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

Fire Weather Concerns; Record Warmth Spreads

The Plains to the mid-Mississippi Valley continue with warm and dry conditions. Any fires that initiate could spread quickly. The warm temperatures will expand across the Southern Plains into the Southwest where numerous records are expected through the weekend. Meanwhile, a cold front will move southward across the northern Plains and Great Lakes region where some snow will develop this weekend. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Clear

31°F

-1°C

Humidity 93%
Wind Speed N 0 MPH
Barometer 30.09 in (1018.96 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Last update 01 Mar 02:15 AM PST
Extended Forecast for

Prosser WA

  • Overnight

    Overnight: Mostly cloudy, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 56. Calm wind.

    High: 56 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 35. Calm wind.

    Low: 35 °F

    Mostly Cloudy

  • Monday

    Monday: Sunny, with a high near 60. Calm wind becoming south around 5 mph in the afternoon.

    High: 60 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 38. Light and variable wind.

    Low: 38 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly cloudy, with a high near 60.

    High: 60 °F

    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: Rain likely, mainly after 4am. Cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Rain Likely

  • Wednesday

    Wednesday: Rain likely, mainly before 10am. Mostly cloudy, with a high near 57. Chance of precipitation is 60%.

    High: 57 °F

    Rain Likely

  • Wednesday Night

    Wednesday Night: A 30 percent chance of rain before 10pm. Partly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain
    then Partly
    Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 35. Calm wind.
Sunday
Partly sunny, with a high near 56. Calm wind.
Sunday Night
Mostly cloudy, with a low around 35. Calm wind.
Monday
Sunny, with a high near 60. Calm wind becoming south around 5 mph in the afternoon.
Monday Night
Partly cloudy, with a low around 38. Light and variable wind.
Tuesday
Mostly cloudy, with a high near 60.
Tuesday Night
Rain likely, mainly after 4am. Cloudy, with a low around 43. Chance of precipitation is 60%.
Wednesday
Rain likely, mainly before 10am. Mostly cloudy, with a high near 57. Chance of precipitation is 60%.
Wednesday Night
A 30 percent chance of rain before 10pm. Partly cloudy, with a low around 38.
Thursday
A slight chance of rain after 10am. Partly sunny, with a high near 55.
Thursday Night
A slight chance of rain. Partly cloudy, with a low around 38.
Friday
Mostly sunny, with a high near 57.
Friday Night
A slight chance of rain. Mostly cloudy, with a low around 39.
Saturday
A chance of rain. Mostly cloudy, with a high near 57.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.22°N 119.79°W (Elev. 715 ft)
Last Update:
2:31 am PST Mar 1, 2026
Forecast Valid:
2am PST Mar 1, 2026-6pm PST Mar 7, 2026
 
Forecast Discussion
 
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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