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

Widespread Rain from Texas to the Central Appalachians; Heavy to Excessive Rainfall in Southern California and the Southwest

Scattered thunderstorms and widespread showers are expected from the Texas coast to the central Appalachians today. Heavy to excessive rainfall will continue in southern California into the Desert Southwest through Saturday. Heavy rain will pose a risk of flash flooding, especially across burn scar and urbanized regions. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

42°F

6°C

Humidity 73%
Wind Speed N 20 MPH
Barometer NA
Dewpoint 34°F (1°C)
Visibility NA
Wind Chill33°F (1°C)
Last update 21 Nov 10:25 AM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • Today

    Today: Sunny, with a high near 49. North wind around 6 mph.

    High: 49 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 44. Light west northwest wind.

    Low: 44 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 50. North northeast wind 3 to 5 mph.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 43. Light south wind.

    Low: 43 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 50. Light and variable wind.

    High: 50 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 42.

    Low: 42 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 49. North wind around 6 mph.
Tonight
Clear, with a low around 44. Light west northwest wind.
Saturday
Sunny, with a high near 50. North northeast wind 3 to 5 mph.
Saturday Night
Mostly clear, with a low around 43. Light south wind.
Sunday
Mostly sunny, with a high near 50. Light and variable wind.
Sunday Night
Partly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 49.
Monday Night
Mostly clear, with a low around 42.
Tuesday
Mostly sunny, with a high near 49.
Tuesday Night
Partly cloudy, with a low around 42.
Wednesday
Mostly sunny, with a high near 49.
Wednesday Night
Partly cloudy, with a low around 43.
Thanksgiving Day
Mostly sunny, with a high near 51.
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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:
6:13 am PST Nov 21, 2025
Forecast Valid:
10am PST Nov 21, 2025-6pm PST Nov 27, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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