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

Heavy Rainfall and Flooding Threats in the Midwest and Ohio Valley; Heat Continues in the Plains and Southeast

An active pattern will continue to bring heavy to excessive rainfall and flash flooding threats to the Midwest and Ohio Valley over the next couple of days. Dangerous heat continues across the central/southern Plains and Southeast U.S. into next week. There is potential for record-tying/breaking temperatures with many areas forecast to see their hottest temperatures so far this year. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

Mostly Cloudy

63°F

17°C

Humidity 75%
Wind Speed WSW 19 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 13 Aug 07:07 PM PDT
Extended Forecast for

San Mateo CA

  • Tonight

    Tonight: Increasing clouds, with a low around 58. West southwest wind 5 to 14 mph, with gusts as high as 22 mph.

    Low: 58 °F

    Increasing
    Clouds

  • Friday

    Friday: Cloudy through mid morning, then gradual clearing, with a high near 71. Southwest wind 5 to 11 mph, with gusts as high as 18 mph.

    High: 71 °F

    Gradual
    Clearing

  • Friday Night

    Friday Night: Increasing clouds, with a low around 58. West wind 6 to 11 mph becoming light west southwest after midnight. Winds could gust as high as 18 mph.

    Low: 58 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 72. Calm wind becoming west 5 to 9 mph in the afternoon.

    High: 72 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 57. West wind 5 to 11 mph.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 73.

    High: 73 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 58.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 72.

    High: 72 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 58.

    Low: 58 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 58. West southwest wind 5 to 14 mph, with gusts as high as 22 mph.
Friday
Cloudy through mid morning, then gradual clearing, with a high near 71. Southwest wind 5 to 11 mph, with gusts as high as 18 mph.
Friday Night
Increasing clouds, with a low around 58. West wind 6 to 11 mph becoming light west southwest after midnight. Winds could gust as high as 18 mph.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 72. Calm wind becoming west 5 to 9 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 57. West wind 5 to 11 mph.
Sunday
Partly sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 58.
Monday
Mostly cloudy, with a high near 72.
Monday Night
Mostly cloudy, with a low around 58.
Tuesday
Partly sunny, with a high near 73.
Tuesday Night
Partly cloudy, with a low around 58.
Wednesday
Partly sunny, with a high near 73.
Wednesday Night
Partly cloudy, with a low around 58.
Thursday
Mostly sunny, with a high near 74.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
San Mateo CA
 37.56°N 122.33°W (Elev. 108 ft)
Last Update:
1:26 pm PDT Aug 13, 2026
Forecast Valid:
7pm PDT Aug 13, 2026-6pm PDT Aug 20, 2026
 
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Additional Resources

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Chance of Precipitation