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

Sunnyside Municipal Airport (K1S5)

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

Overcast

38°F

3°C

Humidity 97%
Wind Speed N 0 MPH
Barometer 30.0 in (1015.92 mb)
Dewpoint 38°F (3°C)
Visibility 7.00 mi
Last update 15 Feb 05:15 AM PST
Extended Forecast for

5 Miles WNW Alderdale WA

  • Overnight

    Overnight: A 30 percent chance of rain. Cloudy, with a low around 39. Light north wind.

    Low: 39 °F

    Chance Rain

  • Sunday

    Sunday: A 30 percent chance of rain before 7am. Mostly cloudy, with a high near 45. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 45 °F

    Chance Rain
    then Mostly
    Cloudy

  • Sunday Night

    Sunday Night: A chance of rain between 1am and 4am, then rain likely, possibly mixed with snow. Mostly cloudy, with a low around 36. West wind around 5 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.

    Low: 36 °F

    Mostly Cloudy
    then
    Rain/Snow
    Likely

  • Washington's Birthday

    Washington's Birthday: Rain likely, possibly mixed with snow before 10am, then a chance of rain. Snow level 3300 feet lowering to 1800 feet in the afternoon . Mostly cloudy, with a high near 44. Southwest wind 6 to 15 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 44 °F

    Rain/Snow
    Likely then
    Chance Rain

  • Monday Night

    Monday Night: A slight chance of rain and snow before 10pm, then a slight chance of snow after 4am. Snow level 1400 feet lowering to 900 feet after midnight . Mostly cloudy, with a low around 29. Southwest wind 6 to 10 mph. Chance of precipitation is 20%.

    Low: 29 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Tuesday

    Tuesday: A slight chance of snow before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of rain after 1pm. Snow level rising to 1400 feet in the afternoon. Partly sunny, with a high near 43. Chance of precipitation is 30%.

    High: 43 °F

    Chance
    Rain/Snow

  • Tuesday Night

    Tuesday Night: A chance of rain before 7pm, then a chance of rain and snow. Snow level 1200 feet. Mostly cloudy, with a low around 30. Chance of precipitation is 40%.

    Low: 30 °F

    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of snow before 1pm, then a chance of rain and snow. Partly sunny, with a high near 43. Chance of precipitation is 30%.

    High: 43 °F

    Chance Snow
    then Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A chance of rain and snow before 10pm, then a chance of snow. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.

    Low: 29 °F

    Chance
    Rain/Snow
    then Chance
    Snow

Detailed Forecast

Overnight
A 30 percent chance of rain. Cloudy, with a low around 39. Light north wind.
Sunday
A 30 percent chance of rain before 7am. Mostly cloudy, with a high near 45. Calm wind becoming southeast around 5 mph in the afternoon.
Sunday Night
A chance of rain between 1am and 4am, then rain likely, possibly mixed with snow. Mostly cloudy, with a low around 36. West wind around 5 mph. Chance of precipitation is 60%. Little or no snow accumulation expected.
Washington's Birthday
Rain likely, possibly mixed with snow before 10am, then a chance of rain. Snow level 3300 feet lowering to 1800 feet in the afternoon . Mostly cloudy, with a high near 44. Southwest wind 6 to 15 mph, with gusts as high as 18 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Monday Night
A slight chance of rain and snow before 10pm, then a slight chance of snow after 4am. Snow level 1400 feet lowering to 900 feet after midnight . Mostly cloudy, with a low around 29. Southwest wind 6 to 10 mph. Chance of precipitation is 20%.
Tuesday
A slight chance of snow before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of rain after 1pm. Snow level rising to 1400 feet in the afternoon. Partly sunny, with a high near 43. Chance of precipitation is 30%.
Tuesday Night
A chance of rain before 7pm, then a chance of rain and snow. Snow level 1200 feet. Mostly cloudy, with a low around 30. Chance of precipitation is 40%.
Wednesday
A chance of snow before 1pm, then a chance of rain and snow. Partly sunny, with a high near 43. Chance of precipitation is 30%.
Wednesday Night
A chance of rain and snow before 10pm, then a chance of snow. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Thursday
A chance of snow before 4pm, then a slight chance of rain and snow. Mostly cloudy, with a high near 41.
Thursday Night
A slight chance of rain and snow. Partly cloudy, with a low around 30.
Friday
A chance of rain and snow. Mostly sunny, with a high near 43.
Friday Night
A chance of rain and snow. Snow level 1100 feet. Mostly cloudy, with a low around 32.
Saturday
A chance of rain and snow. Snow level rising to 1400 feet in the afternoon. Mostly cloudy, with a high near 45.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
5 Miles WNW Alderdale WA
 45.91°N 120.02°W (Elev. 902 ft)
Last Update:
4:21 am PST Feb 15, 2026
Forecast Valid:
5am PST Feb 15, 2026-6pm PST Feb 21, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation