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

Prolonged Atmospheric River Will Impact the Northwest Early this Week

A weather system in the Pacific Northwest will produce rain throughout the day, before a potent atmospheric river produces a prolonged round of heavy rainfall, widespread urban and river flooding, and high elevation snow to the region Monday through Wednesday. Showers and thunderstorms may produce isolated damaging winds, a brief tornado, and locally heavy rainfall across parts of Florida today. Read More >

Hazardous Weather Conditions

Current conditions at

Lewiston, Lewiston-Nez Perce County Airport (KLWS)

Lat: 46.37472°NLon: 117.01444°WElev: 1437.0ft.

Mostly Cloudy

50°F

10°C

Humidity 65%
Wind Speed S 10 MPH
Barometer 30.09 in (1018.96 mb)
Dewpoint 39°F (4°C)
Visibility 10.00 mi
Wind Chill46°F (8°C)
Last update 07 Dec 07:56 PM PST
Extended Forecast for

Lewiston ID

Wind Advisory December 8, 07:00pm until December 9, 07:00am
Click here for hazard details and duration
Wind Advisory

  • Tonight

    Tonight: A 20 percent chance of rain before 10pm. Increasing clouds, with a low around 45. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 45 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Monday

    Monday: Rain, mainly after 10am. High near 56. East wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 56 °F

    Rain

  • Monday Night

    Monday Night: Rain. Low around 50. Breezy, with a west wind 17 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Rain and
    Breezy

  • Tuesday

    Tuesday: Rain. High near 57. Breezy, with a southwest wind 15 to 20 mph decreasing to 7 to 12 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 57 °F

    Rain and
    Breezy

  • Tuesday Night

    Tuesday Night: Rain. Low around 47. Southeast wind 7 to 10 mph becoming southwest after midnight. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 47 °F

    Rain

  • Wednesday

    Wednesday: Rain. High near 60. Chance of precipitation is 90%.

    High: 60 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain likely. Cloudy, with a low around 50. Chance of precipitation is 70%.

    Low: 50 °F

    Rain Likely

  • Thursday

    Thursday: Rain likely, mainly before 10am. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.

    High: 56 °F

    Rain Likely

  • Thursday Night

    Thursday Night: A 40 percent chance of rain, mainly before 4am. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Chance Rain

Detailed Forecast

Tonight
A 20 percent chance of rain before 10pm. Increasing clouds, with a low around 45. Southwest wind 6 to 10 mph, with gusts as high as 20 mph.
Monday
Rain, mainly after 10am. High near 56. East wind 5 to 10 mph becoming south in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday Night
Rain. Low around 50. Breezy, with a west wind 17 to 22 mph, with gusts as high as 36 mph. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
Rain. High near 57. Breezy, with a southwest wind 15 to 20 mph decreasing to 7 to 12 mph in the afternoon. Winds could gust as high as 31 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Tuesday Night
Rain. Low around 47. Southeast wind 7 to 10 mph becoming southwest after midnight. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Rain. High near 60. Chance of precipitation is 90%.
Wednesday Night
Rain likely. Cloudy, with a low around 50. Chance of precipitation is 70%.
Thursday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 56. Chance of precipitation is 60%.
Thursday Night
A 40 percent chance of rain, mainly before 4am. Mostly cloudy, with a low around 48.
Friday
A 20 percent chance of rain before 10am. Mostly cloudy, with a high near 59.
Friday Night
Mostly cloudy, with a low around 44.
Saturday
A 20 percent chance of rain. Partly sunny, with a high near 57.
Saturday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 44.
Sunday
A 30 percent chance of rain. Mostly cloudy, with a high near 56.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Lewiston ID
 46.43°N 117.01°W (Elev. 784 ft)
Last Update:
2:48 pm PST Dec 7, 2025
Forecast Valid:
8pm PST Dec 7, 2025-6pm PST Dec 14, 2025
 
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