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.

Overcast

70°F

21°C

Humidity 56%
Wind Speed W 5 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 29 Jun 11:05 AM PDT
Extended Forecast for

Ontario International Arpt CA

  • Today

    Today: Sunny, with a high near 79. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 79 °F

    Sunny

  • Tonight

    Tonight: Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 58. West wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.

    Low: 58 °F

    Patchy Fog

  • Tuesday

    Tuesday: Patchy drizzle and fog before 11am. Mostly cloudy through mid morning, then gradual clearing, with a high near 79. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 79 °F

    Patchy
    Drizzle and
    Patchy Fog
    then Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 57. West wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Partly sunny, then gradually becoming sunny, with a high near 81. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 81 °F

    Becoming
    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 57.

    Low: 57 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 85.

    High: 85 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 79. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
Patchy fog after 11pm. Otherwise, increasing clouds, with a low around 58. West wind 10 to 15 mph decreasing to 5 to 10 mph after midnight. Winds could gust as high as 25 mph.
Tuesday
Patchy drizzle and fog before 11am. Mostly cloudy through mid morning, then gradual clearing, with a high near 79. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Tuesday Night
Increasing clouds, with a low around 57. West wind 5 to 15 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, then gradually becoming sunny, with a high near 81. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Mostly clear, with a low around 57.
Thursday
Sunny, with a high near 85.
Thursday Night
Mostly clear, with a low around 59.
Friday
Mostly sunny, with a high near 86.
Friday Night
Partly cloudy, with a low around 60.
Independence Day
Mostly sunny, with a high near 88.
Saturday Night
Partly cloudy, with a low around 61.
Sunday
Sunny, with a high near 89.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario International Arpt CA
 34.06°N 117.58°W (Elev. 906 ft)
Last Update:
12:04 am PDT Jun 29, 2026
Forecast Valid:
11am PDT Jun 29, 2026-6pm PDT Jul 5, 2026
 
Forecast Discussion
 
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Additional Resources

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