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

Typhoon Sinlaku to Impact the Marianas and Guam; Severe Weather from the Southern Plains to the Great Lakes

Typhoon Sinlaku will bring destructive winds, widespread heavy rain/flooding, thunderstorms, and coastal impacts to the Marianas Islands into Wednesday. Typhoon conditions are likely over CNMI and tropical storm conditions over Guam. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes today. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

43°F

6°C

Humidity 92%
Wind Speed SSW 2 MPH
Barometer NA
Dewpoint 41°F (5°C)
Visibility NA
Last update 14 Apr 10:40 AM PDT
Extended Forecast for

3 Miles S Clayton CA

  • This Afternoon

    This Afternoon: Sunny, with a steady temperature around 55. West southwest wind 10 to 14 mph, with gusts as high as 23 mph.

    High: 55 °F

    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 45. Southwest wind 10 to 14 mph, with gusts as high as 25 mph.

    Low: 45 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Mostly cloudy, then gradually becoming sunny, with a high near 58. West southwest wind 11 to 15 mph, with gusts as high as 25 mph.

    High: 58 °F

    Decreasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 44. West southwest wind 14 to 17 mph, with gusts as high as 34 mph.

    Low: 44 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 60. West wind 10 to 20 mph becoming north in the morning. Winds could gust as high as 37 mph.

    High: 60 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 47.

    Low: 47 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

Detailed Forecast

This Afternoon
Sunny, with a steady temperature around 55. West southwest wind 10 to 14 mph, with gusts as high as 23 mph.
Tonight
Increasing clouds, with a low around 45. Southwest wind 10 to 14 mph, with gusts as high as 25 mph.
Wednesday
Mostly cloudy, then gradually becoming sunny, with a high near 58. West southwest wind 11 to 15 mph, with gusts as high as 25 mph.
Wednesday Night
Mostly clear, with a low around 44. West southwest wind 14 to 17 mph, with gusts as high as 34 mph.
Thursday
Sunny, with a high near 60. West wind 10 to 20 mph becoming north in the morning. Winds could gust as high as 37 mph.
Thursday Night
Clear, with a low around 47.
Friday
Sunny, with a high near 64.
Friday Night
Mostly clear, with a low around 45.
Saturday
Sunny, with a high near 68.
Saturday Night
Partly cloudy, with a low around 49.
Sunday
A chance of rain. Partly sunny, with a high near 63.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 50.
Monday
A chance of rain. Partly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Clayton CA
 37.9°N 121.92°W (Elev. 1900 ft)
Last Update:
2:16 pm PDT Apr 14, 2026
Forecast Valid:
2pm PDT Apr 14, 2026-6pm PDT Apr 20, 2026
 
Forecast Discussion
 
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Additional Resources

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