Heat Continues Across the Central and Western U.S.; Tracking Hazardous Weather Across the Northern U.S.

Early-season record warmth will persist across portions of the western and central U.S. through mid week, with high temperatures approaching 90 degrees from Texas to the Ohio Valley. Rain and mountain snow are possible across the Pacific Northwest Wednesday, with Severe Thunderstorms and wintry weather expected across the Northeast Thursday and Friday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

Lat: 37.881699°NLon: 121.914173°WElev: 3904.0ft.

NA

68°F

20°C

Humidity 35%
Wind Speed ESE 1 MPH
Barometer NA
Dewpoint 40°F (4°C)
Visibility NA
Last update 24 Mar 01:55 PM PDT
Extended Forecast for

Clayton CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 78. West wind around 10 mph, with gusts as high as 18 mph.

    High: 78 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 55. Southwest wind around 10 mph, with gusts as high as 18 mph.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 74. West wind 9 to 14 mph, with gusts as high as 24 mph.

    High: 74 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48. Southwest wind 9 to 15 mph, with gusts as high as 28 mph.

    Low: 48 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 73. West southwest wind 6 to 11 mph becoming north in the morning. Winds could gust as high as 21 mph.

    High: 73 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 55.

    Low: 55 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 76.

    High: 76 °F

    Partly Sunny

  • Friday Night

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

    Low: 54 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 77.

    High: 77 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 78. West wind around 10 mph, with gusts as high as 18 mph.
Tonight
Mostly clear, with a low around 55. Southwest wind around 10 mph, with gusts as high as 18 mph.
Wednesday
Mostly sunny, with a high near 74. West wind 9 to 14 mph, with gusts as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 48. Southwest wind 9 to 15 mph, with gusts as high as 28 mph.
Thursday
Mostly sunny, with a high near 73. West southwest wind 6 to 11 mph becoming north in the morning. Winds could gust as high as 21 mph.
Thursday Night
Partly cloudy, with a low around 55.
Friday
Partly sunny, with a high near 76.
Friday Night
Partly cloudy, with a low around 54.
Saturday
Mostly sunny, with a high near 77.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
Mostly sunny, with a high near 77.
Sunday Night
Partly cloudy, with a low around 55.
Monday
A slight chance of rain. Partly sunny, with a high near 70.
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ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
1:25 pm PDT Mar 24, 2026
2pm PDT Mar 24, 2026-6pm PDT Mar 30, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database