Turtle Lake, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Turtle Lake, a community in Lake County, Montana.
This Afternoon
73°F
Mostly Sunny
Mostly sunny, with a high near 73. West wind 5 to 8 mph.
7-day forecast for Turtle Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 73°F | Mostly Sunny | 5 to 8 mph W | 3% |
| Tonight | 49°F | Mostly Cloudy | 2 mph NE | 12% |
| Saturday | 73°F | Patchy Fog then Mostly Sunny | 0 to 3 mph N | 8% |
| Saturday Night | 48°F | Partly Cloudy | 3 mph ESE | 0% |
| Sunday | 75°F | Sunny | 3 mph SSW | 0% |
| Sunday Night | 49°F | Clear | 3 mph SE | 0% |
| Monday | 77°F | Sunny | 0 to 3 mph S | 0% |
| Monday Night | 50°F | Mostly Clear | 2 mph SSE | 0% |
| Tuesday | 75°F | Sunny | 2 mph SSE | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 2 mph ESE | 1% |
| Wednesday | 73°F | Sunny | 1 to 5 mph SSW | 1% |
| Wednesday Night | 49°F | Partly Cloudy | 2 mph S | 4% |
| Thursday | 75°F | Mostly Sunny | 2 mph SW | 2% |
| Thursday Night | 49°F | Partly Cloudy | 2 mph ENE | 1% |
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
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Dayton
Elmo
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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 Sep 18, 2026.