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 37%
Wind Speed WSW 9 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Last update 13 Feb 11:35 AM PST
Extended Forecast for

Ontario CA

  • Today

    Today: Sunny, with a high near 72. West wind 5 to 10 mph.

    High: 72 °F

    Sunny

  • Tonight

    Tonight: Clear, with a low around 45. West wind around 5 mph becoming calm in the evening.

    Low: 45 °F

    Clear

  • Saturday

    Saturday: Sunny, with a high near 70. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 70 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47. West wind around 5 mph.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 67. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 67 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of showers between 10pm and 4am, then a chance of rain after 4am. Mostly cloudy, with a low around 48. Chance of precipitation is 30%.

    Low: 48 °F

    Chance Rain

  • Washington's Birthday

    Washington's Birthday: Rain, with thunderstorms also possible after 4pm. High near 57. Chance of precipitation is 90%.

    High: 57 °F

    Rain

  • Monday Night

    Monday Night: Rain and possibly a thunderstorm. Cloudy, with a low around 47.

    Low: 47 °F

    Rain

  • Tuesday

    Tuesday: Rain likely before 10am, then showers between 10am and 4pm, then showers and possibly a thunderstorm after 4pm. Cloudy, with a high near 58.

    High: 58 °F

    Showers

Detailed Forecast

Today
Sunny, with a high near 72. West wind 5 to 10 mph.
Tonight
Clear, with a low around 45. West wind around 5 mph becoming calm in the evening.
Saturday
Sunny, with a high near 70. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 47. West wind around 5 mph.
Sunday
Partly sunny, with a high near 67. Light southwest wind increasing to 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
A slight chance of showers between 10pm and 4am, then a chance of rain after 4am. Mostly cloudy, with a low around 48. Chance of precipitation is 30%.
Washington's Birthday
Rain, with thunderstorms also possible after 4pm. High near 57. Chance of precipitation is 90%.
Monday Night
Rain and possibly a thunderstorm. Cloudy, with a low around 47.
Tuesday
Rain likely before 10am, then showers between 10am and 4pm, then showers and possibly a thunderstorm after 4pm. Cloudy, with a high near 58.
Tuesday Night
Showers and possibly a thunderstorm before 10pm, then showers likely. Mostly cloudy, with a low around 44.
Wednesday
A chance of showers. Partly sunny, with a high near 57.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 42.
Thursday
A chance of showers. Mostly sunny, with a high near 59.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.03°N 117.61°W (Elev. 823 ft)
Last Update:
1:37 am PST Feb 13, 2026
Forecast Valid:
11am PST Feb 13, 2026-6pm PST Feb 19, 2026
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation