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.

Overcast

61°F

16°C

Humidity 87%
Wind Speed SW 10 MPH
Barometer 30.05 in (1017.61 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 01 Jan 01:35 PM PST
Extended Forecast for

Ontario CA

Flood Watch January 1, 01:53pm until January 1, 10:00pm
Click here for hazard details and duration
Flood Watch
  •  
    Flood Watch January 1, 01:53pm until January 1, 10:00pm

    NOW until 10:00pm Thu

    Flood Watch

  • New Year's Day

    High: 63 °F

    Showers
    Likely

  • Tonight

    Tonight: A slight chance of showers before 10pm. Partly cloudy, with a low around 50. Calm wind. Chance of precipitation is 20%.

    Low: 50 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 66. Calm wind becoming northeast around 5 mph.

    High: 66 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A slight chance of showers after 10pm. Mostly cloudy, with a low around 54. Calm wind becoming east around 5 mph. 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. Chance of precipitation is 70%.

    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 62. Chance of precipitation is 60%.

    High: 62 °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.

    Low: 51 °F

    Heavy Rain

Detailed Forecast

New Year's Day
Showers likely, mainly before 4pm. Partly sunny, with a high near 63. West wind around 5 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
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 becoming northeast around 5 mph.
Friday Night
A slight chance of showers after 10pm. Mostly cloudy, with a low around 54. Calm wind becoming east around 5 mph. 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. Chance of precipitation is 70%.
Sunday
Showers likely, with thunderstorms also possible after 4pm. Some of the storms could produce heavy rainfall. Mostly cloudy, with a high near 62. 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.
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 61.
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.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.05°N 117.64°W (Elev. 919 ft)
Last Update:
1:03 pm PST Jan 1, 2026
Forecast Valid:
1pm PST Jan 1, 2026-6pm PST Jan 7, 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