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 SSE Clayton CA

  • Overnight

    Overnight: Mostly clear, with a low around 47. Northwest wind around 7 mph.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 72. North northwest wind around 7 mph.

    High: 72 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 52. West wind around 7 mph.

    Low: 52 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 77. West southwest wind around 6 mph becoming north in the morning.

    High: 77 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 51. West southwest wind around 8 mph.

    Low: 51 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 47. Northwest wind around 7 mph.
Wednesday
Sunny, with a high near 72. North northwest wind around 7 mph.
Wednesday Night
Mostly clear, with a low around 52. West wind around 7 mph.
Thursday
Sunny, with a high near 77. West southwest wind around 6 mph becoming north in the morning.
Thursday Night
Partly cloudy, with a low around 51. West southwest wind around 8 mph.
Friday
Mostly sunny, with a high near 76.
Friday Night
Mostly cloudy, with a low around 50.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 53.
Sunday
Mostly sunny, with a high near 82.
Sunday Night
Mostly cloudy, with a low around 56.
Monday
Mostly sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 57.
Tuesday
Sunny, with a high near 86.
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Clayton CA
 37.9°N 121.9°W (Elev. 1814 ft)
2:53 am PDT Mar 11, 2026
3am 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