National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Ontario International Airport (KONT)

Lat: 34.05316°NLon: 117.57685°WElev: 906.0ft.

Partly Cloudy

64°F

18°C

Humidity 55%
Wind Speed WSW 9 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 25 Dec 03:20 PM PST
Extended Forecast for

Ontario CA

Flood Watch December 26, 12:00am until December 26, 04:00pm
Click here for hazard details and duration
Flood Watch

  • Christmas Day

    Christmas Day: A chance of showers. Partly sunny, with a high near 64. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Chance
    Showers

  • Tonight

    Tonight: Showers likely, mainly after 10pm. Mostly cloudy, with a low around 51. Southwest wind around 5 mph becoming calm. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 51 °F

    Showers
    Likely

  • Friday

    Friday: Showers. The rain could be heavy at times. High near 59. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.

    High: 59 °F

    Heavy Rain

  • Friday Night

    Friday Night: Showers likely, mainly before 10pm. Mostly cloudy, with a low around 47. Southwest wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Showers
    Likely then
    Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 59. Calm wind becoming southwest around 5 mph.

    High: 59 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 41.

    Low: 41 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 64.

    High: 64 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

Christmas Day
A chance of showers. Partly sunny, with a high near 64. Southwest wind around 10 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers likely, mainly after 10pm. Mostly cloudy, with a low around 51. Southwest wind around 5 mph becoming calm. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Showers. The rain could be heavy at times. High near 59. Calm wind becoming southwest around 5 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between three quarters and one inch possible.
Friday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 47. Southwest wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Mostly sunny, with a high near 59. Calm wind becoming southwest around 5 mph.
Saturday Night
Mostly clear, with a low around 41.
Sunday
Sunny, with a high near 64.
Sunday Night
Mostly clear, with a low around 45.
Monday
Sunny, with a high near 66.
Monday Night
Mostly clear, with a low around 46.
Tuesday
Sunny, with a high near 71.
Tuesday Night
A slight chance of showers. Mostly clear, with a low around 47.
Wednesday
A chance of showers. Mostly sunny, with a high near 71.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 48.
New Year's Day
A chance of showers. Partly sunny, with a high near 66.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.03°N 117.61°W (Elev. 823 ft)
Last Update:
12:54 pm PST Dec 25, 2025
Forecast Valid:
3pm PST Dec 25, 2025-6pm PST Jan 1, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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