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Hazardous Weather Conditions

Current conditions at

Ontario International Airport (KONT)

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

Clear

77°F

25°C

Humidity 40%
Wind Speed NE 4 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 04 Oct 02:53 AM PDT
Extended Forecast for

Ontario CA

Extreme Heat Warning October 4, 03:14am until October 8, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning October 4, 03:14am until October 8, 08:00pm

    NOW until 8:00pm Thu

    Extreme Heat Warning

  • Overnight

    Low: 75 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 102. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.

    High: 102 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 74. West wind around 5 mph becoming calm in the evening.

    Low: 74 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 102. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 102 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 73. West wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 102.

    High: 102 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 72.

    Low: 72 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 101.

    High: 101 °F

    Sunny

Detailed Forecast

Overnight
Clear, with a low around 75. Calm wind.
Sunday
Sunny, with a high near 102. Light and variable wind becoming southeast 5 to 10 mph in the afternoon.
Sunday Night
Clear, with a low around 74. West wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 102. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
Clear, with a low around 73. West wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 102.
Tuesday Night
Clear, with a low around 72.
Wednesday
Sunny, with a high near 101.
Wednesday Night
Clear, with a low around 72.
Thursday
Sunny, with a high near 100.
Thursday Night
Clear, with a low around 71.
Friday
Sunny, with a high near 97.
Friday Night
Mostly clear, with a low around 68.
Saturday
Mostly sunny, with a high near 86.
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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:
12:28 am PDT Oct 4, 2026
Forecast Valid:
3am PDT Oct 4, 2026-6pm PDT Oct 10, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation