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.

Rain

50°F

10°C

Humidity 81%
Wind Speed SSW 6 MPH
Barometer 29.6 in (1002.37 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill48°F (9°C)
Last update 24 Dec 02:20 PM PST
Extended Forecast for

Hillsboro OR

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 50. South southwest wind 8 to 10 mph.

    High: 50 °F

    Partly Sunny

  • Tonight

    Tonight: A 10 percent chance of rain after 4am. Increasing clouds, with a low around 37. Calm wind becoming north northeast around 6 mph after midnight.

    Low: 37 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Christmas Day

    Christmas Day: Rain likely, mainly before 11am. Mostly cloudy, with a high near 52. East northeast wind around 6 mph. Chance of precipitation is 70%.

    High: 52 °F

    Rain Likely
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A 50 percent chance of rain, mainly after 10pm. Increasing clouds, with a low around 38. East northeast wind around 5 mph.

    Low: 38 °F

    Chance Rain

  • Friday

    Friday: Showers. High near 47. South southeast wind 5 to 9 mph becoming west in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.

    High: 47 °F

    Showers

  • Friday Night

    Friday Night: Showers likely, mainly before 10pm. Snow level 1800 feet. Mostly cloudy, with a low around 35. Chance of precipitation is 70%.

    Low: 35 °F

    Showers
    Likely

  • Saturday

    Saturday: A 20 percent chance of showers before 10am. Snow level 1600 feet. Mostly cloudy, with a high near 45.

    High: 45 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 44.

    High: 44 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Partly sunny, with a high near 50. South southwest wind 8 to 10 mph.
Tonight
A 10 percent chance of rain after 4am. Increasing clouds, with a low around 37. Calm wind becoming north northeast around 6 mph after midnight.
Christmas Day
Rain likely, mainly before 11am. Mostly cloudy, with a high near 52. East northeast wind around 6 mph. Chance of precipitation is 70%.
Thursday Night
A 50 percent chance of rain, mainly after 10pm. Increasing clouds, with a low around 38. East northeast wind around 5 mph.
Friday
Showers. High near 47. South southeast wind 5 to 9 mph becoming west in the afternoon. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Showers likely, mainly before 10pm. Snow level 1800 feet. Mostly cloudy, with a low around 35. Chance of precipitation is 70%.
Saturday
A 20 percent chance of showers before 10am. Snow level 1600 feet. Mostly cloudy, with a high near 45.
Saturday Night
Mostly cloudy, with a low around 32.
Sunday
Mostly cloudy, with a high near 44.
Sunday Night
Mostly cloudy, with a low around 31.
Monday
Partly sunny, with a high near 46.
Monday Night
Partly cloudy, with a low around 31.
Tuesday
Partly sunny, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hillsboro OR
 45.55°N 122.96°W (Elev. 194 ft)
Last Update:
2:45 pm PST Dec 24, 2025
Forecast Valid:
2pm PST Dec 24, 2025-6pm PST Dec 30, 2025
 
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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