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

Heavy Snow in the Cascades and Northern Rockies; Wintry Mix in the Northeast; High Winds in Southern California

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. today. High winds could blow down trees and power lines in the mountains of southern California this evening through Thursday. Read More >

Current conditions at

Sunnyside Municipal Airport (K1S5)

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

Overcast

44°F

7°C

Humidity 64%
Wind Speed SE 4 MPH
Barometer 29.7 in (1005.76 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill42°F (6°C)
Last update 07 Jan 01:55 PM PST
Extended Forecast for

11 Miles SE Mattawa WA

  • This Afternoon

    This Afternoon: A 20 percent chance of rain. Mostly cloudy, with a high near 49. South wind around 10 mph.

    High: 49 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Southwest wind around 8 mph.

    Low: 32 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 49. West wind around 10 mph, with gusts as high as 20 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 50. South wind around 6 mph.

    High: 50 °F

    Mostly Cloudy

  • Friday Night

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

    Low: 31 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 44.

    High: 44 °F

    Mostly Cloudy

  • Saturday Night

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

    Low: 30 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 45.

    High: 45 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A 20 percent chance of rain. Mostly cloudy, with a high near 49. South wind around 10 mph.
Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 32. Southwest wind around 8 mph.
Thursday
Mostly sunny, with a high near 49. West wind around 10 mph, with gusts as high as 20 mph.
Thursday Night
Mostly cloudy, with a low around 33. Southwest wind around 8 mph.
Friday
Mostly cloudy, with a high near 50. South wind around 6 mph.
Friday Night
Mostly cloudy, with a low around 31.
Saturday
Mostly cloudy, with a high near 44.
Saturday Night
Mostly cloudy, with a low around 30.
Sunday
Partly sunny, with a high near 45.
Sunday Night
A slight chance of rain after 4am. Mostly cloudy, with a low around 32.
Monday
A slight chance of rain. Mostly cloudy, with a high near 48.
Monday Night
Mostly cloudy, with a low around 35.
Tuesday
Mostly cloudy, with a high near 48.
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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:
1:31 pm PST Jan 7, 2026
Forecast Valid:
2pm PST Jan 7, 2026-6pm PST Jan 13, 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