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

Critical Fire Weather in the High Plains; Heat Continues in the West

Critical fire weather conditions will persist in the central High Plains through Friday as gusty winds and dry conditions continue. The heat wave across the West and Southwest will continue to intensify through the week, with daily and monthly record highs expected to be broken. Read More >

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 cloudy, with a low around 55. Southwest wind around 8 mph.

    Low: 55 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 76. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.

    High: 76 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 53. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.

    Low: 53 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 74. Southwest wind 7 to 16 mph, with gusts as high as 24 mph.

    High: 74 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 44. West wind 8 to 16 mph, with gusts as high as 23 mph.

    Low: 44 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 59.

    High: 59 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 55. Southwest wind around 8 mph.
Thursday
Mostly cloudy, with a high near 76. Southwest wind 7 to 14 mph, with gusts as high as 21 mph.
Thursday Night
Mostly cloudy, with a low around 53. Southwest wind 7 to 13 mph, with gusts as high as 21 mph.
Friday
Mostly cloudy, with a high near 74. Southwest wind 7 to 16 mph, with gusts as high as 24 mph.
Friday Night
Mostly cloudy, with a low around 44. West wind 8 to 16 mph, with gusts as high as 23 mph.
Saturday
Mostly sunny, with a high near 60.
Saturday Night
Mostly clear, with a low around 33.
Sunday
Sunny, with a high near 59.
Sunday Night
Mostly cloudy, with a low around 38.
Monday
Partly sunny, with a high near 59.
Monday Night
Mostly cloudy, with a low around 43.
Tuesday
A chance of rain. Mostly cloudy, with a high near 59.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 39.
Wednesday
A chance of rain. Mostly sunny, with a high near 60.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
Last Update:
10:15 pm PDT Mar 18, 2026
Forecast Valid:
11pm PDT Mar 18, 2026-6pm PDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation