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

45°F

7°C

Humidity 37%
Wind Speed NNW 17 MPH
Barometer NA
Dewpoint 20°F (-7°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 16 Apr 01:00 PM PDT
Extended Forecast for

4 Miles SSE Clayton CA

  • This Afternoon

    This Afternoon: Sunny, with a high near 55. Breezy, with a north wind 18 to 22 mph, with gusts as high as 37 mph.

    High: 55 °F

    Sunny and
    Breezy

  • Tonight

    Tonight: Clear, with a low around 43. North wind 13 to 21 mph, with gusts as high as 46 mph.

    Low: 43 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 59. North wind 9 to 15 mph, with gusts as high as 33 mph.

    High: 59 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47. West northwest wind around 9 mph becoming southwest in the evening.

    Low: 47 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 65. Southwest wind around 6 mph becoming north northeast in the morning.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 50 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 61.

    High: 61 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of rain, mainly after 11pm. Mostly cloudy, with a low around 50.

    Low: 50 °F

    Chance Rain

  • Monday

    Monday: Rain likely, mainly after 11am. Mostly cloudy, with a high near 57.

    High: 57 °F

    Rain Likely

Detailed Forecast

This Afternoon
Sunny, with a high near 55. Breezy, with a north wind 18 to 22 mph, with gusts as high as 37 mph.
Tonight
Clear, with a low around 43. North wind 13 to 21 mph, with gusts as high as 46 mph.
Friday
Sunny, with a high near 59. North wind 9 to 15 mph, with gusts as high as 33 mph.
Friday Night
Partly cloudy, with a low around 47. West northwest wind around 9 mph becoming southwest in the evening.
Saturday
Mostly sunny, with a high near 65. Southwest wind around 6 mph becoming north northeast in the morning.
Saturday Night
Mostly cloudy, with a low around 50.
Sunday
Partly sunny, with a high near 61.
Sunday Night
A chance of rain, mainly after 11pm. Mostly cloudy, with a low around 50.
Monday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 57.
Monday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 50.
Tuesday
Rain likely and possibly a thunderstorm. Mostly cloudy, with a high near 54.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 49.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 56.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
Last Update:
1:26 pm PDT Apr 16, 2026
Forecast Valid:
1pm PDT Apr 16, 2026-6pm PDT Apr 22, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation