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

Heavy Mountain Snow in the Northwest U.S.; Wintry Mix in the Northeast U.S.

Two more cold fronts will pass through the Northwest U.S. this week with heavy mountain snow continuing across the Cascades, and northern Rockies. A quick moving storm system will bring mixed precipitation including some freezing rain across the Northeast U.S. overnight into Wednesday. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

Lat: 46.3271°NLon: 119.9704°WElev: 768.0ft.

Overcast

43°F

6°C

Humidity 76%
Wind Speed SE 5 MPH
Barometer 29.66 in (1004.4 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill40°F (4°C)
Last update 06 Jan 10:35 PM PST
Extended Forecast for

11 Miles SE Mattawa WA

  • Tonight

    Tonight: Mostly clear, with a low around 32. Southwest wind around 10 mph, with gusts as high as 18 mph.

    Low: 32 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 48. Southwest wind 8 to 10 mph, with gusts as high as 18 mph.

    High: 48 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 30. Southwest wind around 9 mph.

    Low: 30 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 49. Southwest wind around 10 mph, with gusts as high as 18 mph.

    High: 49 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 33. Southwest wind around 8 mph.

    Low: 33 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly cloudy, with a high near 47.

    High: 47 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 30.

    Low: 30 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 43.

    High: 43 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 31.

    Low: 31 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 32. Southwest wind around 10 mph, with gusts as high as 18 mph.
Wednesday
Partly sunny, with a high near 48. Southwest wind 8 to 10 mph, with gusts as high as 18 mph.
Wednesday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 30. Southwest wind around 9 mph.
Thursday
Mostly sunny, with a high near 49. Southwest wind around 10 mph, with gusts as high as 18 mph.
Thursday Night
Mostly cloudy, with a low around 33. Southwest wind around 8 mph.
Friday
Mostly cloudy, with a high near 47.
Friday Night
Mostly cloudy, with a low around 30.
Saturday
Mostly cloudy, with a high near 43.
Saturday Night
Mostly cloudy, with a low around 31.
Sunday
Mostly cloudy, with a high near 46.
Sunday Night
Mostly cloudy, with a low around 31.
Monday
Partly sunny, with a high near 46.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
Mostly cloudy, with a high near 46.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
11 Miles SE Mattawa WA
 46.64°N 119.74°W (Elev. 400 ft)
Last Update:
9:15 pm PST Jan 6, 2026
Forecast Valid:
10pm PST Jan 6, 2026-6pm PST Jan 13, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

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Chance of Precipitation