Areas of Excessive Rainfall and Severe Thunderstorms; Fire Weather Concerns in the Northern Plains and Four Corners Region

Widespread showers and thunderstorms may bring areas of flash flooding across much of the Southern Plains into the Gulf Coast region and the upper Ohio River Valley into the Mid-Atlantic. A large Pacific storm will bring widespread rain, gusty winds, and mountain snow to California and the Great Basin. Fire weather concerns expected in the Northern Plains and the Four Corners region. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

N/A

Humidity 28%
Wind Speed NW 9 MPH
Barometer NA
Dewpoint N/A
Visibility NA
Last update 17 May 05:05 PM PDT
Extended Forecast for

4 Miles SSE Clayton CA

  • Overnight

    Overnight: Partly cloudy, with a steady temperature around 46. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.

    Low: 46 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 58. South southwest wind 6 to 9 mph.

    High: 58 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a steady temperature around 51. Southwest wind 8 to 10 mph becoming south southeast after midnight. Winds could gust as high as 20 mph.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: A 30 percent chance of rain, mainly after 11am.  Partly sunny, with a high near 60. South southeast wind 5 to 8 mph becoming northwest in the morning.  New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Chance Rain

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 50. Southwest wind 10 to 14 mph, with gusts as high as 26 mph.

    Low: 50 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

  • Friday Night

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

    Low: 50 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

Detailed Forecast

Overnight
Partly cloudy, with a steady temperature around 46. Southwest wind 9 to 11 mph, with gusts as high as 20 mph.
Wednesday
Mostly sunny, with a high near 58. South southwest wind 6 to 9 mph.
Wednesday Night
Mostly cloudy, with a steady temperature around 51. Southwest wind 8 to 10 mph becoming south southeast after midnight. Winds could gust as high as 20 mph.
Thursday
A 30 percent chance of rain, mainly after 11am. Partly sunny, with a high near 60. South southeast wind 5 to 8 mph becoming northwest in the morning. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Partly cloudy, with a low around 50. Southwest wind 10 to 14 mph, with gusts as high as 26 mph.
Friday
Mostly sunny, with a high near 57.
Friday Night
Mostly clear, with a low around 50.
Saturday
Sunny, with a high near 63.
Saturday Night
Clear, with a low around 46.
Sunday
Sunny, with a high near 69.
Sunday Night
Clear, with a low around 52.
Monday
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 58.
Tuesday
Sunny, with a high near 74.
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
1:26 am PDT May 27, 2026
1am PDT May 27, 2026-6pm PDT Jun 2, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database