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

55°F

13°C

Humidity 63%
Wind Speed SW 6 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 26 Apr 11:53 PM PDT
Extended Forecast for

Ontario CA

  • Overnight

    Overnight: A slight chance of showers. Partly cloudy, with a low around 51. West wind 5 to 10 mph. Chance of precipitation is 20%.

    Low: 51 °F

    Slight Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 66. West wind 5 to 15 mph, with gusts as high as 20 mph.

    High: 66 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 51. West wind 10 to 15 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.

    Low: 51 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 75. Light southwest wind increasing to 5 to 10 mph in the afternoon.

    High: 75 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 52. West wind 10 to 15 mph becoming light in the evening. Winds could gust as high as 20 mph.

    Low: 52 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 76.

    High: 76 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 54.

    Low: 54 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 75.

    High: 75 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

Detailed Forecast

Overnight
A slight chance of showers. Partly cloudy, with a low around 51. West wind 5 to 10 mph. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 66. West wind 5 to 15 mph, with gusts as high as 20 mph.
Monday Night
Mostly clear, with a low around 51. West wind 10 to 15 mph becoming light southwest after midnight. Winds could gust as high as 20 mph.
Tuesday
Sunny, with a high near 75. Light southwest wind increasing to 5 to 10 mph in the afternoon.
Tuesday Night
Mostly clear, with a low around 52. West wind 10 to 15 mph becoming light in the evening. Winds could gust as high as 20 mph.
Wednesday
Mostly sunny, with a high near 76.
Wednesday Night
Partly cloudy, with a low around 54.
Thursday
Mostly sunny, with a high near 75.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 56.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 57.
Sunday
Mostly sunny, with a high near 78.
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:
11:27 pm PDT Apr 26, 2026
Forecast Valid:
12am PDT Apr 27, 2026-6pm PDT May 3, 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