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.

Clear

37°F

3°C

Humidity 91%
Wind Speed NE 6 MPH
Barometer 29.71 in (1006.1 mb)
Dewpoint 34°F (1°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 25 Dec 09:35 PM PST
Extended Forecast for

2 Miles ENE Sunnyside WA

  • Tonight

    Tonight: A slight chance of rain before 10pm, then rain likely after 1am. Patchy fog after 10pm. Otherwise, cloudy, with a low around 33. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 33 °F

    Rain Likely
    and Patchy
    Fog

  • Friday

    Friday: Rain likely, mainly before 7am. Mostly cloudy, with a high near 47. Southeast wind 5 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 47 °F

    Rain Likely
    then Slight
    Chance Rain

  • Friday Night

    Friday Night: A slight chance of rain and snow before 10pm. Partly cloudy, with a low around 27. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 27 °F

    Slight Chance
    Rain/Snow
    then Partly
    Cloudy

  • Saturday

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

    High: 41 °F

    Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 22. Calm wind.

    Low: 22 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 22.

    Low: 22 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of rain before 10pm, then rain likely after 1am. Patchy fog after 10pm. Otherwise, cloudy, with a low around 33. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain likely, mainly before 7am. Mostly cloudy, with a high near 47. Southeast wind 5 to 11 mph becoming southwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A slight chance of rain and snow before 10pm. Partly cloudy, with a low around 27. Southwest wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Saturday
Sunny, with a high near 41. Northwest wind around 6 mph.
Saturday Night
Mostly cloudy, with a low around 22. Calm wind.
Sunday
Mostly sunny, with a high near 36.
Sunday Night
Mostly cloudy, with a low around 21.
Monday
Partly sunny, with a high near 35.
Monday Night
Mostly cloudy, with a low around 22.
Tuesday
Mostly cloudy, with a high near 35.
Tuesday Night
Mostly cloudy, with a low around 24.
Wednesday
Mostly cloudy, with a high near 38.
Wednesday Night
Mostly cloudy, with a low around 27.
New Year's Day
A slight chance of rain and snow. Mostly cloudy, with a high near 41.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles ENE Sunnyside WA
 46.33°N 119.97°W (Elev. 758 ft)
Last Update:
9:35 pm PST Dec 25, 2025
Forecast Valid:
9pm PST Dec 25, 2025-6pm PST Jan 1, 2026
 
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Additional Resources

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Chance of Precipitation