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

Lewiston, Lewiston-Nez Perce County Airport (KLWS)

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

Rain

45°F

7°C

Humidity 93%
Wind Speed NNW 3 MPH
Barometer 29.67 in (1004.74 mb)
Dewpoint 43°F (6°C)
Visibility 10.00 mi
Last update 25 Dec 12:30 AM PST
Extended Forecast for

Lewiston ID

  • Overnight

    Overnight: Mostly cloudy, with a steady temperature around 44. Calm wind.

    Low: 44 °F

    Mostly Cloudy

  • Christmas Day

    Christmas Day: A 30 percent chance of rain, mainly after 1pm. Mostly cloudy, with a high near 53. Northeast wind around 6 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Chance Rain

  • Thursday Night

    Thursday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 41. Southeast wind 3 to 5 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance Rain

  • Friday

    Friday: Rain likely. Mostly cloudy, with a high near 51. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F

    Rain Likely

  • Friday Night

    Friday Night: Rain likely before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 35. West wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    Low: 35 °F

    Rain Likely
    then Chance
    Rain/Snow

  • Saturday

    Saturday: A 30 percent chance of snow before 10am. Mostly sunny, with a high near 43. Little or no snow accumulation expected.

    High: 43 °F

    Chance Snow
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 40.

    High: 40 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a steady temperature around 44. Calm wind.
Christmas Day
A 30 percent chance of rain, mainly after 1pm. Mostly cloudy, with a high near 53. Northeast wind around 6 mph. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 41. Southeast wind 3 to 5 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain likely. Mostly cloudy, with a high near 51. Light and variable wind becoming southwest 5 to 10 mph in the morning. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain likely before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 35. West wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Saturday
A 30 percent chance of snow before 10am. Mostly sunny, with a high near 43. Little or no snow accumulation expected.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 40.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Mostly sunny, with a high near 42.
Monday Night
Mostly cloudy, with a low around 31.
Tuesday
Mostly sunny, with a high near 45.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Mostly sunny, with a high near 46.
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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:
9:17 pm PST Dec 24, 2025
Forecast Valid:
12am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
Forecast Discussion
 
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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