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

3 Miles S Clayton CA

  • Overnight

    Overnight: Mostly clear, with a low around 46. Northwest wind around 8 mph becoming north northeast.

    Low: 46 °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 54. West southwest wind around 8 mph.

    Low: 54 °F

    Mostly Clear

  • Thursday

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

    High: 79 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54. West southwest wind around 9 mph.

    Low: 54 °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 54.

    Low: 54 °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 60.

    Low: 60 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 46. Northwest wind around 8 mph becoming north northeast.
Wednesday
Sunny, with a high near 73. North wind 6 to 8 mph.
Wednesday Night
Mostly clear, with a low around 54. West southwest wind around 8 mph.
Thursday
Sunny, with a high near 79. West southwest wind around 7 mph becoming north in the morning.
Thursday Night
Mostly clear, with a low around 54. West southwest wind around 9 mph.
Friday
Partly sunny, with a high near 78.
Friday Night
Mostly cloudy, with a low around 54.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 60.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
Mostly cloudy, with a low around 64.
Monday
Mostly sunny, with a high near 86.
Monday Night
Mostly clear, with a low around 66.
Tuesday
Sunny, with a high near 87.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Clayton CA
 37.9°N 121.92°W (Elev. 1900 ft)
1:26 am PDT Mar 11, 2026
1am PDT Mar 11, 2026-6pm PDT Mar 17, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database