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.

Partly Cloudy

63°F

17°C

Humidity 55%
Wind Speed SSW 12 MPH
Barometer 29.95 in (1014.22 mb)
Dewpoint 46°F (8°C)
Visibility 10.00 mi
Last update 18 Mar 06:35 PM PDT
Extended Forecast for

Grand Coulee WA

  • Tonight

    Tonight: A 10 percent chance of rain after 5am. Cloudy, with a low around 52. Southwest wind 10 to 14 mph.

    Low: 52 °F

    Cloudy then
    Slight Chance
    Rain

  • Thursday

    Thursday: A 20 percent chance of rain before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 69. Southwest wind 11 to 17 mph.

    High: 69 °F

    Slight Chance
    Rain then
    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 52. South wind 8 to 14 mph.

    Low: 52 °F

    Slight Chance
    Rain

  • Friday

    Friday: A 40 percent chance of rain. Mostly cloudy, with a high near 66. Southwest wind 8 to 16 mph.

    High: 66 °F

    Chance Rain

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40. Southwest wind 13 to 17 mph.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 56.

    High: 56 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 33.

    Low: 33 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 55.

    High: 55 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A 10 percent chance of rain after 5am. Cloudy, with a low around 52. Southwest wind 10 to 14 mph.
Thursday
A 20 percent chance of rain before 8am. Cloudy, then gradually becoming mostly sunny, with a high near 69. Southwest wind 11 to 17 mph.
Thursday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 52. South wind 8 to 14 mph.
Friday
A 40 percent chance of rain. Mostly cloudy, with a high near 66. Southwest wind 8 to 16 mph.
Friday Night
Mostly cloudy, with a low around 40. Southwest wind 13 to 17 mph.
Saturday
Mostly sunny, with a high near 56.
Saturday Night
Mostly clear, with a low around 33.
Sunday
Sunny, with a high near 55.
Sunday Night
Mostly cloudy, with a low around 36.
Monday
Mostly cloudy, with a high near 56.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Rain likely. Mostly cloudy, with a high near 54. Chance of precipitation is 60%.
Tuesday Night
A chance of rain and snow. Mostly cloudy, with a low around 37. Chance of precipitation is 50%.
Wednesday
A chance of rain and snow. Partly sunny, with a high near 53. Chance of precipitation is 30%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Grand Coulee WA
 47.94°N 119.02°W (Elev. 1601 ft)
Last Update:
4:12 pm PDT Mar 18, 2026
Forecast Valid:
7pm PDT Mar 18, 2026-6pm PDT Mar 25, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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