Critical Fire Weather in the High Plains; Heat Continues in the West

Critical fire weather conditions will persist in the central High Plains through Friday as gusty winds and dry conditions continue. The heat wave across the West and Southwest will continue to intensify through the week, with daily and monthly record highs expected to be broken. Read More >

Hazardous Weather Conditions

Current conditions at

SJSU - Mount Diablo Summit Museum Rooftop (SJS02)

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

NA

75°F

24°C

Humidity 43%
Wind Speed SSW 4 MPH
Barometer NA
Dewpoint 51°F (11°C)
Visibility NA
Last update 18 Mar 04:10 PM PDT
Extended Forecast for

4 Miles SSE Clayton CA

Heat Advisory March 19, 02:07am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 19, 02:07am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Overnight

    Low: 69 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 85. North wind around 7 mph.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 71. North northwest wind around 7 mph.

    Low: 71 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 86. North wind 5 to 7 mph.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 69. West northwest wind 8 to 11 mph becoming southwest in the evening. Winds could gust as high as 21 mph.

    Low: 69 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

Overnight
Clear, with a low around 69. Northwest wind around 7 mph.
Thursday
Sunny, with a high near 85. North wind around 7 mph.
Thursday Night
Clear, with a low around 71. North northwest wind around 7 mph.
Friday
Sunny, with a high near 86. North wind 5 to 7 mph.
Friday Night
Mostly clear, with a low around 69. West northwest wind 8 to 11 mph becoming southwest in the evening. Winds could gust as high as 21 mph.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 61.
Sunday
Sunny, with a high near 77.
Sunday Night
Mostly clear, with a low around 52.
Monday
Sunny, with a high near 73.
Monday Night
Mostly clear, with a low around 54.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 66.
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)
1:26 am PDT Mar 19, 2026
2am PDT Mar 19, 2026-6pm PDT Mar 25, 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