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

Tracking Winter Weather and Frigid Temperatures This Weekend

Another clipper will drop into the Northern Plains and Upper Midwest into Sunday with snow and gusty winds contributing to some areas of blizzard conditions and snow squalls. Impactful snowfall will occur up and down the East Coast Sunday extending from the western Florida Panhandle to Maine. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Mist

54°F

12°C

Humidity 93%
Wind Speed NNE 6 MPH
Barometer 30.17 in (1021.67 mb)
Dewpoint 52°F (11°C)
Visibility 3.00 mi
Last update 18 Jan 01:30 AM PST
Extended Forecast for

Foster City CA

  • Overnight

    Overnight: Mostly cloudy, with a low around 47. Light north northwest wind.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 66. North wind 3 to 5 mph.

    High: 66 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 46. Calm wind.

    Low: 46 °F

    Partly Cloudy

  • M.L.King Day

    M.L.King Day: Sunny, with a high near 65. Calm wind becoming north around 6 mph in the afternoon.

    High: 65 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44. Light northeast wind.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Patchy fog before 8am. Otherwise, mostly sunny, with a high near 66.

    High: 66 °F

    Patchy Fog
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 46.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 64.

    High: 64 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 47. Light north northwest wind.
Sunday
Mostly sunny, with a high near 66. North wind 3 to 5 mph.
Sunday Night
Partly cloudy, with a low around 46. Calm wind.
M.L.King Day
Sunny, with a high near 65. Calm wind becoming north around 6 mph in the afternoon.
Monday Night
Mostly clear, with a low around 44. Light northeast wind.
Tuesday
Patchy fog before 8am. Otherwise, mostly sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 46.
Wednesday
Partly sunny, with a high near 64.
Wednesday Night
Mostly cloudy, with a low around 48.
Thursday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 62.
Thursday Night
Patchy fog. Otherwise, partly cloudy, with a low around 47.
Friday
Patchy fog. Otherwise, mostly sunny, with a high near 61.
Friday Night
Patchy fog. Otherwise, partly cloudy, with a low around 46.
Saturday
Patchy fog. Otherwise, mostly sunny, with a high near 61.
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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:
12:26 am PST Jan 18, 2026
Forecast Valid:
1am PST Jan 18, 2026-6pm PST Jan 24, 2026
 
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Additional Resources

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National Digital Forecast Database

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Chance of Precipitation