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

Sunnyside Municipal Airport (K1S5)

Lat: 46.3271°NLon: 119.9704°WElev: 768.0ft.

Mist

34°F

1°C

Humidity 97%
Wind Speed S 5 MPH
Barometer 29.66 in (1004.4 mb)
Dewpoint 33°F (1°C)
Visibility 5.00 mi
Wind Chill29°F (-2°C)
Last update 25 Dec 06:35 AM PST
Extended Forecast for

Grandview WA

  • Christmas Day

    Christmas Day: A chance of rain before 1pm, then a chance of rain after 4pm. Mostly cloudy, with a high near 44. West wind 3 to 5 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 44 °F

    Chance Rain

  • Tonight

    Tonight: A chance of rain before 10pm, then a chance of rain after 1am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 31. Calm wind. Chance of precipitation is 40%.

    Low: 31 °F

    Chance Rain
    and Patchy
    Fog

  • Friday

    Friday: A 50 percent chance of rain. Mostly cloudy, with a high near 46. Southwest wind 5 to 13 mph, with gusts as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 46 °F

    Chance Rain

  • Friday Night

    Friday Night: A 30 percent chance of rain before 10pm. Snow level 1600 feet lowering to 800 feet after midnight . Partly cloudy, with a low around 27. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.

    Low: 27 °F

    Chance Rain
    then Partly
    Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 41. Northwest wind around 6 mph.

    High: 41 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 22.

    Low: 22 °F

    Partly Cloudy
    then Patchy
    Fog

  • Sunday

    Sunday: Patchy fog before 7am. Otherwise, mostly sunny, with a high near 36.

    High: 36 °F

    Patchy Fog
    then Mostly
    Sunny

  • Sunday Night

    Sunday Night: Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Monday

    Monday: Patchy fog before 10am. Otherwise, partly sunny, with a high near 35.

    High: 35 °F

    Patchy Fog
    then Mostly
    Cloudy

Detailed Forecast

Christmas Day
A chance of rain before 1pm, then a chance of rain after 4pm. Mostly cloudy, with a high near 44. West wind 3 to 5 mph. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
A chance of rain before 10pm, then a chance of rain after 1am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 31. Calm wind. Chance of precipitation is 40%.
Friday
A 50 percent chance of rain. Mostly cloudy, with a high near 46. Southwest wind 5 to 13 mph, with gusts as high as 18 mph. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A 30 percent chance of rain before 10pm. Snow level 1600 feet lowering to 800 feet after midnight . Partly cloudy, with a low around 27. Southwest wind 9 to 13 mph, with gusts as high as 22 mph.
Saturday
Mostly sunny, with a high near 41. Northwest wind around 6 mph.
Saturday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 22.
Sunday
Patchy fog before 7am. Otherwise, mostly sunny, with a high near 36.
Sunday Night
Patchy fog after 4am. Otherwise, mostly cloudy, with a low around 20.
Monday
Patchy fog before 10am. Otherwise, partly sunny, with a high near 35.
Monday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 21.
Tuesday
Patchy fog. Otherwise, mostly cloudy, with a high near 35.
Tuesday Night
Patchy fog. Otherwise, mostly cloudy, with a low around 23.
Wednesday
Patchy fog. Otherwise, mostly cloudy, with a high near 38.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grandview WA
 46.25°N 119.89°W (Elev. 827 ft)
Last Update:
5:20 am PST Dec 25, 2025
Forecast Valid:
6am PST Dec 25, 2025-6pm PST Dec 31, 2025
 
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Additional Resources

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Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation