Loon Lake, WA Weather & Growing Conditions
Tonight
51°F
Mostly Clear
Mostly clear, with a low around 51. North wind around 1 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Tonight | 51°F | Mostly Clear | 1 mph N | 0% |
| Saturday | 74°F | Sunny | 0 to 3 mph S | 0% |
| Saturday Night | 51°F | Partly Cloudy | 1 mph NE | 0% |
| Sunday | 75°F | Sunny | 3 mph SE | 0% |
| Sunday Night | 52°F | Mostly Clear | 2 mph N | 0% |
| Monday | 76°F | Sunny | 5 mph SE | 0% |
| Monday Night | 53°F | Partly Cloudy | 0 to 3 mph E | 0% |
| Tuesday | 72°F | Mostly Sunny | 1 to 5 mph S | 1% |
| Tuesday Night | 51°F | Partly Cloudy | 3 mph S | 1% |
| Wednesday | 69°F | Mostly Sunny | 1 to 5 mph SE | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 3 mph S | 1% |
| Thursday | 72°F | Mostly Sunny | 3 mph E | 3% |
| Thursday Night | 51°F | Mostly Cloudy | 3 mph NE | 9% |
| Friday | 68°F | Partly Sunny | 2 to 6 mph S | 14% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Loon Lake, WA
Last spring frost
May 22
First fall frost
Sep 14
Growing season
112 days
Hardiness zone
6a
Explore more for Loon Lake, WA: full frost dates · planting calendar · Washington frost dates
Climate data from the nearest NOAA station, Deer Park Ap, Wa (11.3 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.