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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

38°F

3°C

Humidity 100%
Wind Speed WSW 8 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Wind Chill32°F (0°C)
Last update 13 Apr 01:10 AM PDT
Extended Forecast for

3 Miles S Clayton CA

  • Overnight

    Overnight: A 20 percent chance of rain after 4am. Partly cloudy, with a low around 44. West southwest wind around 6 mph.

    Low: 44 °F

    Slight Chance
    Rain

  • Monday

    Monday: Sunny, with a high near 56. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.

    High: 56 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 45. West southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 58. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.

    High: 58 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 47. Southwest wind 11 to 14 mph, with gusts as high as 25 mph.

    Low: 47 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 47.

    Low: 47 °F

    Clear

Detailed Forecast

Overnight
A 20 percent chance of rain after 4am. Partly cloudy, with a low around 44. West southwest wind around 6 mph.
Monday
Sunny, with a high near 56. Northwest wind 6 to 10 mph, with gusts as high as 18 mph.
Monday Night
Mostly clear, with a low around 45. West southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Sunny, with a high near 58. Southwest wind 9 to 11 mph, with gusts as high as 22 mph.
Tuesday Night
Mostly clear, with a low around 47. Southwest wind 11 to 14 mph, with gusts as high as 25 mph.
Wednesday
Mostly sunny, with a high near 59.
Wednesday Night
Partly cloudy, with a low around 48.
Thursday
Sunny, with a high near 60.
Thursday Night
Clear, with a low around 47.
Friday
Sunny, with a high near 65.
Friday Night
Mostly clear, with a low around 48.
Saturday
Mostly sunny, with a high near 67.
Saturday Night
Partly cloudy, with a low around 50.
Sunday
A slight chance of rain. Mostly sunny, with a high near 63.
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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:
1:26 am PDT Apr 13, 2026
Forecast Valid:
3am PDT Apr 13, 2026-6pm PDT Apr 19, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation