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

77°F

25°C

Humidity 31%
Wind Speed WSW 12 MPH
Barometer 29.88 in (1011.85 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 23 Apr 04:55 PM PDT
Extended Forecast for

Ontario CA

  • Tonight

    Tonight: Mostly clear, with a low around 53. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 25 mph.

    Low: 53 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 76. Light west wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 76 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Increasing clouds, with a low around 55. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 55 °F

    Increasing
    Clouds

  • Saturday

    Saturday: A slight chance of showers after 11am. Partly sunny, with a high near 67. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers. Mostly cloudy, with a low around 51. West wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Chance
    Showers

  • Sunday

    Sunday: A slight chance of showers before 11am. Mostly sunny, with a high near 67. Chance of precipitation is 20%.

    High: 67 °F

    Slight Chance
    Showers then
    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 72.

    High: 72 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 50.

    Low: 50 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 53. West wind 10 to 15 mph becoming light after midnight. Winds could gust as high as 25 mph.
Friday
Mostly sunny, with a high near 76. Light west wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Friday Night
Increasing clouds, with a low around 55. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Saturday
A slight chance of showers after 11am. Partly sunny, with a high near 67. Southwest wind 10 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 20%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 51. West wind 5 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A slight chance of showers before 11am. Mostly sunny, with a high near 67. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 50.
Monday
Mostly sunny, with a high near 72.
Monday Night
Partly cloudy, with a low around 50.
Tuesday
Mostly sunny, with a high near 76.
Tuesday Night
Partly cloudy, with a low around 53.
Wednesday
Mostly sunny, with a high near 74.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Sunny, with a high near 77.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.05°N 117.64°W (Elev. 919 ft)
Last Update:
11:49 am PDT Apr 23, 2026
Forecast Valid:
5pm PDT Apr 23, 2026-6pm PDT Apr 30, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation