Current conditions at

Ontario International Airport (KONT)

Lat: 34.05316°NLon: 117.57685°WElev: 906.0ft.

Clear

75°F

24°C

Humidity 66%
Wind Speed WSW 8 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 24 Jul 11:53 PM PDT
Extended Forecast for

Rancho Cucamonga CA

Extreme Heat Warning July 25, 12:03am until July 27, 08:00pm
Click here for hazard details and duration
Extreme Heat Warning
  •  
    Extreme Heat Warning July 25, 12:03am until July 27, 08:00pm

    NOW until 8:00pm Mon

    Extreme Heat Warning

  • Overnight

    Low: 71 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 100. Light and variable wind becoming west 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

    High: 100 °F

    Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 11pm.  Otherwise, partly cloudy, with a low around 71. Southwest wind 10 to 15 mph becoming light  in the evening. Winds could gust as high as 20 mph.

    Low: 71 °F

    Patchy Fog

  • Sunday

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

    High: 98 °F

    Sunny

  • Sunday Night

    Sunday 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

  • Monday

    Monday: Sunny, with a high near 98.

    High: 98 °F

    Sunny

  • Monday Night

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

    Low: 69 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 97.

    High: 97 °F

    Sunny

Detailed Forecast

Overnight
Mostly clear, with a low around 71. Southwest wind around 5 mph becoming calm.
Saturday
Sunny, with a high near 100. Light and variable wind becoming west 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Saturday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 71. Southwest wind 10 to 15 mph becoming light in the evening. Winds could gust as high as 20 mph.
Sunday
Sunny, with a high near 98. Light south wind becoming southwest 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 west in the evening.
Monday
Sunny, with a high near 98.
Monday Night
Mostly clear, with a low around 69.
Tuesday
Sunny, with a high near 97.
Tuesday Night
Mostly clear, with a low around 68.
Wednesday
Sunny, with a high near 98.
Wednesday Night
Mostly clear, with a low around 68.
Thursday
Sunny, with a high near 99.
Thursday Night
Mostly clear, with a low around 70.
Friday
Sunny, with a high near 99.
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ABOUT THIS FORECAST

 
Point Forecast:
Rancho Cucamonga CA
 34.1°N 117.57°W (Elev. 1198 ft)
2:02 pm PDT Jul 24, 2026
12am PDT Jul 25, 2026-6pm PDT Jul 31, 2026
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database