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

52°F

11°C

Humidity 76%
Wind Speed N 0 MPH
Barometer 30.35 in (1027.77 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 12 Jan 09:20 AM PST
Extended Forecast for

San Mateo CA

  • Today

    Today: Sunny, with a high near 59. North wind 5 to 7 mph.

    High: 59 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 43. East northeast wind around 5 mph.

    Low: 43 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 62. East northeast wind around 7 mph.

    High: 62 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 45. North northeast wind around 6 mph.

    Low: 45 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 62. North northeast wind 6 to 8 mph.

    High: 62 °F

    Sunny

  • Wednesday Night

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

    Low: 47 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 65.

    High: 65 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 59. North wind 5 to 7 mph.
Tonight
Mostly clear, with a low around 43. East northeast wind around 5 mph.
Tuesday
Sunny, with a high near 62. East northeast wind around 7 mph.
Tuesday Night
Mostly clear, with a low around 45. North northeast wind around 6 mph.
Wednesday
Sunny, with a high near 62. North northeast wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 47.
Thursday
Sunny, with a high near 64.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 48.
Saturday
Mostly sunny, with a high near 64.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
Mostly sunny, with a high near 63.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Mateo CA
 37.58°N 122.33°W (Elev. 33 ft)
Last Update:
12:26 am PST Jan 12, 2026
Forecast Valid:
9am PST Jan 12, 2026-6pm PST Jan 18, 2026
 
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Additional Resources

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Chance of Precipitation