Soap Lake, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Soap Lake, a city in Grant County, Washington.
Overnight
51°F
Mostly Clear
Mostly clear. Low around 51, with temperatures rising to around 53 overnight. North wind around 5 mph.
7-day forecast for Soap Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 51°F | Mostly Clear | 5 mph N | 0% |
| Saturday | 80°F | Mostly Sunny | 2 to 7 mph E | 0% |
| Saturday Night | 51°F | Mostly Clear | 1 to 6 mph NW | 0% |
| Sunday | 82°F | Sunny | 6 mph SE | 0% |
| Sunday Night | 52°F | Mostly Clear | 1 to 6 mph W | 0% |
| Monday | 82°F | Sunny | 2 to 8 mph SW | 0% |
| Monday Night | 53°F | Partly Cloudy | 2 to 8 mph W | 0% |
| Tuesday | 78°F | Mostly Sunny | 1 to 8 mph NW | 0% |
| Tuesday Night | 50°F | Partly Cloudy | 3 to 8 mph W | 0% |
| Wednesday | 74°F | Mostly Sunny | 3 to 9 mph NW | 1% |
| Wednesday Night | 49°F | Mostly Cloudy | 5 to 9 mph W | 1% |
| Thursday | 72°F | Partly Sunny | 6 mph N | 4% |
| Thursday Night | 49°F | Mostly Cloudy | 5 to 8 mph NW | 8% |
| Friday | 69°F | Mostly Sunny | 10 mph NW | 7% |
Forecast source: National Weather Service (api.weather.gov) for Soap Lake (47.391, -119.485). Updated through the day.
Growing snapshot for Soap Lake
Last spring frost
Apr 22
First fall frost
Oct 17
Growing season
175 days
Hardiness zone
7a
More local growing data for Soap Lake: nearby ZIP 98851 weather · frost dates · planting calendar · Washington frost dates
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Climate data from the nearest NOAA station, Ephrata Muni Ap, Wa (8.3 mi from Soap Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.