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

61°F

16°C

Humidity 23%
Wind Speed SSW 3 MPH
Barometer 29.93 in (1013.55 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Last update 08 Apr 06:35 PM PDT
Extended Forecast for

Grand Coulee WA

  • Tonight

    Tonight: Mostly clear, with a low around 41. Southwest wind around 6 mph becoming light and variable.

    Low: 41 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 68. North wind 5 to 7 mph becoming east in the afternoon.

    High: 68 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 43. North wind 3 to 6 mph.

    Low: 43 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 71. North wind around 5 mph becoming southeast in the afternoon.

    High: 71 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 50. Southeast wind around 6 mph becoming northwest in the evening.

    Low: 50 °F

    Mostly Cloudy

  • Saturday

    Saturday: A chance of showers, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 65. Chance of precipitation is 40%.

    High: 65 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 11pm, then a chance of rain after 11pm. Mostly cloudy, with a low around 47. Chance of precipitation is 40%.

    Low: 47 °F

    Chance
    Showers

  • Sunday

    Sunday: A chance of rain before 11am, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 58. Chance of precipitation is 50%.

    High: 58 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 44.

    Low: 44 °F

    Chance Rain
    then Mostly
    Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 41. Southwest wind around 6 mph becoming light and variable.
Thursday
Sunny, with a high near 68. North wind 5 to 7 mph becoming east in the afternoon.
Thursday Night
Mostly clear, with a low around 43. North wind 3 to 6 mph.
Friday
Mostly sunny, with a high near 71. North wind around 5 mph becoming southeast in the afternoon.
Friday Night
Mostly cloudy, with a low around 50. Southeast wind around 6 mph becoming northwest in the evening.
Saturday
A chance of showers, with thunderstorms also possible after 11am. Mostly cloudy, with a high near 65. Chance of precipitation is 40%.
Saturday Night
A chance of showers and thunderstorms before 11pm, then a chance of rain after 11pm. Mostly cloudy, with a low around 47. Chance of precipitation is 40%.
Sunday
A chance of rain before 11am, then a chance of showers and thunderstorms after 11am. Partly sunny, with a high near 58. Chance of precipitation is 50%.
Sunday Night
A 30 percent chance of rain before 11pm. Mostly cloudy, with a low around 44.
Monday
Partly sunny, with a high near 61.
Monday Night
Mostly cloudy, with a low around 41.
Tuesday
Partly sunny, with a high near 60.
Tuesday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 43.
Wednesday
A 20 percent chance of rain. Partly sunny, with a high near 59.
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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:
2:06 pm PDT Apr 8, 2026
Forecast Valid:
6pm PDT Apr 8, 2026-6pm PDT Apr 15, 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