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

Atmospheric River Bringing Heavy Rain to Southern California and Heavy Snow to the Sierra Nevadas

A strong atmospheric river will continue heavy rain over southern California through Friday. The heaviest rainfall is ongoing today in the Los Angeles Basin. Flash and urban flooding is possible. A prolonged heavy snowfall has begun over the Sierra Nevada Mountains and will continue through Friday. Travel will become increasingly difficult over the passes due to snow and strong winds. Read More >

Current conditions at

Portland-Hillsboro Airport (KHIO)

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

Mostly Cloudy

48°F

9°C

Humidity 86%
Wind Speed S 17 MPH
Barometer 29.54 in (1000.34 mb)
Dewpoint 44°F (7°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 24 Dec 11:53 AM PST
Extended Forecast for

4 Miles SE Hillsboro OR

  • This Afternoon

    This Afternoon: A 40 percent chance of rain. Partly sunny, with a temperature falling to around 47 by 5pm. Breezy, with a south southwest wind 13 to 20 mph, with gusts as high as 41 mph.

    High: 53 °F⇓

    Chance Rain
    and Breezy

  • Tonight

    Tonight: A 30 percent chance of rain, mainly after 4am. Increasing clouds, with a low around 40. Light northeast wind.

    Low: 40 °F

    Partly Cloudy
    then Chance
    Rain

  • Christmas Day

    Christmas Day: Rain likely, mainly after 10am. Mostly cloudy, with a high near 52. East wind around 5 mph. Chance of precipitation is 60%.

    High: 52 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 38. Calm wind.

    Low: 38 °F

    Chance Rain

  • Friday

    Friday: Showers likely. Mostly cloudy, with a high near 48. West southwest wind 3 to 6 mph. Chance of precipitation is 70%.

    High: 48 °F

    Showers
    Likely

  • Friday Night

    Friday Night: A 40 percent chance of showers. Patchy fog after 3am. Snow level 2200 feet. Otherwise, mostly cloudy, with a low around 37.

    Low: 37 °F

    Chance
    Showers and
    Patchy Fog

  • Saturday

    Saturday: Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 47.

    High: 47 °F

    Patchy Fog
    then Mostly
    Cloudy

  • Saturday Night

    Saturday Night: Patchy fog before 11pm, then patchy fog after midnight. Otherwise, mostly cloudy, with a low around 34.

    Low: 34 °F

    Patchy Fog

  • Sunday

    Sunday: Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 47.

    High: 47 °F

    Patchy Fog
    then Mostly
    Cloudy

Detailed Forecast

This Afternoon
A 40 percent chance of rain. Partly sunny, with a temperature falling to around 47 by 5pm. Breezy, with a south southwest wind 13 to 20 mph, with gusts as high as 41 mph.
Tonight
A 30 percent chance of rain, mainly after 4am. Increasing clouds, with a low around 40. Light northeast wind.
Christmas Day
Rain likely, mainly after 10am. Mostly cloudy, with a high near 52. East wind around 5 mph. Chance of precipitation is 60%.
Thursday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 38. Calm wind.
Friday
Showers likely. Mostly cloudy, with a high near 48. West southwest wind 3 to 6 mph. Chance of precipitation is 70%.
Friday Night
A 40 percent chance of showers. Patchy fog after 3am. Snow level 2200 feet. Otherwise, mostly cloudy, with a low around 37.
Saturday
Patchy fog before 11am. Otherwise, mostly cloudy, with a high near 47.
Saturday Night
Patchy fog before 11pm, then patchy fog after midnight. Otherwise, mostly cloudy, with a low around 34.
Sunday
Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 47.
Sunday Night
Mostly cloudy, with a low around 33.
Monday
Partly sunny, with a high near 49.
Monday Night
Mostly cloudy, with a low around 34.
Tuesday
Partly sunny, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles SE Hillsboro OR
 45.5°N 122.88°W (Elev. 200 ft)
Last Update:
12:00 pm PST Dec 24, 2025
Forecast Valid:
12pm PST Dec 24, 2025-6pm PST Dec 30, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation