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 21%
Wind Speed N 0 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 29 Mar 11:05 AM PDT
Extended Forecast for

Ontario International Arpt CA

  • Today

    Today: Sunny, with a high near 91. Light west wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 91 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 58. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 58 °F

    Mostly Clear

  • Monday

    Monday: Partly sunny, with a high near 83. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 83 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 57. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 77. Southwest wind 5 to 10 mph.

    High: 77 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 11pm. Mostly cloudy, with a low around 56. Chance of precipitation is 20%.

    Low: 56 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: A slight chance of showers before 11am. Partly sunny, with a high near 74. Chance of precipitation is 20%.

    High: 74 °F

    Slight Chance
    Showers then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 55.

    Low: 55 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 74.

    High: 74 °F

    Partly Sunny

Detailed Forecast

Today
Sunny, with a high near 91. Light west wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Tonight
Mostly clear, with a low around 58. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Monday
Partly sunny, with a high near 83. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Monday Night
Mostly cloudy, with a low around 57. West wind 5 to 10 mph, with gusts as high as 20 mph.
Tuesday
Mostly cloudy, with a high near 77. Southwest wind 5 to 10 mph.
Tuesday Night
A slight chance of showers after 11pm. Mostly cloudy, with a low around 56. Chance of precipitation is 20%.
Wednesday
A slight chance of showers before 11am. Partly sunny, with a high near 74. Chance of precipitation is 20%.
Wednesday Night
Mostly cloudy, with a low around 55.
Thursday
Partly sunny, with a high near 74.
Thursday Night
Partly cloudy, with a low around 53.
Friday
Mostly sunny, with a high near 79.
Friday Night
Mostly clear, with a low around 53.
Saturday
Sunny, with a high near 86.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario International Arpt CA
 34.06°N 117.58°W (Elev. 906 ft)
Last Update:
12:16 am PDT Mar 29, 2026
Forecast Valid:
11am PDT Mar 29, 2026-6pm PDT Apr 4, 2026
 
Forecast Discussion
 
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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