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

64°F

18°C

Humidity 80%
Wind Speed NW 3 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 02 Jan 02:53 PM PST
Extended Forecast for

Ontario CA

  • This Afternoon

    This Afternoon: A chance of showers. Partly sunny, with a high near 67. North wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 67 °F

    Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers. Mostly cloudy, with a low around 54. Calm wind. Chance of precipitation is 20%.

    Low: 54 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Showers, mainly after 10am. High near 63. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Showers

  • Saturday Night

    Saturday Night: Showers, mainly before 10pm. Low around 54. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 54 °F

    Showers then
    Chance
    Showers

  • Sunday

    Sunday: Showers likely, mainly after 4pm. Mostly cloudy, with a high near 63. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 63 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly before 10pm. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.

    Low: 51 °F

    Showers
    Likely

  • Monday

    Monday: A slight chance of showers. Partly sunny, with a high near 61. Chance of precipitation is 20%.

    High: 61 °F

    Slight Chance
    Showers

  • Monday Night

    Monday Night: A chance of showers, mainly after 10pm. Mostly cloudy, with a low around 47.

    Low: 47 °F

    Chance
    Showers

  • Tuesday

    Tuesday: A chance of showers. Partly sunny, with a high near 61.

    High: 61 °F

    Chance
    Showers

Detailed Forecast

This Afternoon
A chance of showers. Partly sunny, with a high near 67. North wind around 5 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A slight chance of showers. Mostly cloudy, with a low around 54. Calm wind. Chance of precipitation is 20%.
Saturday
Showers, mainly after 10am. High near 63. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Showers, mainly before 10pm. Low around 54. West wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Showers likely, mainly after 4pm. Mostly cloudy, with a high near 63. Southwest wind 5 to 10 mph, with gusts as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Sunday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 51. Chance of precipitation is 60%.
Monday
A slight chance of showers. Partly sunny, with a high near 61. Chance of precipitation is 20%.
Monday Night
A chance of showers, mainly after 10pm. Mostly cloudy, with a low around 47.
Tuesday
A chance of showers. Partly sunny, with a high near 61.
Tuesday Night
A slight chance of showers. Partly cloudy, with a low around 45.
Wednesday
A slight chance of showers. Mostly sunny, with a high near 61.
Wednesday Night
A slight chance of showers. Partly cloudy, with a low around 43.
Thursday
A slight chance of showers. Mostly sunny, with a high near 62.
Thursday Night
Mostly clear, with a low around 42.
Friday
Sunny, with a high near 62.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.03°N 117.61°W (Elev. 823 ft)
Last Update:
12:55 pm PST Jan 2, 2026
Forecast Valid:
3pm PST Jan 2, 2026-6pm PST Jan 9, 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