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.

Mist

65°F

18°C

Humidity 93%
Wind Speed W 3 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 63°F (17°C)
Visibility 5.00 mi
Last update 24 Sep 06:53 AM PDT
Extended Forecast for

Rancho Cucamonga CA

  • Today

    Today: 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

  • Tonight

    Tonight: Mostly clear, with a low around 69. West wind 5 to 10 mph becoming light and variable in the evening.

    Low: 69 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 93. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 93 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 69. Southwest wind around 5 mph becoming calm in the evening.

    Low: 69 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 93. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 93 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 69.

    Low: 69 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers before 11am. Mostly sunny, with a high near 84. Chance of precipitation is 20%.

    High: 84 °F

    Slight Chance
    Showers then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 63.

    Low: 63 °F

    Mostly Clear

  • Monday

    Monday: A slight chance of showers. Mostly sunny, with a high near 81.

    High: 81 °F

    Slight Chance
    Showers

Detailed Forecast

Today
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.
Tonight
Mostly clear, with a low around 69. West wind 5 to 10 mph becoming light and variable in the evening.
Friday
Sunny, with a high near 93. 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 69. Southwest wind around 5 mph becoming calm in the evening.
Saturday
Mostly sunny, with a high near 93. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 69.
Sunday
A slight chance of showers before 11am. Mostly sunny, with a high near 84. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 63.
Monday
A slight chance of showers. Mostly sunny, with a high near 81.
Monday Night
Mostly clear, with a low around 61.
Tuesday
Sunny, with a high near 87.
Tuesday Night
Clear, with a low around 65.
Wednesday
Sunny, with a high near 89.
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ABOUT THIS FORECAST

 
Point Forecast:
Rancho Cucamonga CA
 34.1°N 117.57°W (Elev. 1198 ft)
Last Update:
12:13 am PDT Sep 24, 2026
Forecast Valid:
7am PDT Sep 24, 2026-6pm PDT Sep 30, 2026
 
Forecast Discussion
 
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Additional Resources

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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