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

Heavy Rain and Mountain Snow Lingers in California; Winter Storm Impacting the Great Lakes and Northeast U.S.

An atmospheric river will wind down through today across California with lingering heavy rainfall, heavy mountain snow, and gusty winds. A wintry mix of freezing rain, sleet, and snow will cause hazardous travel conditions for the Great Lakes into the northern Mid-Atlantic and southern New England today through Saturday morning. Areas of tree damage and power outages are possible. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Mostly Cloudy

51°F

11°C

Humidity 85%
Wind Speed WNW 10 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 27 Dec 01:56 AM PST
Extended Forecast for

Foster City CA

  • Overnight

    Overnight: A 30 percent chance of rain. Partly cloudy, with a low around 47. West northwest wind around 7 mph.

    Low: 47 °F

    Chance Rain

  • Saturday

    Saturday: Mostly sunny, with a high near 55. North wind 6 to 8 mph.

    High: 55 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Increasing clouds, with a low around 41. Light northeast wind.

    Low: 41 °F

    Increasing
    Clouds

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 55. North northeast wind 3 to 6 mph.

    High: 55 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 40. Northeast wind around 6 mph.

    Low: 40 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 58.

    High: 58 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Tuesday Night

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

    Low: 42 °F

    Mostly Clear

Detailed Forecast

Overnight
A 30 percent chance of rain. Partly cloudy, with a low around 47. West northwest wind around 7 mph.
Saturday
Mostly sunny, with a high near 55. North wind 6 to 8 mph.
Saturday Night
Increasing clouds, with a low around 41. Light northeast wind.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 55. North northeast wind 3 to 6 mph.
Sunday Night
Mostly clear, with a low around 40. Northeast wind around 6 mph.
Monday
Sunny, with a high near 58.
Monday Night
Mostly clear, with a low around 40.
Tuesday
Sunny, with a high near 59.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
A slight chance of rain after 4pm. Mostly sunny, with a high near 59.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 45.
New Year's Day
A chance of rain. Mostly cloudy, with a high near 58.
Thursday Night
Rain likely. Mostly cloudy, with a low around 47.
Friday
Rain likely. Mostly cloudy, with a high near 58.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Foster City CA
 37.54°N 122.29°W (Elev. 151 ft)
Last Update:
12:27 am PST Dec 27, 2025
Forecast Valid:
2am PST Dec 27, 2025-6pm PST Jan 2, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation