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.

Partly Cloudy

81°F

27°C

Humidity 42%
Wind Speed WSW 16 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Heat Index81°F (27°C)
Last update 11 Jul 06:53 PM PDT
Extended Forecast for

Ontario CA

  • Tonight

    Tonight: Partly cloudy, with a low around 65. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 65 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 92. Light southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 92 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 66. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 66 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 93. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.

    High: 93 °F

    Partly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 66. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.

    Low: 66 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 97.

    High: 97 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 101.

    High: 101 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 71.

    Low: 71 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 65. 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 92. Light southwest wind becoming west 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 66. Southwest wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Monday
Partly sunny, with a high near 93. Light southwest wind increasing to 5 to 10 mph in the morning. Winds could gust as high as 20 mph.
Monday Night
Partly cloudy, with a low around 66. Southwest wind 5 to 10 mph becoming light west after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 97.
Tuesday Night
Mostly clear, with a low around 70.
Wednesday
Sunny, with a high near 101.
Wednesday Night
Mostly clear, with a low around 71.
Thursday
Sunny, with a high near 97.
Thursday Night
Mostly clear, with a low around 68.
Friday
Mostly sunny, with a high near 92.
Friday Night
A slight chance of showers. Partly cloudy, with a low around 67.
Saturday
Mostly sunny, with a high near 91.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.05°N 117.61°W (Elev. 902 ft)
Last Update:
11:26 am PDT Jul 11, 2026
Forecast Valid:
7pm PDT Jul 11, 2026-6pm PDT Jul 18, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation