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

88°F

31°C

Humidity 33%
Wind Speed WSW 8 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index86°F (30°C)
Last update 09 Jul 11:20 AM PDT
Extended Forecast for

3 Miles SSE Rancho Cucamonga CA

Heat Advisory July 9, 11:38am until July 10, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory July 9, 11:38am until July 10, 08:00pm

    NOW until 8:00pm Fri

    Heat Advisory

  • Today

    High: 98 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 65. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 65 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 95. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 95 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 64. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.

    Low: 64 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 95. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 95 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 66.

    Low: 66 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 94.

    High: 94 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 67.

    Low: 67 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 98. West wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 65. West wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.
Friday
Sunny, with a high near 95. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Friday Night
Mostly clear, with a low around 64. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Saturday
Mostly sunny, with a high near 95. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 66.
Sunday
Partly sunny, with a high near 94.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Mostly sunny, with a high near 95.
Monday Night
Partly cloudy, with a low around 68.
Tuesday
Mostly sunny, with a high near 99.
Tuesday Night
Mostly clear, with a low around 71.
Wednesday
A slight chance of showers. Sunny, with a high near 102.
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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:
11:27 am PDT Jul 9, 2026
Forecast Valid:
11am PDT Jul 9, 2026-6pm PDT Jul 15, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation