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.

Mostly Cloudy

62°F

17°C

Humidity 74%
Wind Speed WSW 4 MPH
Barometer 29.94 in (1013.89 mb)
Dewpoint 54°F (12°C)
Visibility 10.00 mi
Last update 09 Apr 01:53 AM PDT
Extended Forecast for

Ontario CA

  • Overnight

    Overnight: Partly cloudy, with a low around 57. West wind around 5 mph becoming calm.

    Low: 57 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 81. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 81 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 57. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 57 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 75. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.

    High: 75 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A chance of showers, mainly after 11pm. Mostly cloudy, with a low around 57. West wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 57 °F

    Chance
    Showers

  • Saturday

    Saturday: A slight chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 20%.

    High: 68 °F

    Slight Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after 11pm. Increasing clouds, with a low around 55. Chance of precipitation is 70%.

    Low: 55 °F

    Showers
    Likely

  • Sunday

    Sunday: Showers likely, with thunderstorms also possible after 11am. Partly sunny, with a high near 63.

    High: 63 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A slight chance of showers. Partly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    Showers

Detailed Forecast

Overnight
Partly cloudy, with a low around 57. West wind around 5 mph becoming calm.
Thursday
Mostly sunny, with a high near 81. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Thursday Night
Partly cloudy, with a low around 57. West wind 5 to 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a high near 75. Light southwest wind increasing to 10 to 15 mph in the afternoon. Winds could gust as high as 25 mph.
Friday Night
A chance of showers, mainly after 11pm. Mostly cloudy, with a low around 57. West wind 5 to 15 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A slight chance of showers. Partly sunny, with a high near 68. Chance of precipitation is 20%.
Saturday Night
Showers likely, mainly after 11pm. Increasing clouds, with a low around 55. Chance of precipitation is 70%.
Sunday
Showers likely, with thunderstorms also possible after 11am. Partly sunny, with a high near 63.
Sunday Night
A slight chance of showers. Partly cloudy, with a low around 48.
Monday
Mostly sunny, with a high near 67.
Monday Night
Mostly clear, with a low around 47.
Tuesday
Sunny, with a high near 73.
Tuesday Night
Mostly clear, with a low around 51.
Wednesday
Sunny, with a high near 78.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Ontario CA
 34.05°N 117.64°W (Elev. 919 ft)
Last Update:
1:35 am PDT Apr 9, 2026
Forecast Valid:
2am PDT Apr 9, 2026-6pm PDT Apr 15, 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