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.

Mostly Cloudy

57°F

14°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.09 in (1018.96 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 01 Jan 07:35 PM PST
Extended Forecast for

Ontario CA

Flood Watch January 1, 07:50pm until January 1, 10:00pm
Click here for hazard details and duration
...
  •  
    Flood Watch January 1, 07:50pm until January 1, 10:00pm

    NOW until 10:00pm Thu

    Flood Watch

  • Tonight

    Low: 50 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 66. Calm wind.

    High: 66 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers after 10pm. Mostly cloudy, with a low around 54. West wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 54 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: Showers likely, mainly after 4pm. Cloudy, with a high near 64. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 64 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers likely, mainly before 10pm. Mostly cloudy, with a low around 54. South wind around 5 mph becoming calm. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 54 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 4pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.

    High: 63 °F

    Heavy Rain

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.

    Low: 51 °F

    Heavy Rain

  • Monday

    Monday: A chance of showers. Mostly cloudy, with a high near 62.

    High: 62 °F

    Chance
    Showers

Detailed Forecast

Tonight
A slight chance of showers before 10pm. Partly cloudy, with a low around 50. Calm wind. Chance of precipitation is 20%.
Friday
Mostly sunny, with a high near 66. Calm wind.
Friday Night
A slight chance of showers after 10pm. Mostly cloudy, with a low around 54. West wind around 5 mph becoming calm. Chance of precipitation is 20%.
Saturday
Showers likely, mainly after 4pm. Cloudy, with a high near 64. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Showers likely, mainly before 10pm. Mostly cloudy, with a low around 54. South wind around 5 mph becoming calm. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Showers likely, with thunderstorms also possible after 4pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 63. Chance of precipitation is 60%.
Sunday Night
Showers likely and possibly a thunderstorm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 51. Chance of precipitation is 70%.
Monday
A chance of showers. Mostly cloudy, with a high near 62.
Monday Night
A chance of showers. Mostly cloudy, with a low around 48.
Tuesday
A chance of showers. Mostly cloudy, with a high near 62.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 45.
Wednesday
A chance of showers. Mostly sunny, with a high near 61.
Wednesday Night
A chance of showers. Partly cloudy, with a low around 44.
Thursday
A slight chance of showers. Mostly sunny, with a high near 60.
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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:
1:03 pm PST Jan 1, 2026
Forecast Valid:
7pm PST Jan 1, 2026-6pm PST Jan 8, 2026
 
Forecast Discussion
 
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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