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

78°F

26°C

Humidity 33%
Wind Speed WSW 9 MPH
Barometer 29.85 in (1010.84 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 19 Oct 06:53 PM PDT
Extended Forecast for

Ontario International Arpt CA

  • Tonight

    Tonight: Clear, with a low around 61. West wind around 5 mph becoming calm in the evening.

    Low: 61 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 82. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 82 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 59. Southwest wind around 5 mph becoming calm after midnight.

    Low: 59 °F

    Mostly Clear

  • Wednesday

    Wednesday: A chance of showers after 11am. Partly sunny, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 74 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers. Low around 58. Southwest wind around 5 mph becoming southeast in the evening. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 58 °F

    Showers

  • Thursday

    Thursday: Showers and possibly a thunderstorm. High near 68. Chance of precipitation is 80%.

    High: 68 °F

    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers before 11pm. Partly cloudy, with a low around 53. Chance of precipitation is 20%.

    Low: 53 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 55.

    Low: 55 °F

    Clear

Detailed Forecast

Tonight
Clear, with a low around 61. West wind around 5 mph becoming calm in the evening.
Tuesday
Sunny, with a high near 82. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 59. Southwest wind around 5 mph becoming calm after midnight.
Wednesday
A chance of showers after 11am. Partly sunny, with a high near 74. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Showers. Low around 58. Southwest wind around 5 mph becoming southeast in the evening. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Showers and possibly a thunderstorm. High near 68. Chance of precipitation is 80%.
Thursday Night
A slight chance of showers before 11pm. Partly cloudy, with a low around 53. Chance of precipitation is 20%.
Friday
Sunny, with a high near 72.
Friday Night
Clear, with a low around 55.
Saturday
Sunny, with a high near 78.
Saturday Night
Mostly clear, with a low around 57.
Sunday
Sunny, with a high near 79.
Sunday Night
Mostly clear, with a low around 58.
Monday
Mostly sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario International Arpt CA
 34.07°N 117.62°W (Elev. 1017 ft)
Last Update:
12:08 pm PDT Oct 19, 2026
Forecast Valid:
7pm PDT Oct 19, 2026-6pm PDT Oct 26, 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