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Hazardous Weather Conditions

Current conditions at

Ontario International Airport (KONT)

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

Clear

99°F

37°C

Humidity 23%
Wind Speed WSW 12 MPH
Barometer 29.81 in (1009.48 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index97°F (36°C)
Last update 02 Aug 03:00 PM PDT
Extended Forecast for

3 Miles SSE Rancho Cucamonga CA

Extreme Heat Warning August 2, 03:18pm until August 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning August 2, 03:18pm until August 3, 08:00pm

    NOW until 8:00pm Mon

    Extreme Heat Warning

  • Tonight

    Low: 70 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 98. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 98 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 68. Southwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 20 mph.

    Low: 68 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 98. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 98 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 68. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.

    Low: 68 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 97.

    High: 97 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 69.

    Low: 69 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 98.

    High: 98 °F

    Sunny

Detailed Forecast

Tonight
Clear, with a low around 70. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Monday
Sunny, with a high near 98. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.
Monday Night
Clear, with a low around 68. Southwest wind 5 to 10 mph becoming light northwest after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 98. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
Clear, with a low around 68. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Wednesday
Sunny, with a high near 97.
Wednesday Night
Clear, with a low around 69.
Thursday
Sunny, with a high near 98.
Thursday Night
Mostly clear, with a low around 70.
Friday
Sunny, with a high near 99.
Friday Night
Mostly clear, with a low around 71.
Saturday
Sunny, with a high near 98.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Sunny, with a high near 96.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSE Rancho Cucamonga CA
 34.09°N 117.53°W (Elev. 1106 ft)
Last Update:
2:16 pm PDT Aug 2, 2026
Forecast Valid:
3pm PDT Aug 2, 2026-6pm PDT Aug 9, 2026
 
Forecast Discussion
 
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Additional Resources

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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