Prolonged Atmospheric River in the Pacific Northwest; Snow and High Winds from the Upper Midwest into the Northeast

A prolonged atmospheric river will continue to impact the Pacific Northwest into the Northern Rockies with heavy rainfall, areas of urban and river flooding, landslides, heavy mountain snow, and gusty winds into Thursday. A strong clipper system will bring the threat of heavy snow and high winds across the Upper Midwest/Great Lakes as well as portions of the interior Northeast and Appalachians. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

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

Mostly Cloudy

45°F

7°C

Humidity 93%
Wind Speed NNW 4 MPH
Barometer 30.18 in (1022.01 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 09 Dec 09:00 PM MST
Extended Forecast for

Ontario Municipal OR

  • Tonight

    Tonight: Rain likely, mainly before 11pm.  Mostly cloudy, with a low around 42. Calm wind becoming south around 5 mph after midnight.  Chance of precipitation is 60%.

    Low: 42 °F

    Rain Likely

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 58. Light and variable wind.

    High: 58 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 36. Calm wind.

    Low: 36 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 54. Calm wind.

    High: 54 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 35. Calm wind.

    Low: 35 °F

    Partly Cloudy

  • Friday

    Friday: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 53.

    High: 53 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

  • Saturday

    Saturday: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 51.

    High: 51 °F

    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

Detailed Forecast

Tonight
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 42. Calm wind becoming south around 5 mph after midnight. Chance of precipitation is 60%.
Wednesday
Mostly cloudy, with a high near 58. Light and variable wind.
Wednesday Night
Mostly cloudy, with a low around 36. Calm wind.
Thursday
Partly sunny, with a high near 54. Calm wind.
Thursday Night
Partly cloudy, with a low around 35. Calm wind.
Friday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 53.
Friday Night
Partly cloudy, with a low around 31.
Saturday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 51.
Saturday Night
Partly cloudy, with a low around 30.
Sunday
Partly sunny, with a high near 49.
Sunday Night
Mostly cloudy, with a low around 33.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 48.
Monday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 36.
Tuesday
A 40 percent chance of rain. Partly sunny, with a high near 53.
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario Municipal OR
 44.03°N 117°W (Elev. 2139 ft)
2:04 pm MST Dec 9, 2025
9pm MST Dec 9, 2025-6pm MST Dec 16, 2025
 
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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