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

Portland-Hillsboro Airport (KHIO)

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

Overcast

6°C

43°F

Humidity 93%
Wind Speed W 3 MPH
Barometer 30.14 in (1020.66 mb)
Dewpoint 5°C (41°F)
Visibility 16 km
Last update 18 Nov 08:30 PM PST
Extended Forecast for

Hillsboro OR

  • Tonight

    Tonight: Patchy dense fog before 10pm, then patchy dense fog after 11pm. Patchy frost after 2am. Otherwise, partly cloudy, with a low around 1. Calm wind.

    Low: 1 °C

    Patchy Fog
    then Patchy
    Frost and
    Patchy Dense
    Fog

  • Wednesday

    Wednesday: A 30 percent chance of rain after 4pm. Patchy dense fog before 8am. Areas of frost before 9am. Otherwise, mostly sunny, with a high near 12. East wind 3 to 8 km/h.

    High: 12 °C

    Areas Frost
    and Patchy
    Dense Fog
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: Rain likely, mainly after 10pm. Cloudy, with a low around 4. East wind 5 to 8 km/h. Chance of precipitation is 70%. New precipitation amounts between 2.5 and 5 mm possible.

    Low: 4 °C

    Rain Likely

  • Thursday

    Thursday: A 50 percent chance of rain. Cloudy, then gradually becoming mostly sunny, with a high near 12. Calm wind.

    High: 12 °C

    Chance Rain

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 3. Calm wind.

    Low: 3 °C

    Mostly Cloudy

  • Friday

    Friday: A 20 percent chance of showers after 10am. Mostly cloudy, with a high near 11.

    High: 11 °C

    Slight Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 5.

    Low: 5 °C

    Chance Rain

  • Saturday

    Saturday: A chance of rain. Mostly cloudy, with a high near 12.

    High: 12 °C

    Chance Rain

  • Saturday Night

    Saturday Night: A chance of rain. Mostly cloudy, with a low around 7.

    Low: 7 °C

    Chance Rain

Detailed Forecast

Tonight
Patchy dense fog before 10pm, then patchy dense fog after 11pm. Patchy frost after 2am. Otherwise, partly cloudy, with a low around 1. Calm wind.
Wednesday
A 30 percent chance of rain after 4pm. Patchy dense fog before 8am. Areas of frost before 9am. Otherwise, mostly sunny, with a high near 12. East wind 3 to 8 km/h.
Wednesday Night
Rain likely, mainly after 10pm. Cloudy, with a low around 4. East wind 5 to 8 km/h. Chance of precipitation is 70%. New precipitation amounts between 2.5 and 5 mm possible.
Thursday
A 50 percent chance of rain. Cloudy, then gradually becoming mostly sunny, with a high near 12. Calm wind.
Thursday Night
Mostly cloudy, with a low around 3. Calm wind.
Friday
A 20 percent chance of showers after 10am. Mostly cloudy, with a high near 11.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 5.
Saturday
A chance of rain. Mostly cloudy, with a high near 12.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 7.
Sunday
Rain likely, mainly after 4pm. Cloudy, with a high near 13.
Sunday Night
Rain. Mostly cloudy, with a low around 6.
Monday
Showers. Mostly cloudy, with a high near 12.
Monday Night
Showers likely. Mostly cloudy, with a low around 2.
Tuesday
A chance of showers. Partly sunny, with a high near 10.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hillsboro OR
 45.55°N 122.96°W (Elev. 194 m)
Last Update:
8:41 pm PST Nov 18, 2025
Forecast Valid:
8pm PST Nov 18, 2025-6pm PST Nov 25, 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