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

43°F

6°C

Humidity 45%
Wind Speed E 6 MPH
Barometer 30.33 in (1027.09 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 15 Mar 04:15 PM PDT
Extended Forecast for

Grand Coulee WA

  • This Afternoon

    This Afternoon: A 30 percent chance of rain after 5pm. Mostly cloudy, with a high near 45. South wind around 8 mph.

    High: 45 °F

    Chance Rain

  • Tonight

    Tonight: A chance of rain and snow before 11pm, then a slight chance of snow after 5am. Cloudy, with a low around 35. East wind around 6 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 35 °F

    Chance
    Rain/Snow
    then Slight
    Chance Snow

  • Monday

    Monday: A slight chance of rain and snow before 8am, then a slight chance of rain between 8am and 2pm. Mostly cloudy, with a high near 55. Southeast wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 20%.

    High: 55 °F

    Slight Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 43. South wind around 8 mph.

    Low: 43 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 66. South wind 7 to 11 mph, with gusts as high as 20 mph.

    High: 66 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 48.

    Low: 48 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 66.

    High: 66 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 51.

    Low: 51 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: A 20 percent chance of rain. Mostly cloudy, with a high near 67.

    High: 67 °F

    Slight Chance
    Rain

Detailed Forecast

This Afternoon
A 30 percent chance of rain after 5pm. Mostly cloudy, with a high near 45. South wind around 8 mph.
Tonight
A chance of rain and snow before 11pm, then a slight chance of snow after 5am. Cloudy, with a low around 35. East wind around 6 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Monday
A slight chance of rain and snow before 8am, then a slight chance of rain between 8am and 2pm. Mostly cloudy, with a high near 55. Southeast wind 5 to 8 mph becoming southwest in the afternoon. Chance of precipitation is 20%.
Monday Night
Mostly cloudy, with a low around 43. South wind around 8 mph.
Tuesday
Partly sunny, with a high near 66. South wind 7 to 11 mph, with gusts as high as 20 mph.
Tuesday Night
Mostly cloudy, with a low around 48.
Wednesday
Mostly cloudy, with a high near 66.
Wednesday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 51.
Thursday
A 20 percent chance of rain. Mostly cloudy, with a high near 67.
Thursday Night
A 20 percent chance of rain after 11pm. Mostly cloudy, with a low around 51.
Friday
A 20 percent chance of rain. Mostly cloudy, with a high near 66.
Friday Night
Mostly cloudy, with a low around 44.
Saturday
Mostly sunny, with a high near 59.
Saturday Night
Mostly clear, with a low around 36.
Sunday
Sunny, with a high near 56.
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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:
3:21 pm PDT Mar 15, 2026
Forecast Valid:
4pm PDT Mar 15, 2026-6pm PDT Mar 22, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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