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.

Mostly Cloudy

57°F

14°C

Humidity 83%
Wind Speed SW 4 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 12 Apr 03:53 AM PDT
Extended Forecast for

3 Miles SSE Rancho Cucamonga CA

  • Overnight

    Overnight: A slight chance of showers. Mostly cloudy, with a low around 52. Southwest wind around 5 mph. Chance of precipitation is 20%.

    Low: 52 °F

    Slight Chance
    Showers

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 62. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 62 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 48. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 48 °F

    Partly Cloudy

  • Monday

    Monday: A slight chance of showers. Mostly sunny, with a high near 65. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    High: 65 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 49. West wind 10 to 15 mph becoming light northwest after midnight. Winds could gust as high as 20 mph.

    Low: 49 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 49.

    Low: 49 °F

    Clear

  • Wednesday

    Wednesday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Overnight
A slight chance of showers. Mostly cloudy, with a low around 52. Southwest wind around 5 mph. Chance of precipitation is 20%.
Sunday
Showers likely, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 62. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Sunday Night
Partly cloudy, with a low around 48. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Monday
A slight chance of showers. Mostly sunny, with a high near 65. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Monday Night
Partly cloudy, with a low around 49. West wind 10 to 15 mph becoming light northwest after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 72.
Tuesday Night
Clear, with a low around 49.
Wednesday
Sunny, with a high near 74.
Wednesday Night
Mostly clear, with a low around 53.
Thursday
Mostly sunny, with a high near 73.
Thursday Night
Mostly clear, with a low around 52.
Friday
Sunny, with a high near 76.
Friday Night
Clear, with a low around 52.
Saturday
Sunny, with a high near 81.
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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:
12:04 am PDT Apr 12, 2026
Forecast Valid:
4am PDT Apr 12, 2026-6pm PDT Apr 18, 2026
 
Forecast Discussion
 
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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