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

Heat Wave Continues in the West; Critical Fire Weather Conditions in the High Plains

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. Read More >

Current conditions at

Portland-Hillsboro Airport (KHIO)

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

Overcast

52°F

11°C

Humidity 81%
Wind Speed N 0 MPH
Barometer 30.09 in (1018.96 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 18 Mar 10:00 AM PDT
Extended Forecast for

5 Miles S Scappoose Industrial Apk (1s4) OR

  • Today

    Today: A 20 percent chance of rain before 4pm. Mostly cloudy, with a high near 66. Calm wind becoming south around 5 mph in the afternoon.

    High: 66 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: A 30 percent chance of rain, mainly between 1am and 3am. Mostly cloudy, with a low around 50. Calm wind.

    Low: 50 °F

    Chance Rain

  • Thursday

    Thursday: A 40 percent chance of rain. Mostly cloudy, with a high near 63. Calm wind becoming south around 5 mph in the afternoon.

    High: 63 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 52. Light south wind.

    Low: 52 °F

    Chance Rain

  • Friday

    Friday: Rain. High near 60. South wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Rain

  • Friday Night

    Friday Night: A 50 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain
    then Slight
    Chance Rain

  • Saturday

    Saturday: A 20 percent chance of rain before 11am. Snow level 1900 feet rising to 2400 feet in the afternoon. Mostly sunny, with a high near 54.

    High: 54 °F

    Slight Chance
    Rain then
    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 35.

    Low: 35 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

Detailed Forecast

Today
A 20 percent chance of rain before 4pm. Mostly cloudy, with a high near 66. Calm wind becoming south around 5 mph in the afternoon.
Tonight
A 30 percent chance of rain, mainly between 1am and 3am. Mostly cloudy, with a low around 50. Calm wind.
Thursday
A 40 percent chance of rain. Mostly cloudy, with a high near 63. Calm wind becoming south around 5 mph in the afternoon.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 52. Light south wind.
Friday
Rain. High near 60. South wind 3 to 6 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A 50 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41.
Saturday
A 20 percent chance of rain before 11am. Snow level 1900 feet rising to 2400 feet in the afternoon. Mostly sunny, with a high near 54.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Sunny, with a high near 56.
Sunday Night
Increasing clouds, with a low around 36.
Monday
A slight chance of rain. Mostly cloudy, with a high near 58.
Monday Night
A chance of rain. Mostly cloudy, with a low around 42.
Tuesday
Rain. Cloudy, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles S Scappoose Industrial Apk (1s4) OR
 45.69°N 122.87°W (Elev. 171 ft)
Last Update:
9:42 am PDT Mar 18, 2026
Forecast Valid:
10am PDT Mar 18, 2026-6pm PDT Mar 24, 2026
 
Forecast Discussion
 
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Additional Resources

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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