Severe Thunderstorms and Heavy Rainfall in the Ohio Valley and Great Lakes; Winter Weather in the Northern Tier

A slow moving front extending from the Great Lakes region into the Plains will bring snow, wintry mix, and ice accumulation north of the front from the Upper Midwest into New England, and severe weather and heavy rain south of the front. Scattered severe thunderstorms with damaging gusts, severe hail, and heavy rain are expected across parts of the Great Lakes/Midwest through tonight. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

45°F

7°C

Humidity 99%
Wind Speed SSW 10 MPH
Barometer NA
Dewpoint 45°F (7°C)
Visibility NA
Wind Chill40°F (4°C)
Last update 31 Mar 11:30 PM PDT
Extended Forecast for

4 Miles S Clayton CA

  • Overnight

    Overnight: A 20 percent chance of rain.  Mostly cloudy, with a low around 48. Southwest wind around 14 mph, with gusts as high as 24 mph.

    Low: 48 °F

    Slight Chance
    Rain

  • Wednesday

    Wednesday: Rain likely, mainly before 2pm.  Mostly cloudy, with a temperature falling to around 47 by 5pm. Breezy, with a southwest wind 14 to 24 mph, with gusts as high as 37 mph.  Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 51 °F

    Rain Likely
    and Breezy

  • Wednesday Night

    Wednesday Night: Rain, mainly before 1am.  Low around 42. Breezy, with a southwest wind 17 to 23 mph, with gusts as high as 39 mph.  Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 42 °F

    Rain and
    Breezy

  • Thursday

    Thursday: Sunny, with a high near 54. North northwest wind 14 to 17 mph, with gusts as high as 32 mph.

    High: 54 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 47. North northwest wind 11 to 16 mph, with gusts as high as 33 mph.

    Low: 47 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Friday Night

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

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Overnight
A 20 percent chance of rain. Mostly cloudy, with a low around 48. Southwest wind around 14 mph, with gusts as high as 24 mph.
Wednesday
Rain likely, mainly before 2pm. Mostly cloudy, with a temperature falling to around 47 by 5pm. Breezy, with a southwest wind 14 to 24 mph, with gusts as high as 37 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Wednesday Night
Rain, mainly before 1am. Low around 42. Breezy, with a southwest wind 17 to 23 mph, with gusts as high as 39 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Sunny, with a high near 54. North northwest wind 14 to 17 mph, with gusts as high as 32 mph.
Thursday Night
Clear, with a low around 47. North northwest wind 11 to 16 mph, with gusts as high as 33 mph.
Friday
Sunny, with a high near 63.
Friday Night
Mostly clear, with a low around 50.
Saturday
Sunny, with a high near 68.
Saturday Night
Mostly clear, with a low around 54.
Sunday
Sunny, with a high near 71.
Sunday Night
Partly cloudy, with a low around 53.
Monday
Sunny, with a high near 66.
Monday Night
Mostly clear, with a low around 52.
Tuesday
Sunny, with a high near 63.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles S Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
11:26 pm PDT Mar 31, 2026
12am PDT Apr 1, 2026-6pm PDT Apr 7, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database