Hawaii and Guam Concerns; Severe Weather for the Plains; Heavy Snow for Sierra-Nevada

Heavy rainfall capable of causing flash flooding will continue to impact Hawaii through Monday. Severe thunderstorms and heavy rain are possible in parts of Texas and the southern Plains and the Upper Great Lakes. Heavy mountain snow continues in California's Sierra Nevada and rain with gusty winds to lower elevations. Super Typhoon Sinlaku will impact the Marianas through midweek. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

37°F

3°C

Humidity 100%
Wind Speed SSW 13 MPH
Barometer NA
Dewpoint 37°F (3°C)
Visibility NA
Wind Chill29°F (-2°C)
Last update 12 Apr 01:30 PM PDT
Extended Forecast for

4 Miles SSE Clayton CA

  • Tonight

    Tonight: A slight chance of rain before 3am, then a slight chance of rain after 4am.  Mostly cloudy, with a low around 42. West wind 6 to 14 mph, with gusts as high as 25 mph.  Chance of precipitation is 20%.

    Low: 42 °F

    Slight Chance
    Rain

  • Monday

    Monday: Sunny, with a high near 51. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 44. West wind 11 to 13 mph, with gusts as high as 22 mph.

    Low: 44 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 54. Southwest wind 10 to 13 mph, with gusts as high as 22 mph.

    High: 54 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47. Southwest wind 13 to 15 mph, with gusts as high as 26 mph.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Wednesday Night

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

    Low: 47 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 46.

    Low: 46 °F

    Clear

Detailed Forecast

Tonight
A slight chance of rain before 3am, then a slight chance of rain after 4am. Mostly cloudy, with a low around 42. West wind 6 to 14 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Monday
Sunny, with a high near 51. Northwest wind 6 to 11 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 44. West wind 11 to 13 mph, with gusts as high as 22 mph.
Tuesday
Sunny, with a high near 54. Southwest wind 10 to 13 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 47. Southwest wind 13 to 15 mph, with gusts as high as 26 mph.
Wednesday
Mostly sunny, with a high near 56.
Wednesday Night
Partly cloudy, with a low around 47.
Thursday
Sunny, with a high near 56.
Thursday Night
Clear, with a low around 46.
Friday
Sunny, with a high near 62.
Friday Night
Mostly clear, with a low around 46.
Saturday
Sunny, with a high near 65.
Saturday Night
Partly cloudy, with a low around 49.
Sunday
Mostly sunny, with a high near 64.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SSE Clayton CA
 37.87°N 121.92°W (Elev. 2818 ft)
6:36 pm PDT Apr 12, 2026
8pm PDT Apr 12, 2026-6pm PDT Apr 19, 2026
 
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Additional Resources

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Hourly Weather Forecast

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