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

61°F

16°C

Humidity 67%
Wind Speed WSW 9 MPH
Barometer 29.91 in (1012.87 mb)
Dewpoint 50°F (10°C)
Visibility 10.00 mi
Last update 25 May 09:53 PM PDT
Extended Forecast for

Ontario International Arpt CA

  • Tonight

    Tonight: Patchy drizzle after 2am. Increasing clouds, with a low around 56. West wind 5 to 10 mph.

    Low: 56 °F

    Partly Cloudy
    then Patchy
    Drizzle

  • Tuesday

    Tuesday: Patchy drizzle before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 70. Light southwest wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 20 mph.

    High: 70 °F

    Patchy
    Drizzle then
    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Patchy drizzle after 2am. Mostly cloudy, with a low around 54. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    Low: 54 °F

    Partly Cloudy
    then Patchy
    Drizzle

  • Wednesday

    Wednesday: Patchy drizzle before 11am. Partly sunny, with a high near 69. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.

    High: 69 °F

    Patchy
    Drizzle then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 54. Southwest wind 10 to 15 mph becoming light south after midnight. Winds could gust as high as 20 mph.

    Low: 54 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly cloudy, then gradually becoming sunny, with a high near 70.

    High: 70 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 52.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Friday Night

    Friday Night: Clear, with a low around 55.

    Low: 55 °F

    Clear

Detailed Forecast

Tonight
Patchy drizzle after 2am. Increasing clouds, with a low around 56. West wind 5 to 10 mph.
Tuesday
Patchy drizzle before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 70. Light southwest wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 20 mph.
Tuesday Night
Patchy drizzle after 2am. Mostly cloudy, with a low around 54. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Wednesday
Patchy drizzle before 11am. Partly sunny, with a high near 69. Southeast wind 5 to 10 mph becoming southwest in the afternoon. Winds could gust as high as 20 mph.
Wednesday Night
Increasing clouds, with a low around 54. Southwest wind 10 to 15 mph becoming light south after midnight. Winds could gust as high as 20 mph.
Thursday
Mostly cloudy, then gradually becoming sunny, with a high near 70.
Thursday Night
Mostly clear, with a low around 52.
Friday
Sunny, with a high near 74.
Friday Night
Clear, with a low around 55.
Saturday
Sunny, with a high near 81.
Saturday Night
Clear, with a low around 58.
Sunday
Sunny, with a high near 86.
Sunday Night
Clear, with a low around 60.
Monday
Sunny, with a high near 90.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario International Arpt CA
 34.05°N 117.61°W (Elev. 902 ft)
Last Update:
5:11 pm PDT May 25, 2026
Forecast Valid:
10pm PDT May 25, 2026-6pm PDT Jun 1, 2026
 
Forecast Discussion
 
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