Loon Lake, WA Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Loon Lake, a community in Stevens County, Washington.
Overnight
33°F
Partly Cloudy
Partly cloudy, with a low around 33. North wind around 1 mph.
7-day forecast for Loon Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 33°F | Partly Cloudy | 1 mph N | 2% |
| Wednesday | 50°F | Sunny | 0 to 3 mph SE | 2% |
| Wednesday Night | 33°F | Patchy Fog then Rain Showers Likely | 0 mph | 67% |
| Thursday | 47°F | Rain Showers Likely then Mostly Cloudy | 0 to 3 mph S | 67% |
| Thursday Night | 33°F | Mostly Cloudy | 1 mph E | 3% |
| Friday | 48°F | Mostly Cloudy | 1 to 5 mph SE | 5% |
| Friday Night | 34°F | Slight Chance Rain Showers | 3 mph E | 16% |
| Saturday | 54°F | Partly Sunny | 3 mph NE | 9% |
| Saturday Night | 37°F | Mostly Cloudy then Slight Chance Rain Showers | 3 mph E | 15% |
| Sunday | 53°F | Slight Chance Rain Showers then Mostly Cloudy | 3 to 9 mph S | 15% |
| Sunday Night | 35°F | Mostly Cloudy | 1 to 5 mph S | 3% |
| Monday | 51°F | Partly Sunny then Slight Chance Rain Showers | 3 mph NE | 15% |
| Monday Night | 35°F | Chance Rain Showers | 2 mph NE | 31% |
| Tuesday | 53°F | Chance Rain Showers | 3 mph SE | 31% |
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 Nov 4, 2026.