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

Rapid Warm-Up Forecast Across Much of the Lower 48 Today and Tuesday

Most of the U.S. starts the week calm and unseasonably warm. The Heartland will be warmest, with highs 25–30° above average. Only the Gulf Coast stays chilly. Rain today is limited to western Washington while lake effect snow continues east of Lake Ontario. Cooler air returns after Tuesday, bringing a wintry mix to the Midwest and Northeast by Wednesday. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Clear

48°F

9°C

Humidity 93%
Wind Speed NNE 6 MPH
Barometer 30.3 in (1026.08 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 12 Jan 05:00 AM PST
Extended Forecast for

Foster City CA

  • Today

    Today: Sunny, with a high near 61. North northwest wind 3 to 7 mph.

    High: 61 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 42. East wind around 5 mph.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64. East northeast wind 5 to 7 mph.

    High: 64 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 44. North northeast wind around 5 mph.

    Low: 44 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 63. North wind 5 to 7 mph.

    High: 63 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 47.

    Low: 47 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 61. North northwest wind 3 to 7 mph.
Tonight
Mostly clear, with a low around 42. East wind around 5 mph.
Tuesday
Sunny, with a high near 64. East northeast wind 5 to 7 mph.
Tuesday Night
Mostly clear, with a low around 44. North northeast wind around 5 mph.
Wednesday
Sunny, with a high near 63. North wind 5 to 7 mph.
Wednesday Night
Mostly clear, with a low around 46.
Thursday
Sunny, with a high near 66.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 66.
Friday Night
Mostly clear, with a low around 47.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
Mostly sunny, with a high near 65.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Foster City CA
 37.57°N 122.27°W (Elev. 3 ft)
Last Update:
12:26 am PST Jan 12, 2026
Forecast Valid:
5am PST Jan 12, 2026-6pm PST Jan 18, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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National Digital Forecast Database Weather Element Forecast

Chance of Precipitation