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

28°F

-2°C

Humidity 79%
Wind Speed N 0 MPH
Barometer 30.68 in (1038.94 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 28 Dec 11:05 PM MST
Extended Forecast for

Ontario ORSimilar City Names

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

    NOW until 10:00am Thu

    Air Stagnation Advisory

  • Tonight

    Low: 21 °F

    Mostly Clear

  • Monday

    Monday: Mostly sunny, with a high near 38. Calm wind.

    High: 38 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 20. Calm wind.

    Low: 20 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 38. Calm wind.

    High: 38 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 19. Calm wind.

    Low: 19 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 24.

    Low: 24 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: A slight chance of rain and snow after 11am. Mostly cloudy, with a high near 38. Chance of precipitation is 20%.

    High: 38 °F

    Slight Chance
    Rain/Snow

Detailed Forecast

Tonight
Mostly clear, with a low around 21. Calm wind.
Monday
Mostly sunny, with a high near 38. Calm wind.
Monday Night
Mostly clear, with a low around 20. Calm wind.
Tuesday
Sunny, with a high near 38. Calm wind.
Tuesday Night
Mostly clear, with a low around 19. Calm wind.
Wednesday
Mostly sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 24.
New Year's Day
A slight chance of rain and snow after 11am. Mostly cloudy, with a high near 38. Chance of precipitation is 20%.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 29.
Friday
A 50 percent chance of rain. Patchy fog before 2pm. Otherwise, mostly cloudy, with a high near 40.
Friday Night
A 40 percent chance of rain. Patchy fog. Otherwise, mostly cloudy, with a low around 30.
Saturday
A 40 percent chance of rain. Areas of fog. Otherwise, mostly cloudy, with a high near 44.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 30.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 44.
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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 pm MST Dec 28, 2025
Forecast Valid:
11pm MST Dec 28, 2025-6pm MST Jan 4, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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