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.

Clear

N/A

Humidity 87%
Wind Speed N 0 MPH
Barometer NA
Dewpoint N/A
Visibility 10.00 mi
Last update 10 Mar 07:35 AM PDT
Extended Forecast for

Prosser WA

  • Today

    Today: Mostly cloudy, with a high near 70. West wind around 6 mph.

    High: 70 °F

    Mostly Cloudy

  • Tonight

    Tonight: A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 47. West wind around 6 mph becoming light and variable after midnight.

    Low: 47 °F

    Chance Rain

  • Saturday

    Saturday: A 40 percent chance of rain. Partly sunny, with a high near 70. Light south wind becoming southwest 5 to 9 mph in the morning.

    High: 70 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A 20 percent chance of rain before 11pm. Partly cloudy, with a low around 44. West wind 5 to 9 mph.

    Low: 44 °F

    Slight Chance
    Rain then
    Partly Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain after 11am. Partly sunny, with a high near 69. West wind 3 to 7 mph.

    High: 69 °F

    Slight Chance
    Rain

  • Sunday Night

    Sunday Night: A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 45.

    Low: 45 °F

    Chance Rain

  • Monday

    Monday: Mostly sunny, with a high near 67.

    High: 67 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

Detailed Forecast

Today
Mostly cloudy, with a high near 70. West wind around 6 mph.
Tonight
A 30 percent chance of rain, mainly after 11pm. Mostly cloudy, with a low around 47. West wind around 6 mph becoming light and variable after midnight.
Saturday
A 40 percent chance of rain. Partly sunny, with a high near 70. Light south wind becoming southwest 5 to 9 mph in the morning.
Saturday Night
A 20 percent chance of rain before 11pm. Partly cloudy, with a low around 44. West wind 5 to 9 mph.
Sunday
A 20 percent chance of rain after 11am. Partly sunny, with a high near 69. West wind 3 to 7 mph.
Sunday Night
A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 45.
Monday
Mostly sunny, with a high near 67.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
A chance of rain, mainly after 11pm. Mostly cloudy, with a low around 41.
Wednesday
A slight chance of rain. Partly sunny, with a high near 58.
Wednesday Night
Partly cloudy, with a low around 34.
Thursday
Mostly sunny, with a high near 60.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
Last Update:
4:01 am PDT Apr 10, 2026
Forecast Valid:
6am PDT Apr 10, 2026-6pm PDT Apr 16, 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