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

  • Tonight

    Tonight: Partly cloudy, with a low around 43. Northeast wind 5 to 7 mph becoming light and variable after midnight.

    Low: 43 °F

    Partly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 70. West wind 3 to 6 mph.

    High: 70 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: A 30 percent chance of rain. Mostly cloudy, with a low around 48. West wind 3 to 5 mph.

    Low: 48 °F

    Chance Rain

  • Saturday

    Saturday: A chance of rain before 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 71. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 40%.

    High: 71 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 46. Southwest wind 3 to 8 mph.

    Low: 46 °F

    Chance Rain
    then Mostly
    Cloudy

  • Sunday

    Sunday: A 20 percent chance of rain after 11am. Partly sunny, with a high near 69.

    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 44.

    Low: 44 °F

    Chance Rain

  • Monday

    Monday: Mostly sunny, with a high near 66.

    High: 66 °F

    Mostly Sunny

  • Monday Night

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

    Low: 39 °F

    Partly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 43. Northeast wind 5 to 7 mph becoming light and variable after midnight.
Friday
Mostly cloudy, with a high near 70. West wind 3 to 6 mph.
Friday Night
A 30 percent chance of rain. Mostly cloudy, with a low around 48. West wind 3 to 5 mph.
Saturday
A chance of rain before 2pm, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 71. Calm wind becoming southwest 5 to 8 mph in the afternoon. Chance of precipitation is 40%.
Saturday Night
A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 46. Southwest wind 3 to 8 mph.
Sunday
A 20 percent chance of rain after 11am. Partly sunny, with a high near 69.
Sunday Night
A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 44.
Monday
Mostly sunny, with a high near 66.
Monday Night
Partly cloudy, with a low around 39.
Tuesday
Partly sunny, with a high near 61.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 41.
Wednesday
A chance of rain. Partly sunny, with a high near 59.
Wednesday Night
Partly cloudy, with a low around 34.
Thursday
Mostly sunny, with a high near 59.
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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:
3:01 pm PDT Apr 9, 2026
Forecast Valid:
3pm PDT Apr 9, 2026-6pm PDT Apr 16, 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