National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

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

71°F

22°C

Humidity 9%
Wind Speed NW 3 MPH
Barometer NA
Dewpoint 9°F (-13°C)
Visibility NA
Last update 19 Mar 02:45 AM PDT
Extended Forecast for

2 Miles S Clayton CA

Heat Advisory March 19, 04:28am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 19, 04:28am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 90 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 63. Northwest wind around 5 mph becoming light and variable after midnight.

    Low: 63 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 91. Calm wind becoming north northeast around 5 mph in the afternoon.

    High: 91 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62. West northwest wind 6 to 8 mph becoming southwest in the evening.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 85. West wind 7 to 9 mph, with gusts as high as 18 mph.

    High: 85 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 90. Light and variable wind becoming northeast around 6 mph in the morning.
Tonight
Clear, with a low around 63. Northwest wind around 5 mph becoming light and variable after midnight.
Friday
Sunny, with a high near 91. Calm wind becoming north northeast around 5 mph in the afternoon.
Friday Night
Mostly clear, with a low around 62. West northwest wind 6 to 8 mph becoming southwest in the evening.
Saturday
Mostly sunny, with a high near 85. West wind 7 to 9 mph, with gusts as high as 18 mph.
Saturday Night
Mostly clear, with a low around 56.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 53.
Monday
Sunny, with a high near 82.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Sunny, with a high near 82.
Tuesday Night
Mostly clear, with a low around 54.
Wednesday
Sunny, with a high near 76.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Clayton CA
 37.92°N 121.93°W (Elev. 600 ft)
Last Update:
2:33 am PDT Mar 19, 2026
Forecast Valid:
4am PDT Mar 19, 2026-6pm PDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation