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.

Mostly Cloudy

60°F

16°C

Humidity 80%
Wind Speed N 0 MPH
Barometer 29.92 in (1013.21 mb)
Dewpoint 54°F (12°C)
Visibility 7.00 mi
Last update 09 Apr 04:53 AM PDT
Extended Forecast for

Ontario CA

  • Today

    Today: Mostly sunny, with a high near 81. Light west wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 81 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 57. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Partly Cloudy

  • Friday

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

    High: 76 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers, mainly after 11pm. Mostly cloudy, with a low around 57. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers. Partly sunny, with a high near 68. West wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.

    High: 68 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after 11pm. Increasing clouds, with a low around 55. Chance of precipitation is 70%.

    Low: 55 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 11am. Partly sunny, with a high near 64. Chance of precipitation is 70%.

    High: 64 °F

    Showers
    Likely then
    Chance
    Showers

  • Sunday Night

    Sunday Night: A slight chance of showers. Partly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

Detailed Forecast

Today
Mostly sunny, with a high near 81. Light west wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Tonight
Partly cloudy, with a low around 57. Southwest wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 76. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Friday Night
A chance of showers, mainly after 11pm. Mostly cloudy, with a low around 57. Southwest wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A slight chance of showers. Partly sunny, with a high near 68. West wind 5 to 10 mph increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph. Chance of precipitation is 20%.
Saturday Night
Showers likely, mainly after 11pm. Increasing clouds, with a low around 55. Chance of precipitation is 70%.
Sunday
Showers likely, with thunderstorms also possible after 11am. Partly sunny, with a high near 64. Chance of precipitation is 70%.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 74.
Tuesday Night
Mostly clear, with a low around 51.
Wednesday
Sunny, with a high near 78.
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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:
1:35 am PDT Apr 9, 2026
Forecast Valid:
5am PDT Apr 9, 2026-6pm PDT Apr 15, 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