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

81°F

27°C

Humidity 42%
Wind Speed WSW 13 MPH
Barometer 29.82 in (1009.82 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 02 May 04:35 PM PDT
Extended Forecast for

Ontario CA

  • Tonight

    Tonight: Partly cloudy, with a low around 57. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 74. Light west wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 53. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 53 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 67. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 67 °F

    Partly Sunny

  • Monday Night

    Monday Night: A slight chance of showers. Partly cloudy, with a low around 51. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.

    Low: 51 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 20%.

    High: 68 °F

    Slight Chance
    Showers

  • Tuesday Night

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

    Low: 51 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Clear, with a low around 56.

    Low: 56 °F

    Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 57. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Sunday
Mostly sunny, with a high near 74. Light west wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 53. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 67. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 51. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 20%.
Tuesday
A slight chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Clear, with a low around 56.
Thursday
Sunny, with a high near 89.
Thursday Night
Clear, with a low around 60.
Friday
Sunny, with a high near 91.
Friday Night
Mostly clear, with a low around 62.
Saturday
Sunny, with a high near 90.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.05°N 117.64°W (Elev. 919 ft)
Last Update:
11:21 am PDT May 2, 2026
Forecast Valid:
4pm PDT May 2, 2026-6pm PDT May 9, 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