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

Sinlaku Continues to Impact the Marianas; Severe Weather from the Central US to the Northeast; Late-Season Snow in the Northwest

Sinlaku continues to bring destructive winds, widespread heavy rain/flooding, and storm surge to the Marianas. Showers and severe thunderstorms are expected from the Northeast to the Mid-Mississippi Valley and to the Central/Southern Plains through Thursday. A front will produce late-season snowfall over the Cascades and Northern Rockies and coastal rain over the Northwest Coast through Thursday. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

55°F

13°C

Humidity 27%
Wind Speed WNW 2 MPH
Barometer NA
Dewpoint 22°F (-6°C)
Visibility NA
Last update 15 Apr 12:00 PM PDT
Extended Forecast for

Clayton CA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 64. West southwest wind 11 to 14 mph, with gusts as high as 24 mph.

    High: 64 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 45. West southwest wind 7 to 15 mph becoming northwest after midnight. Winds could gust as high as 28 mph.

    Low: 45 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 64. North wind 10 to 16 mph, with gusts as high as 30 mph.

    High: 64 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 48. North northwest wind 9 to 14 mph, with gusts as high as 31 mph.

    Low: 48 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 69. North wind 7 to 10 mph, with gusts as high as 23 mph.

    High: 69 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of rain, mainly after 11am. Partly sunny, with a high near 68.

    High: 68 °F

    Chance Rain

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 64. West southwest wind 11 to 14 mph, with gusts as high as 24 mph.
Tonight
Partly cloudy, with a low around 45. West southwest wind 7 to 15 mph becoming northwest after midnight. Winds could gust as high as 28 mph.
Thursday
Sunny, with a high near 64. North wind 10 to 16 mph, with gusts as high as 30 mph.
Thursday Night
Clear, with a low around 48. North northwest wind 9 to 14 mph, with gusts as high as 31 mph.
Friday
Sunny, with a high near 69. North wind 7 to 10 mph, with gusts as high as 23 mph.
Friday Night
Mostly clear, with a low around 48.
Saturday
Sunny, with a high near 72.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
A chance of rain, mainly after 11am. Partly sunny, with a high near 68.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 51.
Monday
A chance of rain. Partly sunny, with a high near 64.
Monday Night
A chance of rain. Mostly cloudy, with a low around 52.
Tuesday
A chance of rain. Partly sunny, with a high near 62.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Clayton CA
 37.91°N 121.96°W (Elev. 1299 ft)
Last Update:
11:26 am PDT Apr 15, 2026
Forecast Valid:
12pm PDT Apr 15, 2026-6pm PDT Apr 21, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation