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

57°F

14°C

Humidity 54%
Wind Speed N 0 MPH
Barometer 29.89 in (1012.19 mb)
Dewpoint 41°F (5°C)
Visibility 5.00 mi
Last update 09 Oct 08:15 PM PDT
Extended Forecast for

Hartline WA

  • Tonight

    Tonight: Mostly clear, with a low around 52. Northeast wind 6 to 14 mph.

    Low: 52 °F

    Mostly Clear

  • Friday

    Friday: A 30 percent chance of showers, mainly between 8am and 11am. Cloudy, then gradually becoming mostly sunny, with a high near 72. Northeast wind 10 to 16 mph becoming south in the afternoon. Winds could gust as high as 25 mph.

    High: 72 °F

    Chance
    Showers

  • Friday Night

    Friday Night: A 30 percent chance of showers, mainly before 11pm. Partly cloudy, with a low around 43. South wind 9 to 11 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 43 °F

    Chance
    Showers

  • Saturday

    Saturday: A 30 percent chance of showers, mainly after 11am. Partly sunny, with a high near 60. Southwest wind 10 to 15 mph. New precipitation amounts of less than a tenth of an inch possible.

    High: 60 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: A 50 percent chance of showers. Mostly cloudy, with a low around 41. West wind around 15 mph. New precipitation amounts of less than a tenth of an inch possible.

    Low: 41 °F

    Chance
    Showers

  • Sunday

    Sunday: A 40 percent chance of showers. Partly sunny, with a high near 56.

    High: 56 °F

    Chance
    Showers

  • Sunday Night

    Sunday Night: Showers likely. Mostly cloudy, with a low around 40. Chance of precipitation is 70%.

    Low: 40 °F

    Showers
    Likely

  • Columbus Day

    Columbus Day: A 40 percent chance of showers, mainly before 11am. Partly sunny, with a high near 52. Breezy.

    High: 52 °F

    Chance
    Showers and
    Breezy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 52. Northeast wind 6 to 14 mph.
Friday
A 30 percent chance of showers, mainly between 8am and 11am. Cloudy, then gradually becoming mostly sunny, with a high near 72. Northeast wind 10 to 16 mph becoming south in the afternoon. Winds could gust as high as 25 mph.
Friday Night
A 30 percent chance of showers, mainly before 11pm. Partly cloudy, with a low around 43. South wind 9 to 11 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A 30 percent chance of showers, mainly after 11am. Partly sunny, with a high near 60. Southwest wind 10 to 15 mph. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
A 50 percent chance of showers. Mostly cloudy, with a low around 41. West wind around 15 mph. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A 40 percent chance of showers. Partly sunny, with a high near 56.
Sunday Night
Showers likely. Mostly cloudy, with a low around 40. Chance of precipitation is 70%.
Columbus Day
A 40 percent chance of showers, mainly before 11am. Partly sunny, with a high near 52. Breezy.
Monday Night
Partly cloudy, with a low around 36.
Tuesday
Sunny, with a high near 59.
Tuesday Night
Partly cloudy, with a low around 38.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
Mostly clear, with a low around 37.
Thursday
Sunny, with a high near 61.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hartline WA
 47.7°N 119.12°W (Elev. 1991 ft)
Last Update:
4:16 pm PDT Oct 9, 2025
Forecast Valid:
8pm PDT Oct 9, 2025-6pm PDT Oct 16, 2025
 
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