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

Super 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 the Northern Mariana Islands. Severe thunderstorms and heavy rain are expected from the Southern Plains to the Great Lakes through Tuesday. Heavy snow is expected in the Pacific Northwest. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

42°F

6°C

Humidity 84%
Wind Speed W 7 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Wind Chill38°F (3°C)
Last update 13 Apr 10:20 PM PDT
Extended Forecast for

2 Miles SSE Clayton CA

  • Overnight

    Overnight: Mostly clear, with a low around 48. South southwest wind around 8 mph.

    Low: 48 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64. Southwest wind 7 to 11 mph, with gusts as high as 22 mph.

    High: 64 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 48. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 66. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.

    High: 66 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48. West southwest wind 11 to 16 mph, with gusts as high as 30 mph.

    Low: 48 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 67.

    High: 67 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 47.

    Low: 47 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 71.

    High: 71 °F

    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 48. South southwest wind around 8 mph.
Tuesday
Sunny, with a high near 64. Southwest wind 7 to 11 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 48. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.
Wednesday
Mostly sunny, with a high near 66. Southwest wind 9 to 14 mph, with gusts as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 48. West southwest wind 11 to 16 mph, with gusts as high as 30 mph.
Thursday
Sunny, with a high near 67.
Thursday Night
Clear, with a low around 47.
Friday
Sunny, with a high near 71.
Friday Night
Partly cloudy, with a low around 47.
Saturday
Mostly sunny, with a high near 73.
Saturday Night
Partly cloudy, with a low around 51.
Sunday
A slight chance of rain. Mostly sunny, with a high near 70.
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.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSE Clayton CA
 37.92°N 121.93°W (Elev. 600 ft)
1:43 am PDT Apr 14, 2026
3am PDT Apr 14, 2026-6pm PDT Apr 20, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database