National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Ontario International Airport (KONT)

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

Clear

70°F

21°C

Humidity 56%
Wind Speed SW 14 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 30 Apr 06:05 PM PDT
Extended Forecast for

Rancho Cucamonga CA

  • Tonight

    Tonight: Mostly clear, with a low around 55. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 55 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 81. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 81 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 57. West wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 83. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 83 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 56 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 73.

    High: 73 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 53.

    Low: 53 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 55. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 20 mph.
Friday
Sunny, with a high near 81. 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 57. West wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph.
Saturday
Sunny, with a high near 83. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 25 mph.
Saturday Night
Partly cloudy, with a low around 56. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Sunday
Mostly sunny, with a high near 73.
Sunday Night
Partly cloudy, with a low around 53.
Monday
Mostly sunny, with a high near 68.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
Partly cloudy, with a low around 53.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rancho Cucamonga CA
 34.1°N 117.59°W (Elev. 1224 ft)
Last Update:
12:45 pm PDT Apr 30, 2026
Forecast Valid:
6pm PDT Apr 30, 2026-6pm PDT May 7, 2026
 
Forecast Discussion
 
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Additional Resources

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