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

Late January Extreme Cold; Watching for Another East Coast Storm Threat This Weekend

Well below normal temperatures will continue for the eastern half of the Lower 48 this week. Another blast of arctic air will spread from the Plains through the East/Southeast Friday into Saturday with more record lows expected even into Florida. Forecasts are being monitored for increasing potential of another significant winter storm to impact the eastern United States this coming weekend. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

22°F

-6°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.38 in (1028.79 mb)
Dewpoint 21°F (-6°C)
Visibility 7.00 mi
Last update 27 Jan 01:35 AM PST
Extended Forecast for

Prosser WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 23. Light north wind.

    Low: 23 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 38. Northwest wind around 6 mph.

    High: 38 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A slight chance of rain, snow, and freezing rain between 10pm and 1am. Snow level 1200 feet rising to 3900 feet after midnight. Cloudy, with a low around 28. West wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 20%.

    Low: 28 °F

    Slight Chance
    Wintry Mix

  • Wednesday

    Wednesday: A 10 percent chance of rain after 4pm. Increasing clouds, with a high near 45. South wind 3 to 6 mph.

    High: 45 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: A 40 percent chance of rain, mainly after 10pm. Cloudy, with a low around 35. South wind 3 to 5 mph.

    Low: 35 °F

    Chance Rain

  • Thursday

    Thursday: A 50 percent chance of rain, mainly before 10am. Cloudy, with a high near 46.

    High: 46 °F

    Chance Rain
    then Slight
    Chance Rain

  • Thursday Night

    Thursday Night: A 50 percent chance of rain. Cloudy, with a low around 36.

    Low: 36 °F

    Chance Rain

  • Friday

    Friday: A 30 percent chance of rain, mainly before 10am. Cloudy, with a high near 47.

    High: 47 °F

    Chance Rain

  • Friday Night

    Friday Night: A 20 percent chance of rain before 10pm. Mostly cloudy, with a low around 35.

    Low: 35 °F

    Slight Chance
    Rain then
    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 23. Light north wind.
Tuesday
Mostly cloudy, with a high near 38. Northwest wind around 6 mph.
Tuesday Night
A slight chance of rain, snow, and freezing rain between 10pm and 1am. Snow level 1200 feet rising to 3900 feet after midnight. Cloudy, with a low around 28. West wind around 5 mph becoming light and variable in the evening. Chance of precipitation is 20%.
Wednesday
A 10 percent chance of rain after 4pm. Increasing clouds, with a high near 45. South wind 3 to 6 mph.
Wednesday Night
A 40 percent chance of rain, mainly after 10pm. Cloudy, with a low around 35. South wind 3 to 5 mph.
Thursday
A 50 percent chance of rain, mainly before 10am. Cloudy, with a high near 46.
Thursday Night
A 50 percent chance of rain. Cloudy, with a low around 36.
Friday
A 30 percent chance of rain, mainly before 10am. Cloudy, with a high near 47.
Friday Night
A 20 percent chance of rain before 10pm. Mostly cloudy, with a low around 35.
Saturday
Mostly cloudy, with a high near 48.
Saturday Night
Cloudy, with a low around 36.
Sunday
A slight chance of rain. Mostly cloudy, with a high near 49.
Sunday Night
A slight chance of rain. Mostly cloudy, with a low around 36.
Monday
Partly sunny, with a high near 52.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.21°N 119.75°W (Elev. 741 ft)
Last Update:
1:30 am PST Jan 27, 2026
Forecast Valid:
1am PST Jan 27, 2026-6pm PST Feb 2, 2026
 
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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