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

Storm Impacting the Southwest U.S.

A slow moving weather disturbance will continue to bring periodic rain showers, a few isolated thunderstorms, and a localized flash flooding across the Southwest. The threat will expand into the Southern Plains Wednesday night. Moderate to heavy snow across the Sierra Nevada and southern Utah Ranges will continue into the overnight period. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

43°F

6°C

Humidity 77%
Wind Speed ESE 1 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Last update 19 Nov 01:35 AM PST
Extended Forecast for

4 Miles SSE Clayton CA

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 44. South wind around 6 mph.

    Low: 44 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 46. South wind 6 to 9 mph.

    High: 46 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Rain likely after 10pm. Cloudy, with a low around 42. South southwest wind 7 to 11 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 42 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely, mainly before 10am. Partly sunny, with a high near 46. West northwest wind 10 to 16 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 46 °F

    Rain Likely
    then Chance
    Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 43. North northeast wind 6 to 14 mph.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 49.

    High: 49 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 50.

    High: 50 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 44. South wind around 6 mph.
Wednesday
Partly sunny, with a high near 46. South wind 6 to 9 mph.
Wednesday Night
Rain likely after 10pm. Cloudy, with a low around 42. South southwest wind 7 to 11 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Rain likely, mainly before 10am. Partly sunny, with a high near 46. West northwest wind 10 to 16 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday Night
Partly cloudy, with a low around 43. North northeast wind 6 to 14 mph.
Friday
Sunny, with a high near 49.
Friday Night
Mostly clear, with a low around 44.
Saturday
Sunny, with a high near 50.
Saturday Night
Mostly clear, with a low around 44.
Sunday
Sunny, with a high near 50.
Sunday Night
Mostly clear, with a low around 44.
Monday
Mostly sunny, with a high near 51.
Monday Night
Partly cloudy, with a low around 46.
Tuesday
Mostly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
Last Update:
1:37 am PST Nov 19, 2025
Forecast Valid:
1am PST Nov 19, 2025-6pm PST Nov 25, 2025
 
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