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.

haze

79°F

26°C

Humidity 22%
Wind Speed SSW 11 MPH
Barometer 29.63 in (1003.39 mb)
Dewpoint 37°F (3°C)
Visibility 4.00 mi
Heat Index78°F (26°C)
Last update 25 May 02:15 PM PDT
Extended Forecast for

Coulee City WA

  • Memorial Day

    Memorial Day: Partly sunny, with a high near 74. Breezy, with a southwest wind 18 to 20 mph, with gusts as high as 31 mph.

    High: 74 °F

    Partly Sunny
    and Breezy

  • Tonight

    Tonight: Showers likely. Cloudy, with a low around 51. Breezy, with a west wind 17 to 22 mph becoming south 10 to 15 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 51 °F

    Showers
    Likely and
    Breezy

  • Tuesday

    Tuesday: A 20 percent chance of showers before 11am. Mostly cloudy, with a high near 65. South wind 5 to 7 mph becoming light and variable.

    High: 65 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Tuesday Night

    Tuesday Night: A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 54. Northwest wind 7 to 9 mph.

    Low: 54 °F

    Slight Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny, with a high near 79. North wind 7 to 11 mph.

    High: 79 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 58.

    Low: 58 °F

    Slight Chance
    Showers then
    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 82.

    High: 82 °F

    Sunny

  • Thursday Night

    Thursday Night: A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.

    Low: 57 °F

    Chance
    T-storms

  • Friday

    Friday: A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 78. Chance of precipitation is 50%.

    High: 78 °F

    Chance
    Showers

Detailed Forecast

Memorial Day
Partly sunny, with a high near 74. Breezy, with a southwest wind 18 to 20 mph, with gusts as high as 31 mph.
Tonight
Showers likely. Cloudy, with a low around 51. Breezy, with a west wind 17 to 22 mph becoming south 10 to 15 mph after midnight. Winds could gust as high as 30 mph. Chance of precipitation is 70%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday
A 20 percent chance of showers before 11am. Mostly cloudy, with a high near 65. South wind 5 to 7 mph becoming light and variable.
Tuesday Night
A 20 percent chance of showers after 11pm. Mostly cloudy, with a low around 54. Northwest wind 7 to 9 mph.
Wednesday
Mostly sunny, with a high near 79. North wind 7 to 11 mph.
Wednesday Night
A 20 percent chance of showers before 11pm. Partly cloudy, with a low around 58.
Thursday
Sunny, with a high near 82.
Thursday Night
A 50 percent chance of showers and thunderstorms. Mostly cloudy, with a low around 57.
Friday
A chance of showers, with thunderstorms also possible after 11am. Partly sunny, with a high near 78. Chance of precipitation is 50%.
Friday Night
A 20 percent chance of showers before 11pm. Mostly cloudy, with a low around 49.
Saturday
Mostly sunny, with a high near 71.
Saturday Night
Mostly clear, with a low around 45.
Sunday
Mostly sunny, with a high near 72.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Coulee City WA
 47.61°N 119.28°W (Elev. 1624 ft)
Last Update:
2:07 pm PDT May 25, 2026
Forecast Valid:
2pm PDT May 25, 2026-6pm PDT May 31, 2026
 
Forecast Discussion
 
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Additional Resources

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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