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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. Read More >

Hazardous Weather Conditions

Current conditions at

San Jose / Reid / Hillv (KRHV)

Lat: 37.33333°NLon: 121.81667°WElev: 135.0ft.

Clear

72°F

22°C

Humidity 56%
Wind Speed N 0 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 19 Mar 09:57 PM PDT
Extended Forecast for

10 Miles NNE Mount Hamilton CA

Heat Advisory March 20, 05:48am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 20, 05:48am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 85 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 51. North northwest wind around 7 mph becoming south southwest after midnight.

    Low: 51 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 78. West northwest wind 7 to 10 mph, with gusts as high as 18 mph.

    High: 78 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 45. West southwest wind 11 to 14 mph, with gusts as high as 21 mph.

    Low: 45 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 76. North northwest wind around 11 mph.

    High: 76 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 85. North northeast wind around 6 mph becoming south in the morning.
Tonight
Mostly clear, with a low around 51. North northwest wind around 7 mph becoming south southwest after midnight.
Saturday
Mostly sunny, with a high near 78. West northwest wind 7 to 10 mph, with gusts as high as 18 mph.
Saturday Night
Mostly clear, with a low around 45. West southwest wind 11 to 14 mph, with gusts as high as 21 mph.
Sunday
Sunny, with a high near 76. North northwest wind around 11 mph.
Sunday Night
Mostly clear, with a low around 46.
Monday
Sunny, with a high near 74.
Monday Night
Mostly clear, with a low around 49.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 73.
Wednesday Night
Mostly clear, with a low around 45.
Thursday
Sunny, with a high near 71.
Basemap Options
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
10 Miles NNE Mount Hamilton CA
 37.48°N 121.56°W (Elev. 3707 ft)
Last Update:
2:22 am PDT Mar 20, 2026
Forecast Valid:
5am PDT Mar 20, 2026-6pm PDT Mar 26, 2026
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation