Prolonged Atmospheric River in the Northwest; Snow in the North-Central US

A prolonged atmospheric river will bring heavy rainfall which may lead to widespread urban and river flooding, heavy mountain snow, along with gusty winds to the Pacific Northwest into the northern Rockies through much of the week. A clipper will bring a period of snow across the upper Midwest and the Great Lakes into Tuesday, before a stronger system bring more wintry impacts. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

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

Overcast

39°F

4°C

Humidity 93%
Wind Speed NE 5 MPH
Barometer 30.1 in (1019.3 mb)
Dewpoint 37°F (3°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 09 Dec 03:05 AM MST
Extended Forecast for

Ontario Municipal OR

  • Overnight

    Overnight: A 50 percent chance of rain.  Cloudy, with a low around 43. South wind around 6 mph.

    Low: 43 °F

    Chance Rain

  • Tuesday

    Tuesday: A 40 percent chance of rain.  Cloudy, with a high near 50. Southwest wind around 6 mph becoming light and variable  in the morning.

    High: 50 °F

    Chance Rain

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain.  Patchy fog between 8pm and 11pm.  Otherwise, mostly cloudy, with a low around 43. Northwest wind around 5 mph becoming south in the evening.

    Low: 43 °F

    Chance Rain
    and Patchy
    Fog

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 59. West southwest wind 3 to 5 mph.

    High: 59 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 37. Southwest wind around 6 mph becoming calm  after midnight.

    Low: 37 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 57.

    High: 57 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Patchy fog after 2am.  Otherwise, partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Patchy fog before 11am.  Otherwise, mostly sunny, with a high near 54.

    High: 54 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Patchy fog after 2am.  Otherwise, partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy
    then Patchy
    Fog

Detailed Forecast

Overnight
A 50 percent chance of rain. Cloudy, with a low around 43. South wind around 6 mph.
Tuesday
A 40 percent chance of rain. Cloudy, with a high near 50. Southwest wind around 6 mph becoming light and variable in the morning.
Tuesday Night
A 30 percent chance of rain. Patchy fog between 8pm and 11pm. Otherwise, mostly cloudy, with a low around 43. Northwest wind around 5 mph becoming south in the evening.
Wednesday
Mostly cloudy, with a high near 59. West southwest wind 3 to 5 mph.
Wednesday Night
Mostly cloudy, with a low around 37. Southwest wind around 6 mph becoming calm after midnight.
Thursday
Partly sunny, with a high near 57.
Thursday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 35.
Friday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 54.
Friday Night
Patchy fog after 2am. Otherwise, partly cloudy, with a low around 32.
Saturday
Patchy fog before 11am. Otherwise, mostly sunny, with a high near 50.
Saturday Night
Mostly cloudy, with a low around 31.
Sunday
Partly sunny, with a high near 48.
Sunday Night
Mostly cloudy, with a low around 33.
Monday
A 30 percent chance of rain. Mostly cloudy, with a high near 50.
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario Municipal OR
 44.03°N 117°W (Elev. 2139 ft)
2:04 am MST Dec 9, 2025
3am MST Dec 9, 2025-6pm MST Dec 15, 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