Coulee City, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Coulee City, a town in Douglas County, Washington.
Overnight
58°F
Areas Of Smoke
Areas of smoke before 4am, then haze and areas of smoke. Mostly clear. Low around 58, with temperatures rising to around 62 overnight. North wind 9 to 16 mph.
7-day forecast for Coulee City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 58°F | Areas Of Smoke | 9 to 16 mph N | 0% |
| Tuesday | 84°F | Haze then Sunny | 3 to 15 mph NW | 0% |
| Tuesday Night | 62°F | Haze | 3 to 7 mph N | 0% |
| Wednesday | 89°F | Sunny | 3 to 8 mph W | 0% |
| Wednesday Night | 65°F | Mostly Clear | 5 to 9 mph W | 0% |
| Thursday | 92°F | Sunny | 3 to 10 mph SW | 0% |
| Thursday Night | 68°F | Mostly Clear | 5 to 10 mph W | 0% |
| Friday | 92°F | Sunny | 5 to 20 mph W | 0% |
| Friday Night | 66°F | Mostly Clear | 8 to 20 mph W | 0% |
| Saturday | 88°F | Sunny | 7 to 16 mph W | 0% |
| Saturday Night | 64°F | Mostly Clear | 12 to 17 mph W | 0% |
| Sunday | 85°F | Sunny | 6 to 12 mph W | 0% |
| Sunday Night | 62°F | Mostly Clear | 10 mph W | 0% |
| Monday | 84°F | Sunny | 5 to 9 mph W | 0% |
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 Aug 4, 2026.