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

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

An anomalously early heat wave will continue to intensify and expand across the West and Southwest as the week progresses. Numerous daily and potentially monthly record highs are expected to be broken. Critical fire weather conditions will continue over the next couple of days across portions of the High Plains as gusty winds and dry conditions persist. 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

11 Miles SSW Mattawa WA

  • Tonight

    Tonight: Mostly cloudy, with a low around 49. Southwest wind around 17 mph, with gusts as high as 25 mph.

    Low: 49 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 62. Southwest wind around 18 mph, with gusts as high as 29 mph.

    High: 62 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 49. Southwest wind 15 to 18 mph, with gusts as high as 28 mph.

    Low: 49 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 63. Southwest wind 14 to 21 mph, with gusts as high as 30 mph.

    High: 63 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 50. Breezy, with a southwest wind 15 to 24 mph, with gusts as high as 34 mph.

    Low: 50 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 62. Breezy.

    High: 62 °F

    Mostly Cloudy
    then Partly
    Sunny and
    Breezy

  • Friday Night

    Friday Night: A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 40. Breezy.

    Low: 40 °F

    Slight Chance
    Rain and
    Breezy then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 49.

    High: 49 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 33.

    Low: 33 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 49. Southwest wind around 17 mph, with gusts as high as 25 mph.
Wednesday
Mostly cloudy, with a high near 62. Southwest wind around 18 mph, with gusts as high as 29 mph.
Wednesday Night
Mostly cloudy, with a low around 49. Southwest wind 15 to 18 mph, with gusts as high as 28 mph.
Thursday
Partly sunny, with a high near 63. Southwest wind 14 to 21 mph, with gusts as high as 30 mph.
Thursday Night
Mostly cloudy, with a low around 50. Breezy, with a southwest wind 15 to 24 mph, with gusts as high as 34 mph.
Friday
Mostly cloudy, with a high near 62. Breezy.
Friday Night
A 20 percent chance of rain before 11pm. Mostly cloudy, with a low around 40. Breezy.
Saturday
Mostly sunny, with a high near 49.
Saturday Night
Partly cloudy, with a low around 33.
Sunday
Mostly sunny, with a high near 49.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Partly sunny, with a high near 50.
Monday Night
A slight chance of rain and snow. Snow level 4200 feet. Mostly cloudy, with a low around 39.
Tuesday
A chance of rain and snow. Snow level 3600 feet. Mostly cloudy, with a high near 50. Breezy.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SSW Mattawa WA
 46.59°N 119.98°W (Elev. 3100 ft)
Last Update:
10:15 pm PDT Mar 17, 2026
Forecast Valid:
11pm PDT Mar 17, 2026-6pm PDT Mar 24, 2026
 
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Additional Resources

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Chance of Precipitation