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, Portland International Airport (KPDX)

Lat: 45.59578°NLon: 122.60917°WElev: 20.0ft.

Fog

39°F

4°C

Humidity 100%
Wind Speed N 0 MPH
Barometer 29.54 in (1000.34 mb)
Dewpoint 39°F (4°C)
Visibility 0.13 mi
Last update 25 Dec 12:30 AM PST
Extended Forecast for

Portland International Airport OR

  • Overnight

    Overnight: A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 40. East northeast wind 7 to 10 mph.

    Low: 40 °F

    Chance Rain

  • Christmas Day

    Christmas Day: Rain likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 52. East wind 8 to 11 mph. Chance of precipitation is 70%.

    High: 52 °F

    Rain Likely
    then Chance
    Rain

  • Thursday Night

    Thursday Night: A chance of rain before 9pm, then a chance of rain after 10pm. Mostly cloudy, with a low around 40. East wind around 7 mph. Chance of precipitation is 50%.

    Low: 40 °F

    Chance Rain

  • Friday

    Friday: Showers. High near 47. Southeast wind 7 to 11 mph becoming west southwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 47 °F

    Showers

  • Friday Night

    Friday Night: Showers, mainly before 4am. Snow level 1700 feet. Low around 38. West southwest wind around 10 mph. Chance of precipitation is 80%.

    Low: 38 °F

    Showers

  • Saturday

    Saturday: A 20 percent chance of showers before 10am. Snow level 1300 feet rising to 1800 feet in the afternoon. Mostly cloudy, with a high near 46.

    High: 46 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Saturday Night

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

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 45.

    High: 45 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Overnight
A 30 percent chance of rain, mainly after 5am. Mostly cloudy, with a low around 40. East northeast wind 7 to 10 mph.
Christmas Day
Rain likely, mainly between 8am and 2pm. Mostly cloudy, with a high near 52. East wind 8 to 11 mph. Chance of precipitation is 70%.
Thursday Night
A chance of rain before 9pm, then a chance of rain after 10pm. Mostly cloudy, with a low around 40. East wind around 7 mph. Chance of precipitation is 50%.
Friday
Showers. High near 47. Southeast wind 7 to 11 mph becoming west southwest in the afternoon. Winds could gust as high as 18 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers, mainly before 4am. Snow level 1700 feet. Low around 38. West southwest wind around 10 mph. Chance of precipitation is 80%.
Saturday
A 20 percent chance of showers before 10am. Snow level 1300 feet rising to 1800 feet in the afternoon. Mostly cloudy, with a high near 46.
Saturday Night
Mostly cloudy, with a low around 35.
Sunday
Mostly cloudy, with a high near 45.
Sunday Night
Mostly cloudy, with a low around 34.
Monday
Partly sunny, with a high near 47.
Monday Night
Partly cloudy, with a low around 34.
Tuesday
Partly sunny, with a high near 48.
Tuesday Night
Partly cloudy, with a low around 34.
Wednesday
A slight chance of showers. Partly sunny, with a high near 48.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Portland International Airport OR
 45.6°N 122.6°W (Elev. 200 ft)
Last Update:
12:41 am PST Dec 25, 2025
Forecast Valid:
12am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation