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

58°F

14°C

Humidity 55%
Wind Speed S 8 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Last update 18 Nov 11:53 AM PST
Extended Forecast for

Ontario International Arpt CA

  • This Afternoon

    This Afternoon: A chance of showers. Mostly sunny, with a high near 59. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 59 °F

    Chance
    Showers

  • Tonight

    Tonight: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 44. North wind around 5 mph becoming calm after midnight.

    Low: 44 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 7am. Otherwise, sunny, with a high near 60. Calm wind becoming west around 5 mph in the afternoon.

    High: 60 °F

    Patchy Fog
    then Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 46. West wind around 5 mph becoming northeast after midnight.

    Low: 46 °F

    Partly Cloudy

  • Thursday

    Thursday: A chance of showers after 10am. Partly sunny, with a high near 58. East wind around 5 mph becoming south in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 58 °F

    Chance
    Showers

  • Thursday Night

    Thursday Night: Showers likely. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.

    Low: 48 °F

    Showers
    Likely

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 60. Chance of precipitation is 50%.

    High: 60 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 63.

    High: 63 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A chance of showers. Mostly sunny, with a high near 59. Calm wind becoming southwest around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 44. North wind around 5 mph becoming calm after midnight.
Wednesday
Patchy fog before 7am. Otherwise, sunny, with a high near 60. Calm wind becoming west around 5 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 46. West wind around 5 mph becoming northeast after midnight.
Thursday
A chance of showers after 10am. Partly sunny, with a high near 58. East wind around 5 mph becoming south in the afternoon. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Showers likely. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.
Friday
A chance of showers. Mostly cloudy, with a high near 60. Chance of precipitation is 50%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 48.
Saturday
Partly sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 47.
Sunday
Mostly sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 48.
Monday
Mostly sunny, with a high near 67.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario International Arpt CA
 34.05°N 117.61°W (Elev. 902 ft)
Last Update:
5:45 am PST Nov 18, 2025
Forecast Valid:
12pm PST Nov 18, 2025-6pm PST Nov 24, 2025
 
Forecast Discussion
 
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Additional Resources

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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