Light southwest wind.
Friday
Patchy fog before 10am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 60. Light and variable wind.
Friday Night
Mostly clear, with a low around 44. Light and variable wind.
Saturday
Sunny, with a high near 62.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Partly sunny, with a high near 62.
Sunday Night
Mostly cloudy, with a low around 43.
Monday
Mostly sunny, with a high near 62.
Monday Night
Partly cloudy, with a low around 43.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 46.
Wednesday
A slight chance of rain. Mostly cloudy, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Foster City CA
 37.57°N 122.27°W (Elev. 3 ft)
Last Update:
2:22 pm PST Jan 21, 2026
Forecast Valid:
10pm PST Jan 21, 2026-6pm PST Jan 28, 2026
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation