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

Tracking a Winter Storm; Unusual Early-Season Heat Wave in the Southwest

A major winter storm will organize across the Northern Plains today and then rapidly strengthen as it moves into the Great Lakes on Sunday. Heavy snow and blowing snow are likely to persist over the Great Lakes into Monday night. Dry and gusty winds will produce a critical fire risk across the central/southern Plains. An early heatwave will begin to intensify over the western U.S. into next week. 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

Sunnyside WA

  • Today

    Today: Mostly sunny, with a high near 50. West wind 9 to 13 mph, with gusts as high as 23 mph.

    High: 50 °F

    Mostly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 27. Northwest wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 21 mph.

    Low: 27 °F

    Partly Cloudy

  • Sunday

    Sunday: Increasing clouds, with a high near 50. Light and variable wind.

    High: 50 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: A 20 percent chance of rain before 11pm. Cloudy, with a low around 36. Light south wind.

    Low: 36 °F

    Slight Chance
    Rain then
    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 66. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 66 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 45.

    Low: 45 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A 20 percent chance of rain after 11am. Mostly cloudy, with a high near 70.

    High: 70 °F

    Slight Chance
    Rain

  • Tuesday Night

    Tuesday Night: A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 48.

    Low: 48 °F

    Slight Chance
    Rain then
    Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 70.

    High: 70 °F

    Mostly Cloudy

Detailed Forecast

Today
Mostly sunny, with a high near 50. West wind 9 to 13 mph, with gusts as high as 23 mph.
Tonight
Partly cloudy, with a low around 27. Northwest wind 5 to 10 mph becoming light in the evening. Winds could gust as high as 21 mph.
Sunday
Increasing clouds, with a high near 50. Light and variable wind.
Sunday Night
A 20 percent chance of rain before 11pm. Cloudy, with a low around 36. Light south wind.
Monday
Partly sunny, with a high near 66. Calm wind becoming southwest around 6 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 45.
Tuesday
A 20 percent chance of rain after 11am. Mostly cloudy, with a high near 70.
Tuesday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 48.
Wednesday
Mostly cloudy, with a high near 70.
Wednesday Night
A slight chance of rain. Mostly cloudy, with a low around 50.
Thursday
Mostly cloudy, with a high near 73.
Thursday Night
Mostly cloudy, with a low around 49.
Friday
Partly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Sunnyside WA
 46.32°N 120°W (Elev. 748 ft)
Last Update:
4:20 am PDT Mar 14, 2026
Forecast Valid:
8am PDT Mar 14, 2026-6pm PDT Mar 20, 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