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

Hazardous Weather Conditions

Current conditions at

Ontario International Airport (KONT)

Lat: 34.05316°NLon: 117.57685°WElev: 906.0ft.

Clear

82°F

28°C

Humidity 51%
Wind Speed W 4 MPH
Barometer 29.83 in (1010.16 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 03 Aug 10:20 AM PDT
Extended Forecast for

Ontario CA

Extreme Heat Warning August 3, 10:34am until August 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 3, 10:34am until August 3, 08:00pm

    NOW until 8:00pm Mon

    Extreme Heat Warning

  • Today

    High: 97 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 67. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 67 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 96. Light west wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 96 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 67. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 67 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 95. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 95 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 67.

    Low: 67 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

  • Thursday Night

    Thursday Night: Clear, with a low around 68.

    Low: 68 °F

    Clear

Detailed Forecast

Today
Sunny, with a high near 97. West wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 67. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 96. Light west wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Clear, with a low around 67. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Wednesday
Sunny, with a high near 95. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Clear, with a low around 67.
Thursday
Sunny, with a high near 96.
Thursday Night
Clear, with a low around 68.
Friday
Sunny, with a high near 97.
Friday Night
Clear, with a low around 69.
Saturday
Sunny, with a high near 97.
Saturday Night
Mostly clear, with a low around 68.
Sunday
Sunny, with a high near 95.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.03°N 117.61°W (Elev. 823 ft)
Last Update:
5:27 am PDT Aug 3, 2026
Forecast Valid:
10am PDT Aug 3, 2026-6pm PDT Aug 9, 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