Severe Thunderstorms for the Center of the Nation; Fire Weather Concerns; Flooding Issues for the Great Lakes Region

A round of severe thunderstorms are forecast across areas of the Southern Plains, Mississippi Valley and Great Lakes this afternoon and tonight; The threat for flash flooding will also accompany these storms. The rainfall for the Great Lakes region could prolong the ongoing flooding. Where the rain is needed, the Southern High Plains, critical fire weather concerns through today. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

40°F

4°C

Humidity 31%
Wind Speed N 32 MPH
Barometer NA
Dewpoint 12°F (-11°C)
Visibility NA
Wind Chill28°F (-2°C)
Last update 17 Apr 04:50 AM PDT
Extended Forecast for

Clayton CA

  • Today

    Today: Sunny, with a high near 68. North wind 7 to 10 mph, with gusts as high as 25 mph.

    High: 68 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 49. South southwest wind 3 to 6 mph.

    Low: 49 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 72. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 72 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 53. West southwest wind around 6 mph.

    Low: 53 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 70. West southwest wind 6 to 11 mph, with gusts as high as 21 mph.

    High: 70 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 30 percent chance of rain after 11pm.  Mostly cloudy, with a low around 52. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °F

    Chance Rain

  • Monday

    Monday: Rain likely.  Mostly cloudy, with a high near 63. Chance of precipitation is 60%.

    High: 63 °F

    Rain Likely

  • Monday Night

    Monday Night: Rain likely, mainly before 11pm.  Mostly cloudy, with a low around 52.

    Low: 52 °F

    Rain Likely

  • Tuesday

    Tuesday: Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am.  Mostly cloudy, with a high near 59.

    High: 59 °F

    Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 68. North wind 7 to 10 mph, with gusts as high as 25 mph.
Tonight
Partly cloudy, with a low around 49. South southwest wind 3 to 6 mph.
Saturday
Mostly sunny, with a high near 72. Calm wind becoming north northeast around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 53. West southwest wind around 6 mph.
Sunday
Partly sunny, with a high near 70. West southwest wind 6 to 11 mph, with gusts as high as 21 mph.
Sunday Night
A 30 percent chance of rain after 11pm. Mostly cloudy, with a low around 52. New precipitation amounts of less than a tenth of an inch possible.
Monday
Rain likely. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Monday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 52.
Tuesday
Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 59.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 50.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 62.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 67.
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ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
2:27 am PDT Apr 17, 2026
6am PDT Apr 17, 2026-6pm PDT Apr 23, 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