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

Early Heat Wave in the West; Fire Concerns in the 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. Elevated to critical fire weather conditions are expected today across the High Plains and southern Plains. Lake effect snow downwind of the Great Lakes will taper off today. Read More >

Current conditions at

Portland-Hillsboro Airport (KHIO)

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

Overcast

50°F

10°C

Humidity 82%
Wind Speed N 0 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Last update 17 Mar 09:53 AM PDT
Extended Forecast for

Hillsboro OR

  • Today

    Today: Rain likely before 4pm, then a chance of rain after 5pm. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 59. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 59 °F

    Rain Likely
    and Patchy
    Fog

  • Tonight

    Tonight: A 20 percent chance of rain between 11pm and midnight. Patchy fog after 11pm. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 45. Calm wind.

    Low: 45 °F

    Slight Chance
    Rain and
    Patchy Fog
    then Patchy
    Fog

  • Wednesday

    Wednesday: A 40 percent chance of rain. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 64. Calm wind.

    High: 64 °F

    Chance Rain
    and Patchy
    Fog

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 49. Calm wind.

    Low: 49 °F

    Chance Rain

  • Thursday

    Thursday: A 30 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 66. Light south wind.

    High: 66 °F

    Chance Rain

  • Thursday Night

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

    Low: 50 °F

    Chance Rain

  • Friday

    Friday: Rain likely. Mostly cloudy, with a high near 63. Chance of precipitation is 70%.

    High: 63 °F

    Rain Likely

  • Friday Night

    Friday Night: A chance of rain. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain, mainly before 11am. Partly sunny, with a high near 57.

    High: 57 °F

    Chance Rain

Detailed Forecast

Today
Rain likely before 4pm, then a chance of rain after 5pm. Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 59. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A 20 percent chance of rain between 11pm and midnight. Patchy fog after 11pm. Otherwise, cloudy, then gradually becoming partly cloudy, with a low around 45. Calm wind.
Wednesday
A 40 percent chance of rain. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 64. Calm wind.
Wednesday Night
A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 49. Calm wind.
Thursday
A 30 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 66. Light south wind.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 50.
Friday
Rain likely. Mostly cloudy, with a high near 63. Chance of precipitation is 70%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 43.
Saturday
A chance of rain, mainly before 11am. Partly sunny, with a high near 57.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
A slight chance of rain. Snow level 2100 feet rising to 3300 feet in the afternoon. Partly sunny, with a high near 57.
Sunday Night
A slight chance of rain. Mostly cloudy, with a low around 36.
Monday
A chance of rain. Mostly cloudy, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hillsboro OR
 45.53°N 122.92°W (Elev. 200 ft)
Last Update:
9:42 am PDT Mar 17, 2026
Forecast Valid:
10am PDT Mar 17, 2026-6pm PDT Mar 23, 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