National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Excessive Rainfall Possible This Weekend; October Heat Wave in California

A slow moving front will be the focus area for heavy to excessive rainfall and a threat for flash/urban flooding across the northern Gulf Coast and Southeast U.S. through this weekend. Abnormally hot, potentially record-breaking, temperatures will impact southern California and stretch north toward the Bay Area and Central Valley into next week. Read More >

Current conditions at

Grand Coulee Dam Airport (K3W7)

Lat: 47.92205°NLon: 119.083°WElev: 1593.0ft.

Clear

55°F

13°C

Humidity 76%
Wind Speed N 0 MPH
Barometer 30.11 in (1019.64 mb)
Dewpoint 48°F (9°C)
Visibility 10.00 mi
Last update 04 Oct 02:15 AM PDT
Extended Forecast for

Hartline WA

  • Overnight

    Overnight: Mostly clear, with a low around 50. North wind around 11 mph.

    Low: 50 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 78. North wind 5 to 9 mph becoming calm in the afternoon.

    High: 78 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 49. Light and variable wind becoming west around 5 mph after midnight.

    Low: 49 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 78. Northeast wind 5 to 7 mph becoming west in the afternoon.

    High: 78 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 48. West wind 5 to 8 mph becoming north after midnight.

    Low: 48 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Tuesday Night

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

    Low: 48 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 49.

    Low: 49 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly clear, with a low around 50. North wind around 11 mph.
Sunday
Sunny, with a high near 78. North wind 5 to 9 mph becoming calm in the afternoon.
Sunday Night
Partly cloudy, with a low around 49. Light and variable wind becoming west around 5 mph after midnight.
Monday
Mostly sunny, with a high near 78. Northeast wind 5 to 7 mph becoming west in the afternoon.
Monday Night
Partly cloudy, with a low around 48. West wind 5 to 8 mph becoming north after midnight.
Tuesday
Sunny, with a high near 76.
Tuesday Night
Mostly clear, with a low around 48.
Wednesday
Sunny, with a high near 76.
Wednesday Night
Mostly clear, with a low around 49.
Thursday
Sunny, with a high near 76.
Thursday Night
Partly cloudy, with a low around 50.
Friday
Partly sunny, with a high near 72. Breezy.
Friday Night
Partly cloudy, with a low around 45. Breezy.
Saturday
Mostly sunny, with a high near 62. Breezy.
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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:
2:06 am PDT Oct 4, 2026
Forecast Valid:
2am PDT Oct 4, 2026-6pm PDT Oct 10, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

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