Strong to Severe Thunderstorms Continue Tonight in the East; Early Heat Wave in the West

Scattered strong to severe storms with damaging winds and potentially a tornado or two are expected tonight from the coastal Carolinas into the Mid-Atlantic states. An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Read More >

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

69°F

21°C

Humidity 32%
Wind Speed NW 14 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 16 Mar 07:40 PM PDT
Extended Forecast for

2 Miles S Clayton CA

Heat Advisory until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 60 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. Calm wind becoming east northeast around 6 mph in the morning.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 62. North northwest wind around 5 mph becoming light and variable  after midnight.

    Low: 62 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 90. Calm wind becoming northeast around 6 mph in the afternoon.

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 62. North wind around 6 mph becoming west southwest in the evening.

    Low: 62 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 92.

    High: 92 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 60. Southwest wind around 6 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 88. Calm wind becoming east northeast around 6 mph in the morning.
Tuesday Night
Clear, with a low around 62. North northwest wind around 5 mph becoming light and variable after midnight.
Wednesday
Sunny, with a high near 90. Calm wind becoming northeast around 6 mph in the afternoon.
Wednesday Night
Clear, with a low around 62. North wind around 6 mph becoming west southwest in the evening.
Thursday
Sunny, with a high near 91.
Thursday Night
Clear, with a low around 64.
Friday
Sunny, with a high near 92.
Friday Night
Mostly clear, with a low around 63.
Saturday
Sunny, with a high near 86.
Saturday Night
Partly cloudy, with a low around 58.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 75.
Basemap Options
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Clayton CA
 37.92°N 121.93°W (Elev. 600 ft)
1:25 pm PDT Mar 16, 2026
9pm PDT Mar 16, 2026-6pm PDT Mar 23, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database