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

84°F

29°C

Humidity 48%
Wind Speed S 4 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 26 Aug 10:20 PM PDT
Extended Forecast for

Ontario International Arpt CA

Extreme Heat Warning August 26, 10:34pm until August 28, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 26, 10:34pm until August 28, 08:00pm

    NOW until 8:00pm Fri

    Extreme Heat Warning

  • Tonight

    Low: 75 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 104. Light southwest wind becoming west 5 to 10 mph in the afternoon.

    High: 104 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 75. West wind 5 to 10 mph becoming light southwest in the evening.

    Low: 75 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 102. Light west wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 102 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 73. Southwest wind 5 to 10 mph becoming light west in the evening.

    Low: 73 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 100.

    High: 100 °F

    Sunny

  • Saturday Night

    Saturday Night: Clear, with a low around 69.

    Low: 69 °F

    Clear

  • Sunday

    Sunday: Sunny, with a high near 94.

    High: 94 °F

    Sunny

Detailed Forecast

Tonight
Partly cloudy, with a low around 75. Calm wind.
Thursday
Mostly cloudy, with a high near 104. Light southwest wind becoming west 5 to 10 mph in the afternoon.
Thursday Night
Mostly cloudy, with a low around 75. West wind 5 to 10 mph becoming light southwest in the evening.
Friday
Mostly sunny, with a high near 102. Light west wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 73. Southwest wind 5 to 10 mph becoming light west in the evening.
Saturday
Sunny, with a high near 100.
Saturday Night
Clear, with a low around 69.
Sunday
Sunny, with a high near 94.
Sunday Night
Mostly clear, with a low around 65.
Monday
Sunny, with a high near 90.
Monday Night
A slight chance of showers. Mostly clear, with a low around 64.
Tuesday
A slight chance of showers. Mostly sunny, with a high near 90.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 66.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario International Arpt CA
 34.08°N 117.59°W (Elev. 1037 ft)
Last Update:
11:36 am PDT Aug 26, 2026
Forecast Valid:
10pm PDT Aug 26, 2026-6pm PDT Sep 2, 2026
 
Forecast Discussion
 
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Additional Resources

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