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

Heat the Southwest; Fire Weather in the Central U.S.; Kona Low Impacting Hawaii

A rare March heat wave is ongoing with much above-normal temperatures over the Southwest U.S. through this weekend. Periods of critical fire weather will persist from the central Rockies to the central and southern Plains through the weekend as gusty winds and low relative humidity continue. A Kona low will continue to bring several rounds of moderate to heavy rainfall to Hawaii through Sunday. 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

  • Today

    Today: Areas of frost before 11am. Otherwise, increasing clouds, with a high near 59. Light and variable wind becoming southeast around 5 mph in the afternoon.

    High: 59 °F

    Areas Frost
    then Partly
    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 37. East wind around 5 mph becoming light and variable.

    Low: 37 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 63. West wind around 5 mph becoming light and variable.

    High: 63 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 46. South wind around 6 mph.

    Low: 46 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Rain likely, mainly after 11am. Mostly cloudy, with a high near 61. South wind 6 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    High: 61 °F

    Rain Likely

  • Tuesday Night

    Tuesday Night: A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 42.

    Low: 42 °F

    Chance Rain
    then Mostly
    Cloudy

  • Wednesday

    Wednesday: A 20 percent chance of rain. Mostly sunny, with a high near 60.

    High: 60 °F

    Slight Chance
    Rain

  • Wednesday Night

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

    Low: 33 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 57.

    High: 57 °F

    Sunny

Detailed Forecast

Today
Areas of frost before 11am. Otherwise, increasing clouds, with a high near 59. Light and variable wind becoming southeast around 5 mph in the afternoon.
Tonight
Mostly cloudy, with a low around 37. East wind around 5 mph becoming light and variable.
Monday
Partly sunny, with a high near 63. West wind around 5 mph becoming light and variable.
Monday Night
Mostly cloudy, with a low around 46. South wind around 6 mph.
Tuesday
Rain likely, mainly after 11am. Mostly cloudy, with a high near 61. South wind 6 to 14 mph, with gusts as high as 20 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 42.
Wednesday
A 20 percent chance of rain. Mostly sunny, with a high near 60.
Wednesday Night
Mostly clear, with a low around 33.
Thursday
Sunny, with a high near 57.
Thursday Night
Mostly clear, with a low around 33.
Friday
Sunny, with a high near 60.
Friday Night
Partly cloudy, with a low around 37.
Saturday
Mostly sunny, with a high near 64.
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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:
4:20 am PDT Mar 22, 2026
Forecast Valid:
4am PDT Mar 22, 2026-6pm PDT Mar 28, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation