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

64°F

18°C

Humidity 55%
Wind Speed SSW 11 MPH
Barometer 29.9 in (1012.53 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 17 Mar 03:55 PM PDT
Extended Forecast for

Grand Coulee WA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 65. Southwest wind around 13 mph, with gusts as high as 22 mph.

    High: 65 °F

    Partly Sunny

  • Tonight

    Tonight: A 30 percent chance of rain, mainly between 11pm and 2am. Mostly cloudy, with a low around 50. South wind 7 to 10 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 50 °F

    Chance Rain

  • Wednesday

    Wednesday: Partly sunny, with a high near 66. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.

    High: 66 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 51. South wind 8 to 11 mph.

    Low: 51 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 68. South wind 8 to 14 mph, with gusts as high as 23 mph.

    High: 68 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 52.

    Low: 52 °F

    Mostly Cloudy

  • Friday

    Friday: A 30 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 68.

    High: 68 °F

    Chance Rain

  • Friday Night

    Friday Night: A 20 percent chance of rain. Mostly cloudy, with a low around 43.

    Low: 43 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: Sunny, with a high near 56.

    High: 56 °F

    Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 65. Southwest wind around 13 mph, with gusts as high as 22 mph.
Tonight
A 30 percent chance of rain, mainly between 11pm and 2am. Mostly cloudy, with a low around 50. South wind 7 to 10 mph. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Partly sunny, with a high near 66. Southwest wind 9 to 14 mph, with gusts as high as 23 mph.
Wednesday Night
Mostly cloudy, with a low around 51. South wind 8 to 11 mph.
Thursday
Partly sunny, with a high near 68. South wind 8 to 14 mph, with gusts as high as 23 mph.
Thursday Night
Mostly cloudy, with a low around 52.
Friday
A 30 percent chance of rain, mainly after 11am. Mostly cloudy, with a high near 68.
Friday Night
A 20 percent chance of rain. Mostly cloudy, with a low around 43.
Saturday
Sunny, with a high near 56.
Saturday Night
Mostly clear, with a low around 34.
Sunday
Mostly sunny, with a high near 54.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Partly sunny, with a high near 57.
Monday Night
A chance of rain and snow. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
Tuesday
A chance of rain and snow. Partly sunny, with a high near 56. Chance of precipitation is 50%.
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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:
3:22 pm PDT Mar 17, 2026
Forecast Valid:
4pm PDT Mar 17, 2026-6pm PDT Mar 24, 2026
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation