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.

Partly Cloudy

94°F

34°C

Humidity 32%
Wind Speed WSW 11 MPH
Barometer 29.87 in (1011.51 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index94°F (34°C)
Last update 09 Aug 01:53 PM PDT
Extended Forecast for

3 Miles SSE Rancho Cucamonga CA

Heat Advisory August 9, 02:05pm until August 9, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 9, 02:05pm until August 9, 08:00pm

    NOW until 8:00pm Sun

    Heat Advisory

  • This Afternoon

    High: 101 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 70. Southwest wind 5 to 10 mph becoming light and variable after midnight. Winds could gust as high as 20 mph.

    Low: 70 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 95. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 25 mph.

    High: 95 °F

    Sunny

  • Monday Night

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

    Low: 68 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 92. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 92 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 66.

    Low: 66 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 89.

    High: 89 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 101. West wind 10 to 15 mph, with gusts as high as 20 mph.
Tonight
Partly cloudy, with a low around 70. Southwest 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 95. Light and variable wind becoming southwest 5 to 10 mph in the morning. Winds could gust as high as 25 mph.
Monday Night
Partly cloudy, with a low around 68. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Tuesday
Mostly sunny, with a high near 92. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.
Tuesday Night
Mostly clear, with a low around 66.
Wednesday
Sunny, with a high near 89.
Wednesday Night
Mostly clear, with a low around 64.
Thursday
Mostly sunny, with a high near 86.
Thursday Night
Partly cloudy, with a low around 62.
Friday
Mostly sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 63.
Saturday
Sunny, with a high near 88.
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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:
12:20 pm PDT Aug 9, 2026
Forecast Valid:
2pm PDT Aug 9, 2026-6pm PDT Aug 15, 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