Severe Thunderstorms for mid-Mississippi and Ohio Valley; Record Warmth and Fire Weather Concerns

Severe thunderstorms are expected later this afternoon and evening across the mid-Mississippi and Ohio Valley's. Large hail, damaging winds and a few tornadoes are all possible. Meanwhile, record warmth across the southern tier of the country continues; This will enhance fire weather conditions for the Plains. The cold front will head south on Friday with cooler temperatures east of the Rockies. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

56°F

13°C

Humidity 38%
Wind Speed NW 13 MPH
Barometer NA
Dewpoint 31°F (-1°C)
Visibility NA
Last update 26 Mar 02:20 AM PDT
Extended Forecast for

Clayton CA

  • Today

    Today: Mostly sunny, with a high near 75. South wind 6 to 11 mph becoming north in the afternoon. Winds could gust as high as 24 mph.

    High: 75 °F

    Mostly Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 56. North northeast wind 5 to 7 mph becoming light and variable  after midnight. Winds could gust as high as 25 mph.

    Low: 56 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 76. Light and variable wind becoming north northeast around 6 mph in the afternoon.

    High: 76 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 52. West northwest wind 6 to 8 mph becoming southwest in the evening.

    Low: 52 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 77. Southwest wind 5 to 7 mph becoming northwest in the morning.

    High: 77 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 55.

    Low: 55 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 57.

    Low: 57 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 72.

    High: 72 °F

    Partly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 75. South wind 6 to 11 mph becoming north in the afternoon. Winds could gust as high as 24 mph.
Tonight
Mostly cloudy, with a low around 56. North northeast wind 5 to 7 mph becoming light and variable after midnight. Winds could gust as high as 25 mph.
Friday
Partly sunny, with a high near 76. Light and variable wind becoming north northeast around 6 mph in the afternoon.
Friday Night
Partly cloudy, with a low around 52. West northwest wind 6 to 8 mph becoming southwest in the evening.
Saturday
Sunny, with a high near 77. Southwest wind 5 to 7 mph becoming northwest in the morning.
Saturday Night
Mostly clear, with a low around 55.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 57.
Monday
Partly sunny, with a high near 72.
Monday Night
A chance of rain after 11pm. Mostly cloudy, with a low around 55.
Tuesday
Rain likely. Mostly cloudy, with a high near 61.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 52.
Wednesday
A chance of rain. Partly sunny, with a high near 62.
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ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
2:31 am PDT Mar 26, 2026
6am PDT Mar 26, 2026-6pm PDT Apr 1, 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