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.

Rain

48°F

9°C

Humidity 89%
Wind Speed S 16 MPH
Barometer 29.8 in (1009.14 mb)
Dewpoint 45°F (7°C)
Visibility 9.00 mi
Wind Chill42°F (6°C)
Last update 15 Apr 01:39 AM PDT
Extended Forecast for

Hillsboro OR

Frost Advisory April 16, 01:00am until April 16, 09:00am
Click here for hazard details and duration
Frost Advisory

  • Overnight

    Overnight: Rain, mainly before 4am. Snow level 4200 feet lowering to 2000 feet. Low around 39. Southwest wind 6 to 9 mph becoming northwest. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 39 °F

    Rain

  • Wednesday

    Wednesday: Rain and possibly a thunderstorm before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Snow level 1800 feet. High near 52. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 52 °F

    Showers

  • Wednesday Night

    Wednesday Night: Showers and thunderstorms likely, mainly before 10pm. Patchy fog after 2am. Patchy frost after 1am. Snow level 1700 feet. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 34. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.

    Low: 34 °F

    Showers
    Likely then
    Patchy Frost
    and Patchy
    Fog

  • Thursday

    Thursday: A 20 percent chance of showers after 11am. Patchy fog before 9am. Patchy frost before 9am. Snow level 1900 feet rising to 3200 feet in the afternoon. Otherwise, partly sunny, with a high near 56. Light southwest wind.

    High: 56 °F

    Slight Chance
    Showers and
    Patchy Fog

  • Thursday Night

    Thursday Night: Patchy fog after 3am. Otherwise, increasing clouds, with a low around 38. West wind around 5 mph becoming calm in the evening.

    Low: 38 °F

    Partly Cloudy
    then Patchy
    Fog

  • Friday

    Friday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Friday Night

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

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of rain after 11am. Partly sunny, with a high near 67.

    High: 67 °F

    Slight Chance
    Rain

  • Saturday Night

    Saturday Night: A chance of rain. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance Rain

Detailed Forecast

Overnight
Rain, mainly before 4am. Snow level 4200 feet lowering to 2000 feet. Low around 39. Southwest wind 6 to 9 mph becoming northwest. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Rain and possibly a thunderstorm before 3pm, then showers likely and possibly a thunderstorm between 3pm and 4pm, then a chance of showers and thunderstorms after 4pm. Snow level 1800 feet. High near 52. Calm wind becoming west 5 to 9 mph in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 90%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Showers and thunderstorms likely, mainly before 10pm. Patchy fog after 2am. Patchy frost after 1am. Snow level 1700 feet. Otherwise, mostly cloudy, then gradually becoming mostly clear, with a low around 34. West wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%.
Thursday
A 20 percent chance of showers after 11am. Patchy fog before 9am. Patchy frost before 9am. Snow level 1900 feet rising to 3200 feet in the afternoon. Otherwise, partly sunny, with a high near 56. Light southwest wind.
Thursday Night
Patchy fog after 3am. Otherwise, increasing clouds, with a low around 38. West wind around 5 mph becoming calm in the evening.
Friday
Partly sunny, with a high near 60.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
A slight chance of rain after 11am. Partly sunny, with a high near 67.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 48.
Sunday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 68.
Sunday Night
A chance of rain. Mostly cloudy, with a low around 47.
Monday
A chance of rain. Partly sunny, with a high near 72.
Monday Night
A slight chance of rain. Partly cloudy, with a low around 47.
Tuesday
A chance of rain. Partly sunny, with a high near 70.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hillsboro OR
 45.53°N 122.92°W (Elev. 200 ft)
Last Update:
1:41 am PDT Apr 15, 2026
Forecast Valid:
1am PDT Apr 15, 2026-6pm PDT Apr 21, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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