National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Severe Thunderstorms, Excessive Rainfall, and Extreme Heat Saturday

Severe thunderstorms capable of damaging winds will be possible from the Ozark Plateau east into the Tennessee Valley Saturday. Rounds of heavy thunderstorms ahead of a slow moving front will continue locally heavy rainfall and scattered flash flooding potential from the Ozarks to the Ohio and Tennessee Valleys Saturday. Extreme heat will continue for the Intermountain West and Plains. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

Lat: 46.3271°NLon: 119.9704°WElev: 768.0ft.

Clear

79°F

26°C

Humidity 43%
Wind Speed N 0 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Heat Index79°F (26°C)
Last update 11 Jul 10:55 AM PDT
Extended Forecast for

Prosser WA

  • Today

    Today: Increasing clouds, with a high near 91. Southwest wind 5 to 11 mph, with gusts as high as 21 mph.

    High: 91 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Mostly cloudy, with a low around 58. West wind 6 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.

    Low: 58 °F

    Mostly Cloudy

  • Sunday

    Sunday: Cloudy, then gradually becoming mostly sunny, with a high near 87. South wind around 6 mph becoming calm in the morning.

    High: 87 °F

    Decreasing
    Clouds

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 55. Light and variable wind.

    Low: 55 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 94. Light and variable wind.

    High: 94 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 97.

    High: 97 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 61.

    Low: 61 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Sunny, with a high near 96.

    High: 96 °F

    Sunny

Detailed Forecast

Today
Increasing clouds, with a high near 91. Southwest wind 5 to 11 mph, with gusts as high as 21 mph.
Tonight
Mostly cloudy, with a low around 58. West wind 6 to 10 mph becoming south after midnight. Winds could gust as high as 20 mph.
Sunday
Cloudy, then gradually becoming mostly sunny, with a high near 87. South wind around 6 mph becoming calm in the morning.
Sunday Night
Partly cloudy, with a low around 55. Light and variable wind.
Monday
Mostly sunny, with a high near 94. Light and variable wind.
Monday Night
Partly cloudy, with a low around 61.
Tuesday
Mostly sunny, with a high near 97.
Tuesday Night
Partly cloudy, with a low around 61.
Wednesday
Sunny, with a high near 96.
Wednesday Night
A slight chance of showers after 11pm. Partly cloudy, with a low around 58.
Thursday
Sunny, with a high near 93.
Thursday Night
Mostly clear, with a low around 58.
Friday
Sunny, with a high near 95.
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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:
10:11 am PDT Jul 11, 2026
Forecast Valid:
11am PDT Jul 11, 2026-6pm PDT Jul 17, 2026
 
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Additional Resources

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