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

Tracking Winter Weather and Frigid Temperatures This Weekend

Another clipper will drop into the Northern Plains and Upper Midwest into Sunday with snow and gusty winds contributing to some areas of blizzard conditions and snow squalls. Impactful snowfall will occur up and down the East Coast Sunday extending from the western Florida Panhandle to Maine. Read More >

Hazardous Weather Conditions

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Overcast

31°F

-1°C

Humidity 90%
Wind Speed N 0 MPH
Barometer 30.53 in (1033.86 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Last update 18 Jan 06:55 AM PST
Extended Forecast for

Prosser WA

Air Stagnation Advisory January 18, 07:02am until January 20, 04:00pm
Click here for hazard details and duration
Air Stagnation Advisory
  •  
    Air Stagnation Advisory January 18, 07:02am until January 20, 04:00pm

    NOW until 4:00pm Tue

    Air Stagnation Advisory

  • Today

    High: 38 °F

    Patchy
    Freezing Fog
    then Mostly
    Cloudy

  • Tonight

    Tonight: Patchy freezing fog after 10pm. Cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Patchy
    Freezing Fog

  • M.L.King Day

    M.L.King Day: Patchy freezing fog before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 39. Calm wind.

    High: 39 °F

    Patchy
    Freezing Fog
    then Mostly
    Sunny

  • Monday Night

    Monday Night: Patchy freezing fog after 10pm. Partly cloudy, with a low around 25. Calm wind.

    Low: 25 °F

    Patchy
    Freezing Fog

  • Tuesday

    Tuesday: Partly sunny, with a high near 38. Light north wind.

    High: 38 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Patchy freezing fog after 1am. Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy
    then Patchy
    Freezing Fog

  • Wednesday

    Wednesday: Patchy freezing fog before 10am. Mostly cloudy, with a high near 39.

    High: 39 °F

    Patchy
    Freezing Fog
    then Mostly
    Cloudy

  • Wednesday Night

    Wednesday Night: Patchy freezing fog after 10pm. Mostly cloudy, with a low around 25.

    Low: 25 °F

    Patchy
    Freezing Fog

Detailed Forecast

Today
Patchy freezing fog before 10am. Mostly cloudy, with a high near 38. Calm wind.
Tonight
Patchy freezing fog after 10pm. Cloudy, with a low around 25. Calm wind.
M.L.King Day
Patchy freezing fog before 10am. Cloudy, then gradually becoming mostly sunny, with a high near 39. Calm wind.
Monday Night
Patchy freezing fog after 10pm. Partly cloudy, with a low around 25. Calm wind.
Tuesday
Partly sunny, with a high near 38. Light north wind.
Tuesday Night
Patchy freezing fog after 1am. Partly cloudy, with a low around 25.
Wednesday
Patchy freezing fog before 10am. Mostly cloudy, with a high near 39.
Wednesday Night
Patchy freezing fog after 10pm. Mostly cloudy, with a low around 25.
Thursday
Patchy freezing fog before 10am. Mostly cloudy, with a high near 41.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
A chance of rain and snow. Partly sunny, with a high near 44.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 23.
Saturday
A slight chance of rain and snow. Partly sunny, with a high near 37.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.22°N 119.79°W (Elev. 715 ft)
Last Update:
4:21 am PST Jan 18, 2026
Forecast Valid:
7am PST Jan 18, 2026-6pm PST Jan 24, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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