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

Heat Wave and Severe Thunderstorms this Independence Day

A prolonged, dangerous heat wave will persist through the Independence Day weekend across the Ohio Valley, Midwest, and Mid-Atlantic. Numerous temperature records are expected. Clusters of severe thunderstorms will move across parts of the Allegheny Plateau into Mid Atlantic this Independence Day, with potential for widespread damaging winds. Additional severe thunderstorms in the Great Plains. Read More >

Current conditions at

San Francisco, San Francisco International Airport (KSFO)

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

haze

61°F

16°C

Humidity 77%
Wind Speed WNW 25 MPH
Barometer 29.97 in (1014.9 mb)
Dewpoint 54°F (12°C)
Visibility 6.00 mi
Last update 04 Jul 06:00 PM PDT
Extended Forecast for

San Mateo CA

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. West wind 5 to 9 mph becoming light west southwest after midnight.

    Low: 56 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy through mid morning, then gradual clearing, with a high near 71. Light southwest wind becoming west southwest 6 to 11 mph in the morning.

    High: 71 °F

    Gradual
    Clearing

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 56. West southwest wind 5 to 10 mph.

    Low: 56 °F

    Partly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 69. West wind 5 to 11 mph.

    High: 69 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 55. West wind 7 to 11 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 68.

    High: 68 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly cloudy, with a low around 56. West wind 5 to 9 mph becoming light west southwest after midnight.
Sunday
Cloudy through mid morning, then gradual clearing, with a high near 71. Light southwest wind becoming west southwest 6 to 11 mph in the morning.
Sunday Night
Partly cloudy, with a low around 56. West southwest wind 5 to 10 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 69. West wind 5 to 11 mph.
Monday Night
Partly cloudy, with a low around 55. West wind 7 to 11 mph, with gusts as high as 18 mph.
Tuesday
Partly sunny, with a high near 68.
Tuesday Night
Partly cloudy, with a low around 54.
Wednesday
Mostly sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 56.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 55.
Friday
Mostly sunny, with a high near 74.
Friday Night
Partly cloudy, with a low around 55.
Saturday
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 122.3°W (Elev. 36 ft)
Last Update:
1:26 pm PDT Jul 4, 2026
Forecast Valid:
6pm PDT Jul 4, 2026-6pm PDT Jul 11, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation