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.

light rain,mist

59°F

15°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.04 in (1017.27 mb)
Dewpoint 57°F (14°C)
Visibility 4.00 mi
Last update 01 Jan 08:53 AM PST
Extended Forecast for

Ontario CA

Flood Watch January 1, 09:02am until January 1, 10:00pm
Flood Advisory until January 1, 09:03am
Click here for hazard details and duration
Flood Watch
...
  •  
    Flood Watch January 1, 09:02am until January 1, 10:00pm
    Flood Advisory until January 1, 09:03am

    NOW: Multiple hazards in effect

    Click HERE for Details

  • New Year's Day

    High: 63 °F

    Showers

  • Tonight

    Tonight: A slight chance of showers before 10pm. Mostly cloudy, with a low around 51. Calm wind. Chance of precipitation is 20%.

    Low: 51 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 65. Calm wind becoming northeast around 5 mph.

    High: 65 °F

    Partly Sunny

  • Friday Night

    Friday Night: A slight chance of showers after 10pm. Mostly cloudy, with a low around 53. West wind around 5 mph becoming calm. Chance of precipitation is 20%.

    Low: 53 °F

    Slight Chance
    Showers

  • Saturday

    Saturday: A chance of showers. Cloudy, with a high near 65. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 65 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.

    Low: 53 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 63. Chance of precipitation is 70%.

    High: 63 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Showers
    Likely

Detailed Forecast

New Year's Day
Showers and possibly a thunderstorm. High near 63. Southeast wind around 5 mph becoming west in the morning. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Tonight
A slight chance of showers before 10pm. Mostly cloudy, with a low around 51. Calm wind. Chance of precipitation is 20%.
Friday
Partly sunny, with a high near 65. Calm wind becoming northeast around 5 mph.
Friday Night
A slight chance of showers after 10pm. Mostly cloudy, with a low around 53. West wind around 5 mph becoming calm. Chance of precipitation is 20%.
Saturday
A chance of showers. Cloudy, with a high near 65. Calm wind becoming south around 5 mph in the afternoon. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Showers likely. Mostly cloudy, with a low around 53. Chance of precipitation is 70%.
Sunday
Showers likely, with thunderstorms also possible after 10am. Mostly cloudy, with a high near 63. Chance of precipitation is 70%.
Sunday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 51.
Monday
A chance of showers. Mostly cloudy, with a high near 63.
Monday Night
A chance of showers. Mostly cloudy, with a low around 49.
Tuesday
A chance of showers. Mostly cloudy, with a high near 63.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 46.
Wednesday
A chance of showers. Partly sunny, with a high near 62.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.05°N 117.61°W (Elev. 902 ft)
Last Update:
8:01 am PST Jan 1, 2026
Forecast Valid:
9am PST Jan 1, 2026-6pm PST Jan 7, 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