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

99°F

37°C

Humidity 29%
Wind Speed W 6 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 61°F (16°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 10 Sep 12:05 PM PDT
Extended Forecast for

2 Miles SSW Rancho Cucamonga CA

Extreme Heat Warning September 10, 12:27pm until September 10, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning September 10, 12:27pm until September 10, 08:00pm

    NOW until 8:00pm Thu

    Extreme Heat Warning

  • This Afternoon

    High: 105 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 73. Southwest wind around 5 mph becoming calm in the evening.

    Low: 73 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 97. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 97 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 69. Southwest wind around 5 mph.

    Low: 69 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 92. Light south wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 92 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 65.

    Low: 65 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 88.

    High: 88 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 64.

    Low: 64 °F

    Clear

Detailed Forecast

This Afternoon
Sunny, with a high near 105. West wind 5 to 10 mph, with gusts as high as 20 mph.
Tonight
Clear, with a low around 73. Southwest wind around 5 mph becoming calm in the evening.
Friday
Sunny, with a high near 97. 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 69. Southwest wind around 5 mph.
Saturday
Sunny, with a high near 92. Light south wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Mostly clear, with a low around 65.
Sunday
Sunny, with a high near 88.
Sunday Night
Clear, with a low around 64.
Monday
Sunny, with a high near 88.
Monday Night
Mostly clear, with a low around 62.
Tuesday
Sunny, with a high near 86.
Tuesday Night
Clear, with a low around 61.
Wednesday
Sunny, with a high near 87.
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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:
11:17 am PDT Sep 10, 2026
Forecast Valid:
12pm PDT Sep 10, 2026-6pm PDT Sep 16, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation