Coulee City, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coulee City, a town in Douglas County, Washington.
This Afternoon
76°F
Sunny
Sunny, with a high near 76. South wind 3 to 8 mph.
7-day forecast for Coulee City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 76°F | Sunny | 3 to 8 mph S | 0% |
| Tonight | 57°F | Mostly Clear | 3 to 8 mph SE | 0% |
| Sunday | 79°F | Sunny | 3 to 7 mph SE | 0% |
| Sunday Night | 58°F | Mostly Clear | 3 to 10 mph N | 0% |
| Monday | 80°F | Sunny | 3 to 10 mph SE | 0% |
| Monday Night | 59°F | Partly Cloudy | 5 to 9 mph W | 0% |
| Tuesday | 76°F | Mostly Sunny | 3 to 10 mph W | 0% |
| Tuesday Night | 54°F | Partly Cloudy | 6 to 10 mph W | 0% |
| Wednesday | 71°F | Mostly Sunny | 5 to 13 mph W | 0% |
| Wednesday Night | 53°F | Partly Cloudy | 7 to 13 mph W | 1% |
| Thursday | 67°F | Partly Sunny | 7 mph NW | 6% |
| Thursday Night | 53°F | Mostly Cloudy | 6 to 12 mph NW | 8% |
| Friday | 65°F | Partly Sunny | 14 mph NW | 9% |
| Friday Night | 50°F | Mostly Cloudy | 14 mph NW | 10% |
Forecast source: National Weather Service (api.weather.gov) for Coulee City (47.612, -119.290). Updated through the day.
Growing snapshot for Coulee City
Last spring frost
May 2
First fall frost
Oct 12
Growing season
162 days
Hardiness zone
6b
More local growing data for Coulee City: nearby ZIP 99115 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Climate data from the nearest NOAA station, Hartline, Wa (12.7 mi from Coulee City). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.