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
41°F
Mostly Clear
Mostly clear. Low around 41, with temperatures rising to around 43 overnight. Northeast wind around 7 mph.
7-day forecast for Coulee City
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 41°F | Mostly Clear | 7 mph NE | 2% |
| Wednesday | 53°F | Sunny | 2 to 7 mph SE | 3% |
| Wednesday Night | 41°F | Chance Rain Showers | 6 mph SE | 40% |
| Thursday | 55°F | Mostly Sunny | 2 to 6 mph S | 4% |
| Thursday Night | 39°F | Partly Cloudy | 7 mph SE | 7% |
| Friday | 53°F | Mostly Cloudy | 8 mph SE | 7% |
| Friday Night | 41°F | Mostly Cloudy | 5 to 10 mph E | 7% |
| Saturday | 58°F | Partly Sunny | 6 to 10 mph NE | 5% |
| Saturday Night | 43°F | Mostly Cloudy then Slight Chance Rain Showers | 6 to 10 mph E | 15% |
| Sunday | 58°F | Slight Chance Rain Showers then Partly Sunny | 8 to 18 mph SW | 15% |
| Sunday Night | 41°F | Mostly Cloudy | 9 mph NW | 2% |
| Monday | 55°F | Partly Sunny then Slight Chance Rain Showers | 5 to 9 mph NE | 15% |
| Monday Night | 41°F | Slight Chance Rain Showers | 5 to 8 mph NE | 22% |
| Tuesday | 56°F | Slight Chance Rain Showers | 8 mph SE | 22% |
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 Nov 4, 2026.