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

46°F

8°C

Humidity 56%
Wind Speed N 0 MPH
Barometer 29.96 in (1014.56 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 29 Mar 10:55 AM PDT
Extended Forecast for

Grand Coulee WA

  • Today

    Today: A 20 percent chance of rain. Mostly cloudy, with a high near 54. Southwest wind 9 to 17 mph, with gusts as high as 28 mph.

    High: 54 °F

    Slight Chance
    Rain

  • Tonight

    Tonight: A slight chance of rain, mixing with snow after 10pm, then gradually ending. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Breezy, with a west wind 13 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    Low: 31 °F

    Slight Chance
    Rain/Snow and
    Breezy then
    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 50. Northwest wind 8 to 13 mph.

    High: 50 °F

    Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 32. Northwest wind 5 to 7 mph becoming light and variable in the evening.

    Low: 32 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Partly sunny, with a high near 54. East wind around 6 mph becoming southeast in the afternoon.

    High: 54 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A 30 percent chance of snow after 5am. Mostly cloudy, with a low around 38. Little or no snow accumulation expected.

    Low: 38 °F

    Mostly Cloudy
    then Chance
    Snow

  • Wednesday

    Wednesday: A chance of rain and snow before 11am, then rain likely. Mostly cloudy, with a high near 49. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 49 °F

    Rain/Snow
    Likely then
    Rain Likely

  • Wednesday Night

    Wednesday Night: Rain. Low around 37. Chance of precipitation is 80%.

    Low: 37 °F

    Rain

  • Thursday

    Thursday: A 40 percent chance of rain. Partly sunny, with a high near 51.

    High: 51 °F

    Chance Rain

Detailed Forecast

Today
A 20 percent chance of rain. Mostly cloudy, with a high near 54. Southwest wind 9 to 17 mph, with gusts as high as 28 mph.
Tonight
A slight chance of rain, mixing with snow after 10pm, then gradually ending. Mostly cloudy, then gradually becoming mostly clear, with a low around 31. Breezy, with a west wind 13 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Monday
Sunny, with a high near 50. Northwest wind 8 to 13 mph.
Monday Night
Partly cloudy, with a low around 32. Northwest wind 5 to 7 mph becoming light and variable in the evening.
Tuesday
Partly sunny, with a high near 54. East wind around 6 mph becoming southeast in the afternoon.
Tuesday Night
A 30 percent chance of snow after 5am. Mostly cloudy, with a low around 38. Little or no snow accumulation expected.
Wednesday
A chance of rain and snow before 11am, then rain likely. Mostly cloudy, with a high near 49. Chance of precipitation is 70%. Little or no snow accumulation expected.
Wednesday Night
Rain. Low around 37. Chance of precipitation is 80%.
Thursday
A 40 percent chance of rain. Partly sunny, with a high near 51.
Thursday Night
Partly cloudy, with a low around 35.
Friday
Sunny, with a high near 59.
Friday Night
Partly cloudy, with a low around 36.
Saturday
Sunny, with a high near 62.
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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:
9:26 am PDT Mar 29, 2026
Forecast Valid:
11am PDT Mar 29, 2026-6pm PDT Apr 4, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation