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.

Partly Cloudy

77°F

25°C

Humidity 46%
Wind Speed SW 11 MPH
Barometer 29.86 in (1011.18 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index78°F (26°C)
Last update 01 May 05:53 PM PDT
Extended Forecast for

Ontario CA

  • Tonight

    Tonight: Mostly clear, with a low around 57. West wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph.

    Low: 57 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 83. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.

    High: 83 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 56. West wind 5 to 10 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.

    Low: 56 °F

    Partly Cloudy

  • Sunday

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

    High: 74 °F

    Mostly Sunny

  • Sunday Night

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

    Low: 53 °F

    Increasing
    Clouds

  • Monday

    Monday: Partly sunny, with a high near 68.

    High: 68 °F

    Partly Sunny

  • Monday Night

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

    Low: 51 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 52.

    Low: 52 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 57. West wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 20 mph.
Saturday
Mostly sunny, with a high near 83. Light and variable wind becoming west 5 to 10 mph in the afternoon. Winds could gust as high as 20 mph.
Saturday Night
Partly cloudy, with a low around 56. West wind 5 to 10 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.
Sunday
Mostly sunny, with a high near 74. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph.
Sunday Night
Increasing clouds, 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 68.
Monday Night
Partly cloudy, with a low around 51.
Tuesday
Mostly sunny, with a high near 66.
Tuesday Night
Partly cloudy, with a low around 52.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Clear, with a low around 55.
Thursday
Sunny, with a high near 87.
Thursday Night
Clear, with a low around 60.
Friday
Sunny, with a high near 89.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.05°N 117.64°W (Elev. 919 ft)
Last Update:
12:36 pm PDT May 1, 2026
Forecast Valid:
6pm PDT May 1, 2026-6pm PDT May 8, 2026
 
Forecast Discussion
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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