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

Early Spring Heat Wave in the Southwest U.S.; Critical Fire Weather in the Central Rockies and Plains

An unusual early Spring heat wave will continue much above-normal temperatures over the Southwest U.S. through early next week. Many locations are likely to set records for the highest-ever March temperature. Periods of critical fire weather will persist from the central Rockies to the central Plains through Saturday as gusty winds and low relative humidity continue. 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: Mostly cloudy, with a high near 76. Southwest wind 8 to 15 mph, with gusts as high as 22 mph.

    High: 76 °F

    Mostly Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 53. South 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 76. West wind 7 to 16 mph, with gusts as high as 24 mph.

    High: 76 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Cloudy, with a low around 46. West wind 8 to 17 mph, with gusts as high as 25 mph.

    Low: 46 °F

    Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 61. West wind around 8 mph.

    High: 61 °F

    Mostly Sunny

  • Saturday Night

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

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 60.

    High: 60 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 61.

    High: 61 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly cloudy, with a high near 76. Southwest wind 8 to 15 mph, with gusts as high as 22 mph.
Tonight
Mostly cloudy, with a low around 53. South wind 7 to 13 mph, with gusts as high as 21 mph.
Friday
Mostly cloudy, with a high near 76. West wind 7 to 16 mph, with gusts as high as 24 mph.
Friday Night
Cloudy, with a low around 46. West wind 8 to 17 mph, with gusts as high as 25 mph.
Saturday
Mostly sunny, with a high near 61. West wind around 8 mph.
Saturday Night
Mostly clear, with a low around 33.
Sunday
Mostly sunny, with a high near 60.
Sunday Night
Mostly cloudy, with a low around 40.
Monday
Mostly cloudy, with a high near 61.
Monday Night
A slight chance of rain after 11pm. Mostly cloudy, with a low around 45.
Tuesday
A chance of rain. Mostly cloudy, with a high near 66.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 42.
Wednesday
A slight chance of rain. Mostly sunny, with a high near 58.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Prosser WA
 46.2°N 119.78°W (Elev. 646 ft)
Last Update:
4:20 am PDT Mar 19, 2026
Forecast Valid:
9am PDT Mar 19, 2026-6pm PDT Mar 25, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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