Hazardous Spring Weather Shifts to the Eastern and Northwest U.S. Wednesday

Isolated to scattered severe thunderstorms are expected Wednesday from the ArkLaTex and Lower Mississippi Valley northeastward through the Ohio Valley and Mid-Atlantic. Thunderstorms may produce heavy to excessive rain that could pose a flooding threat from east Texas into Upstate New York. A moderate atmospheric river will bring heavy snow and high winds to the Northwest U.S. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

55°F

13°C

Humidity 25%
Wind Speed NW 5 MPH
Barometer NA
Dewpoint 21°F (-6°C)
Visibility NA
Last update 10 Mar 11:35 PM PDT
Extended Forecast for

4 Miles S Clayton CA

  • Overnight

    Overnight: Mostly clear, with a steady temperature around 48. North wind 7 to 9 mph.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 73. North wind 6 to 8 mph.

    High: 73 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 55. West wind 7 to 10 mph.

    Low: 55 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 79. West wind around 7 mph becoming north in the morning.

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 56. West southwest wind around 9 mph, with gusts as high as 18 mph.

    Low: 56 °F

    Mostly Clear

  • Friday

    Friday: Partly sunny, with a high near 78.

    High: 78 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a steady temperature around 48. North wind 7 to 9 mph.
Wednesday
Sunny, with a high near 73. North wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 55. West wind 7 to 10 mph.
Thursday
Sunny, with a high near 79. West wind around 7 mph becoming north in the morning.
Thursday Night
Mostly clear, with a low around 56. West southwest wind around 9 mph, with gusts as high as 18 mph.
Friday
Partly sunny, with a high near 78.
Friday Night
Mostly cloudy, with a low around 55.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
Mostly cloudy, with a low around 68.
Monday
Mostly sunny, with a high near 86.
Monday Night
Mostly clear, with a low around 70.
Tuesday
Sunny, with a high near 88.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
1:26 pm PDT Mar 10, 2026
12am PDT Mar 11, 2026-6pm PDT Mar 17, 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