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

Critical Fire Weather in the Plains; Unseasonably Warm in the Southwest and Southern U.S.

Unseasonably warm temperatures continue through the weekend across the Southwest and southern U.S., with more than 100 record or near record maximum temperatures forecast through the rest of the week and over the weekend. Elevated to critical fire weather conditions will persist across the Plains and Southeast U.S. this weekend. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

60°F

16°C

Humidity 35%
Wind Speed N 15 MPH
Barometer NA
Dewpoint 32°F (0°C)
Visibility NA
Last update 29 Mar 03:10 AM PDT
Extended Forecast for

Clayton CA

  • Today

    Today: Sunny, with a high near 82. Calm wind becoming northwest 5 to 8 mph in the afternoon.

    High: 82 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 58. West wind 6 to 9 mph becoming south southwest after midnight.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 74. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 74 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 56. West southwest wind around 10 mph, with gusts as high as 18 mph.

    Low: 56 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 30 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 66. West southwest wind around 10 mph, with gusts as high as 18 mph.

    High: 66 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 52. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °F

    Chance Rain

  • Wednesday

    Wednesday: A 40 percent chance of rain. Partly sunny, with a high near 65.

    High: 65 °F

    Chance Rain

  • Wednesday Night

    Wednesday Night: A chance of rain. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance Rain

  • Thursday

    Thursday: A slight chance of rain before 11am. Sunny, with a high near 63.

    High: 63 °F

    Slight Chance
    Rain then
    Sunny

Detailed Forecast

Today
Sunny, with a high near 82. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Tonight
Partly cloudy, with a low around 58. West wind 6 to 9 mph becoming south southwest after midnight.
Monday
Partly sunny, with a high near 74. West southwest wind 6 to 10 mph, with gusts as high as 18 mph.
Monday Night
Mostly cloudy, with a low around 56. West southwest wind around 10 mph, with gusts as high as 18 mph.
Tuesday
A 30 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 66. West southwest wind around 10 mph, with gusts as high as 18 mph.
Tuesday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 52. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A 40 percent chance of rain. Partly sunny, with a high near 65.
Wednesday Night
A chance of rain. Mostly cloudy, with a low around 50.
Thursday
A slight chance of rain before 11am. Sunny, with a high near 63.
Thursday Night
Mostly clear, with a low around 47.
Friday
Sunny, with a high near 71.
Friday Night
Mostly clear, with a low around 50.
Saturday
Sunny, with a high near 75.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
Last Update:
8:46 am PDT Mar 29, 2026
Forecast Valid:
8am PDT Mar 29, 2026-6pm PDT Apr 4, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation