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
76°F
Sunny
Sunny, with a high near 76. South wind 0 to 3 mph.
7-day forecast for Loon Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 76°F | Sunny | 0 to 3 mph S | 0% |
| Tonight | 49°F | Partly Cloudy | 1 mph E | 0% |
| Sunday | 77°F | Sunny | 2 mph SE | 0% |
| Sunday Night | 49°F | Mostly Clear | 2 mph NE | 0% |
| Monday | 78°F | Sunny | 5 mph SE | 0% |
| Monday Night | 50°F | Partly Cloudy | 0 to 3 mph N | 0% |
| Tuesday | 75°F | Mostly Sunny | 1 to 5 mph S | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 0 to 5 mph S | 0% |
| Wednesday | 71°F | Mostly Sunny | 1 to 6 mph S | 0% |
| Wednesday Night | 48°F | Mostly Cloudy | 0 to 6 mph S | 1% |
| Thursday | 70°F | Partly Sunny | 3 mph SE | 2% |
| Thursday Night | 48°F | Mostly Cloudy | 3 mph N | 11% |
| Friday | 66°F | Partly Sunny then Slight Chance Rain Showers | 5 mph S | 16% |
| Friday Night | 45°F | Slight Chance Rain Showers then Mostly Cloudy | 5 mph NW | 16% |
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 Sep 19, 2026.