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

66°F

19°C

Humidity 63%
Wind Speed N 0 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 17 Jun 06:20 AM PDT
Extended Forecast for

Rancho Cucamonga CA

Heat Advisory June 17, 06:35am until June 18, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory June 17, 06:35am until June 18, 08:00pm

    NOW until 8:00pm Wed

    Heat Advisory

  • Today

    High: 93 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 67. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 67 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 94. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 94 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 65. West wind 10 to 15 mph becoming light southwest after midnight. Winds could gust as high as 25 mph.

    Low: 65 °F

    Mostly Clear

  • Juneteenth

    Juneteenth: Sunny, with a high near 90. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 90 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 86.

    High: 86 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

Detailed Forecast

Today
Sunny, with a high near 93. Light west wind becoming southwest 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 67. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Wednesday
Sunny, with a high near 94. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 65. West wind 10 to 15 mph becoming light southwest after midnight. Winds could gust as high as 25 mph.
Juneteenth
Sunny, with a high near 90. Light southwest wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Thursday Night
Mostly clear, with a low around 62.
Friday
Sunny, with a high near 86.
Friday Night
Mostly clear, with a low around 59.
Saturday
Sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 82.
Sunday Night
Mostly clear, with a low around 58.
Monday
Sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Rancho Cucamonga CA
 34.12°N 117.6°W (Elev. 1368 ft)
Last Update:
3:02 am PDT Jun 17, 2025
Forecast Valid:
6am PDT Jun 17, 2025-6pm PDT Jun 23, 2025
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation