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

53°F

12°C

Humidity 79%
Wind Speed WNW 3 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 47°F (8°C)
Visibility 10.00 mi
Last update 13 Feb 10:53 PM PST
Extended Forecast for

Ontario CA

  • Tonight

    Tonight: Mostly clear, with a low around 45. Calm wind.

    Low: 45 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 70. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 70 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 47. Southwest wind around 5 mph becoming calm.

    Low: 47 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 67. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.

    High: 67 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A chance of showers, mainly after 4am. The rain could be heavy at times. Mostly cloudy, with a low around 48. Southwest wind around 5 mph becoming calm. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Heavy Rain

  • Washington's Birthday

    Washington's Birthday: Showers, mainly after 10am. The rain could be heavy at times. High near 57. Chance of precipitation is 90%.

    High: 57 °F

    Heavy Rain

  • Monday Night

    Monday Night: Showers. Low around 47. Chance of precipitation is 100%.

    Low: 47 °F

    Showers

  • Tuesday

    Tuesday: Showers. Cloudy, with a high near 58.

    High: 58 °F

    Showers

  • Tuesday Night

    Tuesday Night: Showers. Cloudy, with a low around 45.

    Low: 45 °F

    Showers

Detailed Forecast

Tonight
Mostly clear, with a low around 45. Calm wind.
Saturday
Sunny, with a high near 70. Calm wind becoming southwest around 5 mph in the afternoon.
Saturday Night
Mostly cloudy, with a low around 47. Southwest wind around 5 mph becoming calm.
Sunday
Partly sunny, with a high near 67. Light and variable wind becoming southwest 5 to 10 mph in the afternoon.
Sunday Night
A chance of showers, mainly after 4am. The rain could be heavy at times. Mostly cloudy, with a low around 48. Southwest wind around 5 mph becoming calm. Chance of precipitation is 30%. New precipitation amounts between a tenth and quarter of an inch possible.
Washington's Birthday
Showers, mainly after 10am. The rain could be heavy at times. High near 57. Chance of precipitation is 90%.
Monday Night
Showers. Low around 47. Chance of precipitation is 100%.
Tuesday
Showers. Cloudy, with a high near 58.
Tuesday Night
Showers. Cloudy, with a low around 45.
Wednesday
Showers likely, mainly before 4pm. Mostly cloudy, with a high near 56.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 41.
Thursday
A slight chance of showers. Mostly sunny, with a high near 60.
Thursday Night
A slight chance of showers. Mostly clear, with a low around 41.
Friday
Sunny, with a high near 64.
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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:
12:37 pm PST Feb 13, 2026
Forecast Valid:
11pm PST Feb 13, 2026-6pm PST Feb 20, 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