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: Sunny, with a high near 71. Light and variable wind becoming northeast 5 to 7 mph in the afternoon.

    High: 71 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 44. Northeast wind 5 to 7 mph becoming light and variable after midnight.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Increasing clouds, with a high near 72. North wind 3 to 5 mph.

    High: 72 °F

    Increasing
    Clouds

  • Friday Night

    Friday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 48. Southwest wind around 6 mph becoming calm in the evening.

    Low: 48 °F

    Chance Rain

  • Saturday

    Saturday: A 50 percent chance of rain. Mostly cloudy, with a high near 68. Calm wind becoming southwest 5 to 8 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.

    High: 68 °F

    Chance Rain

  • Saturday Night

    Saturday Night: A 50 percent chance of rain. Mostly cloudy, with a low around 46.

    Low: 46 °F

    Chance Rain

  • Sunday

    Sunday: A 40 percent chance of rain. Mostly cloudy, with a high near 61.

    High: 61 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance Rain

  • Monday

    Monday: Mostly sunny, with a high near 64.

    High: 64 °F

    Mostly Sunny

Detailed Forecast

Today
Sunny, with a high near 71. Light and variable wind becoming northeast 5 to 7 mph in the afternoon.
Tonight
Mostly clear, with a low around 44. Northeast wind 5 to 7 mph becoming light and variable after midnight.
Friday
Increasing clouds, with a high near 72. North wind 3 to 5 mph.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 48. Southwest wind around 6 mph becoming calm in the evening.
Saturday
A 50 percent chance of rain. Mostly cloudy, with a high near 68. Calm wind becoming southwest 5 to 8 mph in the afternoon. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 46.
Sunday
A 40 percent chance of rain. Mostly cloudy, with a high near 61.
Sunday Night
A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 42.
Monday
Mostly sunny, with a high near 64.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Mostly sunny, with a high near 63.
Tuesday Night
Mostly cloudy, with a low around 42.
Wednesday
A chance of rain. Mostly cloudy, with a high near 61.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.22°N 119.79°W (Elev. 715 ft)
Last Update:
4:01 am PDT Apr 9, 2026
Forecast Valid:
7am PDT Apr 9, 2026-6pm PDT Apr 15, 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