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: Mostly clear, with a low around 41. Southeast wind around 5 mph becoming northwest in the evening.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 72. West wind 5 to 9 mph becoming northeast in the afternoon.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 44. Northeast wind 6 to 8 mph becoming northwest after midnight.

    Low: 44 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 73. North wind around 6 mph.

    High: 73 °F

    Mostly Sunny

  • Friday Night

    Friday Night: A 40 percent chance of rain. Mostly cloudy, with a low around 50. Southeast wind around 6 mph becoming southwest in the evening.

    Low: 50 °F

    Chance Rain

  • Saturday

    Saturday: A 50 percent chance of rain. Mostly cloudy, with a high near 69.

    High: 69 °F

    Chance Rain

  • Saturday Night

    Saturday Night: Rain likely, mainly before 11pm. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.

    Low: 44 °F

    Rain Likely

  • Sunday

    Sunday: A 40 percent chance of rain. Partly sunny, with a high near 60.

    High: 60 °F

    Chance Rain

  • Sunday Night

    Sunday Night: A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41.

    Low: 41 °F

    Chance Rain

Detailed Forecast

Tonight
Mostly clear, with a low around 41. Southeast wind around 5 mph becoming northwest in the evening.
Thursday
Sunny, with a high near 72. West wind 5 to 9 mph becoming northeast in the afternoon.
Thursday Night
Mostly clear, with a low around 44. Northeast wind 6 to 8 mph becoming northwest after midnight.
Friday
Mostly sunny, with a high near 73. North wind around 6 mph.
Friday Night
A 40 percent chance of rain. Mostly cloudy, with a low around 50. Southeast wind around 6 mph becoming southwest in the evening.
Saturday
A 50 percent chance of rain. Mostly cloudy, with a high near 69.
Saturday Night
Rain likely, mainly before 11pm. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Sunday
A 40 percent chance of rain. Partly sunny, with a high near 60.
Sunday Night
A 30 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 41.
Monday
Partly sunny, with a high near 62.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
Partly sunny, with a high near 63.
Tuesday Night
A slight chance of rain. Mostly cloudy, with a low around 43.
Wednesday
A slight chance of rain. Partly sunny, with a high near 63.
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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:
3:01 pm PDT Apr 8, 2026
Forecast Valid:
3pm PDT Apr 8, 2026-6pm PDT Apr 15, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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