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

91°F

33°C

Humidity 33%
Wind Speed WSW 11 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 59°F (15°C)
Visibility 10.00 mi
Heat Index90°F (32°C)
Last update 05 Aug 03:15 PM PDT
Extended Forecast for

3 Miles SSE Rancho Cucamonga CA

Heat Advisory August 5, 03:35pm until August 8, 08:00pm
Click here for hazard details and duration
Heat Advisory
  •  
    Heat Advisory August 5, 03:35pm until August 8, 08:00pm

    NOW until 8:00pm Sat

    Heat Advisory

  • Tonight

    Low: 68 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 95. Light south wind becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 95 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 69. West wind 5 to 10 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.

    Low: 69 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 99. Light southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 99 °F

    Sunny

  • Friday Night

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

    Low: 70 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 100.

    High: 100 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 98.

    High: 98 °F

    Sunny

Detailed Forecast

Tonight
Mostly clear, with a low around 68. Southwest wind 5 to 10 mph becoming light northwest in the evening. Winds could gust as high as 20 mph.
Thursday
Sunny, with a high near 95. Light south 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 69. West wind 5 to 10 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.
Friday
Sunny, with a high near 99. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 70. Southwest wind 5 to 10 mph becoming light west in the evening.
Saturday
Sunny, with a high near 100.
Saturday Night
Mostly clear, with a low around 70.
Sunday
Sunny, with a high near 98.
Sunday Night
Mostly clear, with a low around 69.
Monday
Mostly sunny, with a high near 95.
Monday Night
Mostly clear, with a low around 68.
Tuesday
Sunny, with a high near 93.
Tuesday Night
Mostly clear, with a low around 67.
Wednesday
Sunny, with a high near 91.
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:
12:03 pm PDT Aug 5, 2026
Forecast Valid:
3pm PDT Aug 5, 2026-6pm PDT Aug 12, 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