National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Ontario Municipal Airport (KONO)

Lat: 44.01424°NLon: 117.00808°WElev: 2185.0ft.

Clear

27°F

-3°C

Humidity 92%
Wind Speed N 0 MPH
Barometer 30.68 in (1038.94 mb)
Dewpoint 25°F (-4°C)
Visibility 10.00 mi
Last update 29 Dec 04:35 AM MST
Extended Forecast for

Ontario ORSimilar City Names

Air Stagnation Advisory December 29, 04:52am until January 1, 10:00am
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory December 29, 04:52am until January 1, 10:00am

    NOW until 10:00am Thu

    Air Stagnation Advisory

  • Today

    High: 37 °F

    Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 23. Calm wind.

    Low: 23 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, then gradually becoming sunny, with a high near 38. Calm wind.

    High: 38 °F

    Becoming
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 21. Calm wind.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 38. Calm wind.

    High: 38 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 25.

    Low: 25 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: A chance of rain and snow before 2pm, then a chance of rain. Mostly cloudy, with a high near 40. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 40 °F

    Chance
    Rain/Snow

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 30.

    Low: 30 °F

    Chance Rain
    and Patchy
    Fog

Detailed Forecast

Today
Sunny, with a high near 37. Calm wind.
Tonight
Partly cloudy, with a low around 23. Calm wind.
Tuesday
Partly sunny, then gradually becoming sunny, with a high near 38. Calm wind.
Tuesday Night
Mostly clear, with a low around 21. Calm wind.
Wednesday
Partly sunny, with a high near 38. Calm wind.
Wednesday Night
Mostly cloudy, with a low around 25.
New Year's Day
A chance of rain and snow before 2pm, then a chance of rain. Mostly cloudy, with a high near 40. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday Night
A 50 percent chance of rain. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 30.
Friday
A 50 percent chance of rain. Patchy fog before 2pm. Otherwise, mostly cloudy, with a high near 42.
Friday Night
A 40 percent chance of rain. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 32.
Saturday
A 40 percent chance of rain. Patchy fog. Otherwise, mostly cloudy, with a high near 45.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 33.
Sunday
A 30 percent chance of rain. Partly sunny, with a high near 46.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario ORSimilar City Names
 44.03°N 116.97°W (Elev. 2103 ft)
Last Update:
2:04 am MST Dec 29, 2025
Forecast Valid:
4am MST Dec 29, 2025-6pm MST Jan 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation