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Hazardous Weather Conditions

Current conditions at

Portland-Hillsboro Airport (KHIO)

Lat: 45.54765°NLon: 122.95568°WElev: 194.0ft.

Clear

30°F

-1°C

Humidity 100%
Wind Speed WNW 5 MPH
Barometer 30.34 in (1027.43 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill25°F (-4°C)
Last update 18 Jan 11:30 PM PST
Extended Forecast for

Cedar Hills OR

Air Stagnation Advisory January 18, 11:50pm until January 21, 04:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory January 18, 11:50pm until January 21, 04:00pm

    NOW until 4:00pm Wed

    Air Stagnation Advisory

  • Tonight

    Low: 39 °F

    Clear

  • M.L.King Day

    M.L.King Day: Areas of frost before 7am. Otherwise, sunny, with a high near 51. East northeast wind around 6 mph.

    High: 51 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32. Light northeast wind.

    Low: 32 °F

    Mostly Clear
    then Frost

  • Tuesday

    Tuesday: Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 51. Calm wind becoming northeast around 5 mph in the afternoon.

    High: 51 °F

    Frost then
    Sunny

  • Tuesday Night

    Tuesday Night: Areas of frost after midnight. Otherwise, partly cloudy, with a low around 34. Light northeast wind.

    Low: 34 °F

    Partly Cloudy
    then Areas
    Frost

  • Wednesday

    Wednesday: Widespread frost, mainly before 8am. Otherwise, partly sunny, with a high near 49.

    High: 49 °F

    Frost then
    Partly Sunny

  • Wednesday Night

    Wednesday Night: Widespread frost, mainly after 3am. Otherwise, mostly cloudy, with a low around 33.

    Low: 33 °F

    Frost

  • Thursday

    Thursday: Widespread frost before 7am. Otherwise, partly sunny, with a high near 47.

    High: 47 °F

    Frost then
    Partly Sunny

Detailed Forecast

Tonight
Clear, with a steady temperature around 39. East northeast wind around 6 mph.
M.L.King Day
Areas of frost before 7am. Otherwise, sunny, with a high near 51. East northeast wind around 6 mph.
Monday Night
Widespread frost, mainly after 4am. Otherwise, mostly clear, with a low around 32. Light northeast wind.
Tuesday
Widespread frost, mainly before 8am. Otherwise, sunny, with a high near 51. Calm wind becoming northeast around 5 mph in the afternoon.
Tuesday Night
Areas of frost after midnight. Otherwise, partly cloudy, with a low around 34. Light northeast wind.
Wednesday
Widespread frost, mainly before 8am. Otherwise, partly sunny, with a high near 49.
Wednesday Night
Widespread frost, mainly after 3am. Otherwise, mostly cloudy, with a low around 33.
Thursday
Widespread frost before 7am. Otherwise, partly sunny, with a high near 47.
Thursday Night
A slight chance of rain after 10pm. Mostly cloudy, with a low around 36.
Friday
A chance of rain. Mostly cloudy, with a high near 48.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 37.
Saturday
A chance of rain and snow. Partly sunny, with a high near 48.
Saturday Night
A chance of rain and snow. Mostly cloudy, with a low around 38.
Sunday
A chance of rain and snow. Mostly cloudy, with a high near 49.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Cedar Hills OR
 45.49°N 122.78°W (Elev. 364 ft)
Last Update:
11:41 pm PST Jan 18, 2026
Forecast Valid:
11pm PST Jan 18, 2026-6pm PST Jan 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation