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

79°F

26°C

Humidity 57%
Wind Speed S 4 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 63°F (17°C)
Visibility 9.00 mi
Heat Index80°F (27°C)
Last update 28 Jul 09:20 AM PDT
Extended Forecast for

3 Miles SSE Rancho Cucamonga CA

Extreme Heat Warning July 30, 10:00am until August 2, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning

  • Today

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

    High: 96 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 68. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 68 °F

    Clear

  • Wednesday

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

    High: 96 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 66. Southwest wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph.

    Low: 66 °F

    Clear

  • Thursday

    Thursday: Sunny, with a high near 98. Light west wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 98 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 101.

    High: 101 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 72.

    Low: 72 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 104.

    High: 104 °F

    Sunny

Detailed Forecast

Today
Sunny, with a high near 96. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Clear, with a low around 68. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Wednesday
Sunny, with a high near 96. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Clear, with a low around 66. Southwest wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 98. Light west wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 69.
Friday
Sunny, with a high near 101.
Friday Night
Clear, with a low around 72.
Saturday
Sunny, with a high near 104.
Saturday Night
Clear, with a low around 73.
Sunday
Sunny, with a high near 102.
Sunday Night
Clear, with a low around 71.
Monday
Sunny, with a high near 99.
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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:
12:34 am PDT Jul 28, 2026
Forecast Valid:
9am PDT Jul 28, 2026-6pm PDT Aug 3, 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