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 25%
Wind Speed WSW 14 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Heat Index98°F (37°C)
Last update 25 Jul 04:20 PM PDT
Extended Forecast for

3 Miles SSE Rancho Cucamonga CA

Extreme Heat Warning July 25, 04:41pm until July 27, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 25, 04:41pm until July 27, 08:00pm

    NOW until 8:00pm Mon

    Extreme Heat Warning

  • Tonight

    Low: 71 °F

    Mostly Clear

  • Sunday

    Sunday: 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

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light in the evening.

    Low: 70 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 98. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 98 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.

    Low: 70 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 98.

    High: 98 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 97.

    High: 97 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 71. West wind 10 to 15 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.
Sunday
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.
Sunday Night
Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light in the evening.
Monday
Sunny, with a high near 98. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 98.
Tuesday Night
Mostly clear, with a low around 69.
Wednesday
Sunny, with a high near 97.
Wednesday Night
Clear, with a low around 68.
Thursday
Sunny, with a high near 98.
Thursday Night
Mostly clear, with a low around 69.
Friday
Sunny, with a high near 101.
Friday Night
Mostly clear, with a low around 71.
Saturday
Sunny, with a high near 103.
Basemap Options
Click map to change the forecast location
Loading map...
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:
11:41 am PDT Jul 25, 2026
Forecast Valid:
4pm PDT Jul 25, 2026-6pm PDT Aug 1, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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