Loon Lake, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Loon Lake, a community in Stevens County, Washington.
Today
84°F
Sunny
Sunny, with a high near 84. Northwest wind 0 to 3 mph.
7-day forecast for Loon Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 84°F | Sunny | 0 to 3 mph NW | 0% |
| Tonight | 52°F | Haze then Smoke | 0 to 3 mph N | 0% |
| Wednesday | 88°F | Areas Of Smoke | 0 to 6 mph S | 0% |
| Wednesday Night | 56°F | Smoke then Mostly Clear | 0 to 6 mph SW | 0% |
| Thursday | 93°F | Sunny | 0 to 7 mph S | 0% |
| Thursday Night | 59°F | Mostly Clear | 0 to 7 mph S | 0% |
| Friday | 92°F | Sunny | 1 to 9 mph S | 0% |
| Friday Night | 58°F | Mostly Clear | 0 to 9 mph SW | 0% |
| Saturday | 89°F | Sunny | 0 to 9 mph S | 0% |
| Saturday Night | 56°F | Mostly Clear | 1 to 9 mph S | 0% |
| Sunday | 85°F | Sunny | 1 to 7 mph S | 0% |
| Sunday Night | 54°F | Mostly Clear | 1 to 7 mph SW | 0% |
| Monday | 84°F | Sunny | 1 to 6 mph S | 0% |
| Monday Night | 54°F | Mostly Clear | 1 to 6 mph SE | 0% |
Forecast source: National Weather Service (api.weather.gov) for Loon Lake (48.070, -117.626). Updated through the day.
Growing snapshot for Loon Lake
Last spring frost
May 22
First fall frost
Sep 14
Growing season
112 days
Hardiness zone
6a
More local growing data for Loon Lake: nearby ZIP 99148 weather · frost dates · planting calendar · Washington frost dates
Nearby towns & communities
Addy
Barney's Junction
Chewelah
Clayton
Colville
Inchelium
Kettle Falls
Marcus
Northport
Springdale
Valley
Climate data from the nearest NOAA station, Deer Park Ap, Wa (11.3 mi from Loon Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.