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

Grand Coulee Dam Airport (K3W7)

Lat: 47.92205°NLon: 119.083°WElev: 1593.0ft.

Clear

55°F

13°C

Humidity 35%
Wind Speed N 0 MPH
Barometer 29.99 in (1015.58 mb)
Dewpoint 28°F (-2°C)
Visibility 10.00 mi
Last update 28 Mar 11:55 AM PDT
Extended Forecast for

Grand Coulee WA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 61. West wind 6 to 10 mph.

    High: 61 °F

    Partly Sunny

  • Tonight

    Tonight: Partly cloudy, with a low around 38. West wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 18 mph.

    Low: 38 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 55. Southwest wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.

    High: 55 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy during the early evening, then gradual clearing, with a low around 32. Breezy, with a west wind 13 to 18 mph, with gusts as high as 30 mph.

    Low: 32 °F

    Mostly Cloudy
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Sunny, with a high near 51. Northwest wind 10 to 13 mph.

    High: 51 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 53.

    High: 53 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow after 5am. Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy
    then Chance
    Snow

  • Wednesday

    Wednesday: A chance of rain and snow before 11am, then rain likely. Mostly cloudy, with a high near 50. Chance of precipitation is 60%.

    High: 50 °F

    Rain/Snow
    Likely then
    Rain Likely

Detailed Forecast

This Afternoon
Partly sunny, with a high near 61. West wind 6 to 10 mph.
Tonight
Partly cloudy, with a low around 38. West wind 5 to 10 mph becoming southwest after midnight. Winds could gust as high as 18 mph.
Sunday
Mostly cloudy, with a high near 55. Southwest wind 5 to 10 mph increasing to 12 to 17 mph in the afternoon. Winds could gust as high as 28 mph.
Sunday Night
Mostly cloudy during the early evening, then gradual clearing, with a low around 32. Breezy, with a west wind 13 to 18 mph, with gusts as high as 30 mph.
Monday
Sunny, with a high near 51. Northwest wind 10 to 13 mph.
Monday Night
Partly cloudy, with a low around 32.
Tuesday
Partly sunny, with a high near 53.
Tuesday Night
A 30 percent chance of snow after 5am. Mostly cloudy, with a low around 37.
Wednesday
A chance of rain and snow before 11am, then rain likely. Mostly cloudy, with a high near 50. Chance of precipitation is 60%.
Wednesday Night
Rain likely before 2am, then a chance of rain and snow. Mostly cloudy, with a low around 36. Chance of precipitation is 60%.
Thursday
A chance of rain and snow. Partly sunny, with a high near 53. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 34.
Friday
Sunny, with a high near 58.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Coulee WA
 47.94°N 119.02°W (Elev. 1601 ft)
Last Update:
11:46 am PDT Mar 28, 2026
Forecast Valid:
12pm PDT Mar 28, 2026-6pm PDT Apr 3, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation