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

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

4 Miles SSE Clayton CA

  • Tonight

    Tonight: Mostly clear, with a low around 54. West wind around 14 mph, with gusts as high as 25 mph.

    Low: 54 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 67. West wind 13 to 16 mph, with gusts as high as 29 mph.

    High: 67 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 47. West southwest wind 14 to 18 mph, with gusts as high as 34 mph.

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 65. West southwest wind 9 to 16 mph becoming north in the morning. Winds could gust as high as 28 mph.

    High: 65 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 54. North wind 8 to 14 mph becoming west in the evening. Winds could gust as high as 24 mph.

    Low: 54 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 68.

    High: 68 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 54. West wind around 14 mph, with gusts as high as 25 mph.
Wednesday
Mostly sunny, with a high near 67. West wind 13 to 16 mph, with gusts as high as 29 mph.
Wednesday Night
Partly cloudy, with a low around 47. West southwest wind 14 to 18 mph, with gusts as high as 34 mph.
Thursday
Mostly sunny, with a high near 65. West southwest wind 9 to 16 mph becoming north in the morning. Winds could gust as high as 28 mph.
Thursday Night
Partly cloudy, with a low around 54. North wind 8 to 14 mph becoming west in the evening. Winds could gust as high as 24 mph.
Friday
Partly sunny, with a high near 68.
Friday Night
Partly cloudy, with a low around 52.
Saturday
Sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
Mostly sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 54.
Monday
A slight chance of rain. Partly sunny, with a high near 65.
Monday Night
A chance of rain. Mostly cloudy, with a low around 52.
Tuesday
A chance of rain. Partly sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
Last Update:
1:25 pm PDT Mar 24, 2026
Forecast Valid:
3pm PDT Mar 24, 2026-6pm PDT Mar 31, 2026
 
Forecast Discussion
 
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