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

68°F

20°C

Humidity 34%
Wind Speed N 3 MPH
Barometer 30.02 in (1016.59 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Last update 18 Oct 01:55 AM PDT
Extended Forecast for

Ontario International Arpt CA

  • Overnight

    Overnight: Mostly clear, with a low around 64. Calm wind.

    Low: 64 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 87. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 87 °F

    Sunny

  • Sunday Night

    Sunday Night: Clear, with a low around 62. West wind 5 to 10 mph becoming light and variable in the evening.

    Low: 62 °F

    Clear

  • Monday

    Monday: Sunny, with a high near 85. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 85 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 61. Southwest wind 5 to 10 mph becoming light in the evening.

    Low: 61 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 81.

    High: 81 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 61.

    Low: 61 °F

    Patchy Fog

  • Wednesday

    Wednesday: A chance of showers. Partly sunny, with a high near 75.

    High: 75 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 64. Calm wind.
Sunday
Sunny, with a high near 87. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Sunday Night
Clear, with a low around 62. West wind 5 to 10 mph becoming light and variable in the evening.
Monday
Sunny, with a high near 85. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Monday Night
Mostly clear, with a low around 61. Southwest wind 5 to 10 mph becoming light in the evening.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Patchy fog after 11pm. Otherwise, partly cloudy, with a low around 61.
Wednesday
A chance of showers. Partly sunny, with a high near 75.
Wednesday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 57.
Thursday
Showers and possibly a thunderstorm. Mostly cloudy, with a high near 68.
Thursday Night
A chance of showers. Partly cloudy, with a low around 54.
Friday
Sunny, with a high near 70.
Friday Night
Mostly clear, with a low around 54.
Saturday
Sunny, with a high near 74.
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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:
12:45 am PDT Oct 18, 2026
Forecast Valid:
2am PDT Oct 18, 2026-6pm PDT Oct 24, 2026
 
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