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

90°F

32°C

Humidity 29%
Wind Speed N 0 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index88°F (31°C)
Last update 24 Aug 10:00 AM PDT
Extended Forecast for

2 Miles SSW Rancho Cucamonga CA

Heat Advisory August 24, 10:20am until August 25, 10:00am
Extreme Heat Warning August 25, 10:00am until August 28, 08:00pm
Click here for hazard details and duration
Heat Advisory
Extreme Heat Warning
  •  
    Heat Advisory August 24, 10:20am until August 25, 10:00am

    NOW until 10:00am Tue

    Heat Advisory

  • Today

    High: 101 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 72. West wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.

    Low: 72 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 103. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 103 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 73. Southwest wind 5 to 10 mph becoming light and variable in the evening.

    Low: 73 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 104. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 104 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 74.

    Low: 74 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 105.

    High: 105 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 75.

    Low: 75 °F

    Partly Cloudy

Detailed Forecast

Today
Sunny, with a high near 101. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 72. West wind 5 to 10 mph becoming light and variable in the evening. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 103. Light and variable wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Clear, with a low around 73. Southwest wind 5 to 10 mph becoming light and variable in the evening.
Wednesday
Sunny, with a high near 104. Light and variable wind becoming southwest 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 74.
Thursday
Sunny, with a high near 105.
Thursday Night
Partly cloudy, with a low around 75.
Friday
Mostly sunny, with a high near 103.
Friday Night
Mostly clear, with a low around 74.
Saturday
Sunny, with a high near 101.
Saturday Night
Clear, with a low around 71.
Sunday
Sunny, with a high near 97.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
2 Miles SSW Rancho Cucamonga CA
 34.1°N 117.59°W (Elev. 1224 ft)
Last Update:
2:04 am PDT Aug 24, 2026
Forecast Valid:
10am PDT Aug 24, 2026-6pm PDT Aug 30, 2026
 
Forecast Discussion
 
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Additional Resources

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