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

52°F

11°C

Humidity 53%
Wind Speed SW 10 MPH
Barometer 30.03 in (1016.93 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Last update 18 Feb 09:35 AM PST
Extended Forecast for

Ontario International Arpt CA

  • Today

    Today: A chance of showers before 10am. Mostly sunny, with a high near 54. West wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 54 °F

    Chance
    Showers then
    Mostly Sunny

  • Tonight

    Tonight: A slight chance of showers after 4am. Partly cloudy, with a low around 42. West wind around 5 mph becoming calm after midnight. Chance of precipitation is 10%.

    Low: 42 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Thursday

    Thursday: Showers, mainly between 10am and 4pm. The rain could be heavy at times. High near 52. East wind 5 to 10 mph becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 52 °F

    Heavy Rain

  • Thursday Night

    Thursday Night: A chance of showers, mainly before 10pm. Partly cloudy, with a low around 38. West wind 10 to 15 mph becoming northwest 5 to 10 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 38 °F

    Chance
    Showers then
    Slight Chance
    Showers

  • Friday

    Friday: Mostly sunny, with a high near 57. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 57 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 65.

    High: 65 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 44.

    Low: 44 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 69.

    High: 69 °F

    Mostly Sunny

Detailed Forecast

Today
A chance of showers before 10am. Mostly sunny, with a high near 54. West wind around 15 mph, with gusts as high as 30 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A slight chance of showers after 4am. Partly cloudy, with a low around 42. West wind around 5 mph becoming calm after midnight. Chance of precipitation is 10%.
Thursday
Showers, mainly between 10am and 4pm. The rain could be heavy at times. High near 52. East wind 5 to 10 mph becoming west 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A chance of showers, mainly before 10pm. Partly cloudy, with a low around 38. West wind 10 to 15 mph becoming northwest 5 to 10 mph after midnight. Winds could gust as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Mostly sunny, with a high near 57. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Friday Night
Mostly clear, with a low around 39.
Saturday
Mostly sunny, with a high near 65.
Saturday Night
Mostly cloudy, with a low around 44.
Sunday
Mostly sunny, with a high near 69.
Sunday Night
A slight chance of showers after 4am. Partly cloudy, with a low around 48.
Monday
A chance of showers. Partly sunny, with a high near 71.
Monday Night
A chance of showers. Mostly cloudy, with a low around 52.
Tuesday
A chance of showers. Partly sunny, with a high near 70.
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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:
2:38 am PST Feb 18, 2026
Forecast Valid:
9am PST Feb 18, 2026-6pm PST Feb 24, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation