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

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Current conditions at

Ontario Municipal Airport (KONO)

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

Overcast

41°F

5°C

Humidity 80%
Wind Speed N 0 MPH
Barometer 30.22 in (1023.37 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Last update 07 Dec 12:20 PM MST
Extended Forecast for

Ontario Municipal OR

  • This Afternoon

    This Afternoon: A 50 percent chance of rain. Cloudy, with a high near 45. Light northeast wind.

    High: 45 °F

    Chance Rain

  • Tonight

    Tonight: A 40 percent chance of rain before 11pm. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 34. Light and variable wind.

    Low: 34 °F

    Chance Rain
    and Patchy
    Fog then
    Patchy Fog

  • Monday

    Monday: A 30 percent chance of rain, mainly after 11am. Areas of fog before 2pm. Otherwise, cloudy, with a high near 48. Calm wind.

    High: 48 °F

    Chance Rain
    and Areas Fog

  • Monday Night

    Monday Night: A 40 percent chance of rain. Cloudy, with a low around 43. Calm wind becoming south southeast 5 to 7 mph in the evening.

    Low: 43 °F

    Chance Rain

  • Tuesday

    Tuesday: Rain likely, mainly after 11am. Cloudy, with a high near 51. Southwest wind 5 to 7 mph. Chance of precipitation is 60%.

    High: 51 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: Rain likely, mainly before 11pm. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.

    Low: 44 °F

    Rain Likely

  • Wednesday

    Wednesday: Rain likely. Cloudy, with a high near 59. Chance of precipitation is 70%.

    High: 59 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 11pm. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Rain Likely

  • Thursday

    Thursday: A 30 percent chance of rain, mainly before 11am. Mostly cloudy, with a high near 54.

    High: 54 °F

    Chance Rain

Detailed Forecast

This Afternoon
A 50 percent chance of rain. Cloudy, with a high near 45. Light northeast wind.
Tonight
A 40 percent chance of rain before 11pm. Patchy fog after 8pm. Otherwise, mostly cloudy, with a low around 34. Light and variable wind.
Monday
A 30 percent chance of rain, mainly after 11am. Areas of fog before 2pm. Otherwise, cloudy, with a high near 48. Calm wind.
Monday Night
A 40 percent chance of rain. Cloudy, with a low around 43. Calm wind becoming south southeast 5 to 7 mph in the evening.
Tuesday
Rain likely, mainly after 11am. Cloudy, with a high near 51. Southwest wind 5 to 7 mph. Chance of precipitation is 60%.
Tuesday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Wednesday
Rain likely. Cloudy, with a high near 59. Chance of precipitation is 70%.
Wednesday Night
Rain likely, mainly after 11pm. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Thursday
A 30 percent chance of rain, mainly before 11am. Mostly cloudy, with a high near 54.
Thursday Night
Mostly cloudy, with a low around 36.
Friday
Patchy fog. Otherwise, partly sunny, with a high near 50.
Friday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 34.
Saturday
Partly sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Ontario Municipal OR
 44.03°N 117°W (Elev. 2139 ft)
Last Update:
4:47 am MST Dec 7, 2025
Forecast Valid:
12pm MST Dec 7, 2025-6pm MST Dec 13, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation