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.

Clear

55°F

13°C

Humidity 43%
Wind Speed NE 3 MPH
Barometer 30.08 in (1018.63 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Last update 09 Feb 03:20 AM PST
Extended Forecast for

Ontario International Arpt CA

  • Overnight

    Overnight: Clear, with a low around 52. East wind around 5 mph.

    Low: 52 °F

    Clear

  • Monday

    Monday: Mostly sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.

    High: 80 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 52. Northwest wind around 5 mph becoming calm in the evening.

    Low: 52 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: A chance of showers after 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 69. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Patchy Fog
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly after 10pm. Mostly cloudy, with a low around 52. West wind 5 to 10 mph becoming east after midnight. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 52 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers, mainly before 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 63. Chance of precipitation is 50%.

    High: 63 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A slight chance of showers before 10pm. Partly cloudy, with a low around 45. Chance of precipitation is 20%.

    Low: 45 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: A slight chance of showers after 4pm. Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Thursday Night

    Thursday Night: A slight chance of showers before 10pm. Partly cloudy, with a low around 46.

    Low: 46 °F

    Slight Chance
    Showers then
    Partly Cloudy

Detailed Forecast

Overnight
Clear, with a low around 52. East wind around 5 mph.
Monday
Mostly sunny, with a high near 80. Calm wind becoming southwest around 5 mph in the afternoon.
Monday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 52. Northwest wind around 5 mph becoming calm in the evening.
Tuesday
A chance of showers after 4pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 69. Light and variable wind becoming southwest 10 to 15 mph in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Showers likely, mainly after 10pm. Mostly cloudy, with a low around 52. West wind 5 to 10 mph becoming east after midnight. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
A chance of showers, mainly before 4pm. Cloudy, then gradually becoming mostly sunny, with a high near 63. Chance of precipitation is 50%.
Wednesday Night
A slight chance of showers before 10pm. Partly cloudy, with a low around 45. Chance of precipitation is 20%.
Thursday
A slight chance of showers after 4pm. Mostly sunny, with a high near 66.
Thursday Night
A slight chance of showers before 10pm. Partly cloudy, with a low around 46.
Friday
Sunny, with a high near 69.
Friday Night
Mostly clear, with a low around 45.
Saturday
Mostly sunny, with a high near 69.
Saturday Night
A slight chance of showers. Mostly cloudy, with a low around 46.
Sunday
Showers likely. Mostly cloudy, with a high near 63.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario International Arpt CA
 34.06°N 117.58°W (Elev. 906 ft)
Last Update:
2:14 am PST Feb 9, 2026
Forecast Valid:
3am PST Feb 9, 2026-6pm PST Feb 15, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation