Turtle Lake, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Turtle Lake, a community in Lake County, Montana.
Overnight
45°F
Mostly Clear
Mostly clear, with a low around 45. East southeast wind around 1 mph.
7-day forecast for Turtle Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 45°F | Mostly Clear | 1 mph ESE | 0% |
| Tuesday | 80°F | Sunny | 1 to 5 mph N | 0% |
| Tuesday Night | 49°F | Mostly Clear | 3 mph ESE | 0% |
| Wednesday | 87°F | Sunny | 3 mph SW | 0% |
| Wednesday Night | 52°F | Mostly Clear | 3 mph SE | 0% |
| Thursday | 94°F | Sunny | 1 to 5 mph S | 0% |
| Thursday Night | 55°F | Mostly Clear | 1 to 5 mph S | 0% |
| Friday | 96°F | Sunny | 1 to 7 mph SSW | 0% |
| Friday Night | 55°F | Clear | 5 to 14 mph SSW | 0% |
| Saturday | 93°F | Sunny | 3 to 10 mph SSW | 0% |
| Saturday Night | 54°F | Mostly Clear | 2 to 12 mph SSW | 0% |
| Sunday | 89°F | Sunny | 1 to 5 mph SW | 0% |
| Sunday Night | 54°F | Mostly Clear | 1 to 6 mph N | 0% |
| Monday | 88°F | Sunny | 1 to 5 mph NNW | 0% |
Forecast source: National Weather Service (api.weather.gov) for Turtle Lake (47.670, -114.086). Updated through the day.
Growing snapshot for Turtle Lake
Last spring frost
May 10
First fall frost
Oct 5
Growing season
147 days
Hardiness zone
6a
More local growing data for Turtle Lake: nearby ZIP 59855 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
Bear Dance
Big Arm
Charlo
Dayton
Elmo
Finley Point
Jette
Kerr
Kicking Horse
Kings Point
Lake Mary Ronan
Lindisfarne
Niarada
Pablo
Polson
Ravalli
Rocky Point
Rollins
Ronan
St. Ignatius
Swan Lake
Climate data from the nearest NOAA station, Polson, Mt (6.2 mi from Turtle Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.