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

Hazardous Weather Conditions

Current conditions at

Portland-Hillsboro Airport (KHIO)

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

Mist

35°F

2°C

Humidity 100%
Wind Speed WNW 3 MPH
Barometer 30.24 in (1024.04 mb)
Dewpoint 35°F (2°C)
Visibility 4.00 mi
Last update 16 Apr 07:24 AM PDT
Extended Forecast for

4 Miles E North Plains OR

Frost Advisory until April 16, 09:00am
Click here for hazard details and duration
...
  •  
    Frost Advisory until April 16, 09:00am

    NOW until 9:00am Thu

    Frost Advisory

  • Today

    High: 57 °F

    Patchy Frost
    and Patchy
    Fog then
    Partly Sunny

  • Tonight

    Tonight: Patchy frost after 3am. Otherwise, partly cloudy, with a low around 35. West northwest wind around 6 mph becoming calm in the evening.

    Low: 35 °F

    Mostly Clear
    then Patchy
    Frost

  • Friday

    Friday: Areas of frost before 8am. Otherwise, mostly sunny, with a high near 61. Calm wind.

    High: 61 °F

    Areas Frost
    then Mostly
    Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 68. Light and variable wind.

    High: 68 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 30 percent chance of showers. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers. Mostly cloudy, with a high near 69.

    High: 69 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A chance of rain, mainly before 11pm. Mostly cloudy, with a low around 49.

    Low: 49 °F

    Chance Rain

Detailed Forecast

Today
Patchy fog before 9am. Patchy frost before 9am. Otherwise, mostly sunny, with a high near 57. Calm wind becoming west around 6 mph in the afternoon.
Tonight
Patchy frost after 3am. Otherwise, partly cloudy, with a low around 35. West northwest wind around 6 mph becoming calm in the evening.
Friday
Areas of frost before 8am. Otherwise, mostly sunny, with a high near 61. Calm wind.
Friday Night
Mostly cloudy, with a low around 40. Calm wind.
Saturday
Partly sunny, with a high near 68. Light and variable wind.
Saturday Night
A 30 percent chance of showers. Mostly cloudy, with a low around 49.
Sunday
A 40 percent chance of showers. Mostly cloudy, with a high near 69.
Sunday Night
A chance of rain, mainly before 11pm. Mostly cloudy, with a low around 49.
Monday
A chance of rain, mainly after 11am. Mostly cloudy, with a high near 68.
Monday Night
A chance of rain. Mostly cloudy, with a low around 48.
Tuesday
A chance of rain. Mostly cloudy, with a high near 62.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 47.
Wednesday
A chance of rain. Mostly cloudy, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles E North Plains OR
 45.6°N 122.91°W (Elev. 397 ft)
Last Update:
6:41 am PDT Apr 16, 2026
Forecast Valid:
7am PDT Apr 16, 2026-6pm PDT Apr 22, 2026
 
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