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

Severe Weather in the Central U.S.; Critical Fire Weather in the Southern Plains

Severe thunderstorms are expected to form today from northern Oklahoma into southern Minnesota. Very large hail and tornadoes will be the initial threats this afternoon, then transition into a wind threat tonight. Gusty winds, warm temperatures, and very dry conditions will create a Critical Risk of fire weather across portions of the southern Plains today. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

48°F

9°C

Humidity 78%
Wind Speed NNW 2 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 23 Apr 10:25 AM PDT
Extended Forecast for

4 Miles SSE Clayton CA

  • Tonight

    Tonight: Partly cloudy, with a low around 47. South southwest wind around 11 mph, with gusts as high as 21 mph.

    Low: 47 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 55. South southwest wind 9 to 14 mph, with gusts as high as 24 mph.

    High: 55 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 44. West southwest wind around 15 mph, with gusts as high as 29 mph.

    Low: 44 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 52. Southwest wind 14 to 16 mph, with gusts as high as 29 mph.

    High: 52 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47. Southwest wind 14 to 17 mph, with gusts as high as 33 mph.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain. Mostly sunny, with a high near 53.

    High: 53 °F

    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 47. South southwest wind around 11 mph, with gusts as high as 21 mph.
Friday
Partly sunny, with a high near 55. South southwest wind 9 to 14 mph, with gusts as high as 24 mph.
Friday Night
Partly cloudy, with a low around 44. West southwest wind around 15 mph, with gusts as high as 29 mph.
Saturday
Partly sunny, with a high near 52. Southwest wind 14 to 16 mph, with gusts as high as 29 mph.
Saturday Night
Mostly cloudy, with a low around 47. Southwest wind 14 to 17 mph, with gusts as high as 33 mph.
Sunday
A 20 percent chance of rain. Mostly sunny, with a high near 53.
Sunday Night
Mostly clear, with a low around 45.
Monday
Sunny, with a high near 57.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Sunny, with a high near 62.
Tuesday Night
Partly cloudy, with a low around 49.
Wednesday
Sunny, with a high near 62.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
Last Update:
2:57 pm PDT Apr 23, 2026
Forecast Valid:
4pm PDT Apr 23, 2026-6pm PDT Apr 30, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation