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, San Jose International Airport (KSJC)

Lat: 37.35917°NLon: 121.92417°WElev: 59.0ft.

Clear

66°F

19°C

Humidity 68%
Wind Speed N 0 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 20 Mar 09:00 AM PDT
Extended Forecast for

San Jose International Airport CA

Heat Advisory March 20, 09:19am until March 20, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory March 20, 09:19am until March 20, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 89 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 58. Northwest wind around 6 mph becoming calm in the evening.

    Low: 58 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 81. Light west wind becoming northwest 5 to 10 mph in the afternoon.

    High: 81 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 50. Northwest wind 9 to 14 mph becoming light west northwest after midnight.

    Low: 50 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 80. Calm wind becoming northwest 5 to 9 mph in the afternoon.

    High: 80 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 50.

    Low: 50 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

  • Monday Night

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

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 89. Calm wind becoming northwest 5 to 8 mph in the afternoon.
Tonight
Mostly clear, with a low around 58. Northwest wind around 6 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 81. Light west wind becoming northwest 5 to 10 mph in the afternoon.
Saturday Night
Mostly clear, with a low around 50. Northwest wind 9 to 14 mph becoming light west northwest after midnight.
Sunday
Sunny, with a high near 80. Calm wind becoming northwest 5 to 9 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 50.
Monday
Sunny, with a high near 79.
Monday Night
Mostly clear, with a low around 53.
Tuesday
Sunny, with a high near 80.
Tuesday Night
Mostly clear, with a low around 52.
Wednesday
Sunny, with a high near 77.
Wednesday Night
Partly cloudy, with a low around 50.
Thursday
Sunny, with a high near 79.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
San Jose International Airport CA
 37.35°N 121.93°W (Elev. 66 ft)
Last Update:
2:22 am PDT Mar 20, 2026
Forecast Valid:
9am 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