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.

Rain

61°F

16°C

Humidity 87%
Wind Speed WNW 13 MPH
Barometer 29.78 in (1008.47 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 13 Nov 02:05 PM PST
Extended Forecast for

Rancho Cucamonga CA

  • This Afternoon

    This Afternoon: Showers likely, mainly before 4pm. Mostly cloudy, with a high near 66. Southwest wind around 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 66 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers, mainly after 10pm. Low around 54. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 54 °F

    Showers

  • Saturday

    Saturday: Mostly cloudy, then gradually becoming sunny, with a high near 66. Calm wind becoming east around 5 mph.

    High: 66 °F

    Decreasing
    Clouds

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 51. Calm wind becoming northeast around 5 mph.

    Low: 51 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 69. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 69 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 54.

    Low: 54 °F

    Mostly Cloudy

  • Monday

    Monday: Showers likely and possibly a thunderstorm after 4pm. Partly sunny, with a high near 66. Chance of precipitation is 60%.

    High: 66 °F

    Mostly Sunny
    then Showers
    Likely

  • Monday Night

    Monday Night: Showers likely and possibly a thunderstorm, then showers after 10pm. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers, mainly before 10am. Mostly sunny, with a high near 62.

    High: 62 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
Showers likely, mainly before 4pm. Mostly cloudy, with a high near 66. Southwest wind around 10 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers, mainly after 10pm. Low around 54. West wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly cloudy, then gradually becoming sunny, with a high near 66. Calm wind becoming east around 5 mph.
Saturday Night
Mostly clear, with a low around 51. Calm wind becoming northeast around 5 mph.
Sunday
Sunny, with a high near 69. Calm wind becoming southwest around 5 mph in the afternoon.
Sunday Night
Mostly cloudy, with a low around 54.
Monday
Showers likely and possibly a thunderstorm after 4pm. Partly sunny, with a high near 66. Chance of precipitation is 60%.
Monday Night
Showers likely and possibly a thunderstorm, then showers after 10pm. Mostly cloudy, with a low around 51.
Tuesday
A chance of showers, mainly before 10am. Mostly sunny, with a high near 62.
Tuesday Night
Mostly clear, with a low around 45.
Wednesday
Sunny, with a high near 63.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 49.
Thursday
A chance of showers. Partly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Rancho Cucamonga CA
 34.12°N 117.6°W (Elev. 1368 ft)
Last Update:
12:19 pm PST Nov 13, 2026
Forecast Valid:
2pm PST Nov 13, 2026-6pm PST Nov 19, 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