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

79°F

26°C

Humidity 41%
Wind Speed WSW 9 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 02 May 01:20 PM PDT
Extended Forecast for

Ontario CA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 85. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 85 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 57. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.

    Low: 57 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 74. Light west wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 74 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 53. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.

    Low: 53 °F

    Partly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 67. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.

    High: 67 °F

    Partly Sunny

  • Monday Night

    Monday Night: A slight chance of showers. Partly cloudy, with a low around 51. Chance of precipitation is 20%.

    Low: 51 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 20%.

    High: 68 °F

    Slight Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 51.

    Low: 51 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 78.

    High: 78 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 85. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Tonight
Partly cloudy, with a low around 57. West wind 5 to 10 mph becoming light after midnight. Winds could gust as high as 20 mph.
Sunday
Mostly sunny, with a high near 74. Light west wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Partly cloudy, with a low around 53. Southwest wind 5 to 15 mph, with gusts as high as 20 mph.
Monday
Partly sunny, with a high near 67. Southwest wind 5 to 15 mph, with gusts as high as 25 mph.
Monday Night
A slight chance of showers. Partly cloudy, with a low around 51. Chance of precipitation is 20%.
Tuesday
A slight chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 51.
Wednesday
Sunny, with a high near 78.
Wednesday Night
Clear, with a low around 56.
Thursday
Sunny, with a high near 89.
Thursday Night
Clear, with a low around 60.
Friday
Sunny, with a high near 91.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.05°N 117.64°W (Elev. 919 ft)
Last Update:
11:21 am PDT May 2, 2026
Forecast Valid:
1pm PDT May 2, 2026-6pm PDT May 8, 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