National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Ontario International Airport (KONT)

Lat: 34.05316°NLon: 117.57685°WElev: 906.0ft.

Clear

54°F

12°C

Humidity 66%
Wind Speed N 4 MPH
Barometer 30.01 in (1016.26 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 29 Nov 01:05 AM PST
Extended Forecast for

Ontario International Arpt CA

  • Overnight

    Overnight: Mostly clear, with a low around 49. Calm wind.

    Low: 49 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 73. Calm wind becoming west around 5 mph in the afternoon.

    High: 73 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 48. West wind around 5 mph becoming calm in the evening.

    Low: 48 °F

    Mostly Clear
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 10am. Otherwise, mostly cloudy through mid morning, then becoming sunny, with a high near 69. Light south wind becoming west 5 to 10 mph in the afternoon.

    High: 69 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog. Otherwise, partly cloudy, with a low around 47. West wind around 5 mph becoming calm after midnight.

    Low: 47 °F

    Patchy Fog

  • Monday

    Monday: Sunny, with a high near 72.

    High: 72 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 46.

    Low: 46 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 68.

    High: 68 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 4am. Partly cloudy, with a low around 48.

    Low: 48 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

Detailed Forecast

Overnight
Mostly clear, with a low around 49. Calm wind.
Saturday
Mostly sunny, with a high near 73. Calm wind becoming west around 5 mph in the afternoon.
Saturday Night
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 48. West wind around 5 mph becoming calm in the evening.
Sunday
Patchy fog before 10am. Otherwise, mostly cloudy through mid morning, then becoming sunny, with a high near 69. Light south wind becoming west 5 to 10 mph in the afternoon.
Sunday Night
Patchy fog. Otherwise, partly cloudy, with a low around 47. West wind around 5 mph becoming calm after midnight.
Monday
Sunny, with a high near 72.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Sunny, with a high near 68.
Tuesday Night
A slight chance of showers after 4am. Partly cloudy, with a low around 48.
Wednesday
A chance of showers, mainly after 10am. Partly sunny, with a high near 63.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 48.
Thursday
A slight chance of showers. Mostly sunny, with a high near 66.
Thursday Night
Mostly clear, with a low around 48.
Friday
Sunny, with a high near 71.
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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:
1:13 am PST Nov 29, 2025
Forecast Valid:
1am PST Nov 29, 2025-6pm PST Dec 5, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation