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

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. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. 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

72°F

22°C

Humidity 28%
Wind Speed N 4 MPH
Barometer NA
Dewpoint 38°F (3°C)
Visibility NA
Last update 17 Mar 03:55 PM PDT
Extended Forecast for

2 Miles S Clayton CA

Heat Advisory March 17, 07:55pm until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 17, 07:55pm until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Tonight

    Low: 61 °F

    Clear

  • Wednesday

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

    High: 90 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 62. Northwest wind around 5 mph becoming light and variable  after midnight.

    Low: 62 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 90. Light and variable wind becoming north northeast around 6 mph in the afternoon.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 64. North wind around 6 mph becoming light and variable  after midnight.

    Low: 64 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 91.

    High: 91 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

Detailed Forecast

Tonight
Clear, with a low around 61. East northeast wind around 5 mph becoming calm after midnight.
Wednesday
Sunny, with a high near 90. Calm wind becoming northeast around 6 mph in the morning.
Wednesday Night
Clear, with a low around 62. Northwest wind around 5 mph becoming light and variable after midnight.
Thursday
Sunny, with a high near 90. Light and variable wind becoming north northeast around 6 mph in the afternoon.
Thursday Night
Clear, with a low around 64. North wind around 6 mph becoming light and variable after midnight.
Friday
Sunny, with a high near 91.
Friday Night
Mostly clear, with a low around 62.
Saturday
Mostly sunny, with a high near 85.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 80.
Sunday Night
Partly cloudy, with a low around 55.
Monday
Mostly sunny, with a high near 78.
Monday Night
Mostly cloudy, with a low around 54.
Tuesday
Mostly sunny, with a high near 74.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles S Clayton CA
 37.92°N 121.93°W (Elev. 600 ft)
1:49 pm PDT Mar 17, 2026
7pm PDT Mar 17, 2026-6pm PDT Mar 24, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database