National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Sinlaku Continues to Impact the Marianas; Severe Weather for the Central Plains and Northeast; Record Warmth for mid-Atlantic to Southeast

Sinlaku continues to affect the Marianas as it moves north through Friday. Meanwhile, severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley today and for the Central/Southern Plains on Friday. Considerable flooding impacts are ongoing in the Upper Great Lakes, and expected to continue through the weekend. Fire weather concerns persist in the Plains. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

48°F

9°C

Humidity 36%
Wind Speed N 10 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Wind Chill44°F (7°C)
Last update 16 Apr 03:10 PM PDT
Extended Forecast for

4 Miles SSE Clayton CA

  • Tonight

    Tonight: Clear, with a low around 45. North northwest wind 11 to 18 mph, with gusts as high as 37 mph.

    Low: 45 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 63. North wind 8 to 11 mph, with gusts as high as 25 mph.

    High: 63 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 49. West northwest wind 7 to 9 mph becoming southwest after midnight.

    Low: 49 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 68. Southwest wind around 5 mph becoming light and variable.

    High: 68 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 52. West southwest wind 6 to 9 mph.

    Low: 52 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 65.

    High: 65 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 40 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance Rain

  • Monday

    Monday: Rain likely, mainly after 11am. Mostly cloudy, with a high near 61.

    High: 61 °F

    Rain Likely

  • Monday Night

    Monday Night: A chance of rain. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Chance Rain

Detailed Forecast

Tonight
Clear, with a low around 45. North northwest wind 11 to 18 mph, with gusts as high as 37 mph.
Friday
Sunny, with a high near 63. North wind 8 to 11 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 49. West northwest wind 7 to 9 mph becoming southwest after midnight.
Saturday
Mostly sunny, with a high near 68. Southwest wind around 5 mph becoming light and variable.
Saturday Night
Mostly cloudy, with a low around 52. West southwest wind 6 to 9 mph.
Sunday
Partly sunny, with a high near 65.
Sunday Night
A 40 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 51.
Monday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 61.
Monday Night
A chance of rain. Mostly cloudy, with a low around 51.
Tuesday
Rain likely before 11am, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 56.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 50.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 49.
Thursday
Sunny, with a high near 64.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.9°N 121.9°W (Elev. 1814 ft)
Last Update:
1:26 pm PDT Apr 16, 2026
Forecast Valid:
3pm PDT Apr 16, 2026-6pm PDT Apr 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation