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.

Overcast

48°F

9°C

Humidity 49%
Wind Speed SW 6 MPH
Barometer 29.98 in (1015.24 mb)
Dewpoint 30°F (-1°C)
Visibility 10.00 mi
Wind Chill45°F (7°C)
Last update 21 Mar 06:35 AM PDT
Extended Forecast for

Grand Coulee WA

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 57. Southwest wind 6 to 13 mph becoming northwest in the morning. Winds could gust as high as 21 mph.

    High: 57 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 32. West wind 5 to 11 mph.

    Low: 32 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 54. Light south wind becoming southwest 5 to 10 mph in the morning.

    High: 54 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 36. Southwest wind 5 to 10 mph becoming light and variable after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Monday

    Monday: Partly sunny, with a high near 57. Calm wind becoming southwest around 6 mph in the afternoon.

    High: 57 °F

    Partly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 42.

    Low: 42 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Rain. High near 53. Chance of precipitation is 80%.

    High: 53 °F

    Rain

  • Tuesday Night

    Tuesday Night: A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 38.

    Low: 38 °F

    Chance Rain

  • Wednesday

    Wednesday: A slight chance of rain and snow. Mostly sunny, with a high near 55. Breezy. Chance of precipitation is 20%.

    High: 55 °F

    Slight Chance
    Rain/Snow and
    Breezy

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 57. Southwest wind 6 to 13 mph becoming northwest in the morning. Winds could gust as high as 21 mph.
Tonight
Mostly clear, with a low around 32. West wind 5 to 11 mph.
Sunday
Mostly sunny, with a high near 54. Light south wind becoming southwest 5 to 10 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 36. Southwest wind 5 to 10 mph becoming light and variable after midnight.
Monday
Partly sunny, with a high near 57. Calm wind becoming southwest around 6 mph in the afternoon.
Monday Night
Mostly cloudy, with a low around 42.
Tuesday
Rain. High near 53. Chance of precipitation is 80%.
Tuesday Night
A 40 percent chance of rain, mainly before 11pm. Mostly cloudy, with a low around 38.
Wednesday
A slight chance of rain and snow. Mostly sunny, with a high near 55. Breezy. Chance of precipitation is 20%.
Wednesday Night
Mostly clear, with a low around 34.
Thursday
Sunny, with a high near 53.
Thursday Night
Mostly clear, with a low around 33.
Friday
Sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Grand Coulee WA
 47.94°N 119.02°W (Elev. 1601 ft)
Last Update:
4:12 am PDT Mar 21, 2026
Forecast Valid:
6am PDT Mar 21, 2026-6pm PDT Mar 27, 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