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

  • Overnight

    Overnight: Clear, with a low around 40. Calm wind.

    Low: 40 °F

    Clear

  • Thursday

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

    High: 71 °F

    Sunny

  • Thursday Night

    Thursday Night: 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.

    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

Detailed Forecast

Overnight
Clear, with a low around 40. Calm wind.
Thursday
Sunny, with a high near 71. Light and variable wind becoming northeast 5 to 7 mph in the afternoon.
Thursday Night
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.
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:
2:22 am PDT Apr 9, 2026
Forecast Valid:
2am PDT Apr 9, 2026-6pm PDT Apr 15, 2026
 
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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