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
44°F
Partly Sunny
Partly sunny, with a high near 44. North wind around 2 mph.
7-day forecast for Turtle Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 44°F | Partly Sunny | 2 mph N | 0% |
| Tonight | 28°F | Patchy Fog | 0 mph | 0% |
| Wednesday | 46°F | Partly Sunny | 1 mph W | 0% |
| Wednesday Night | 28°F | Partly Cloudy | 1 mph SSE | 1% |
| Thursday | 46°F | Partly Sunny then Slight Chance Light Rain | 1 to 6 mph SSW | 20% |
| Thursday Night | 31°F | Slight Chance Light Rain then Mostly Cloudy | 6 mph S | 20% |
| Friday | 48°F | Partly Sunny then Slight Chance Light Rain | 5 to 8 mph S | 24% |
| Friday Night | 34°F | Slight Chance Light Rain | 5 to 9 mph S | 24% |
| Saturday | 52°F | Partly Sunny | 1 to 5 mph S | 4% |
| Saturday Night | 34°F | Mostly Cloudy | 3 mph SE | 12% |
| Sunday | 57°F | Slight Chance Light Rain | 3 to 8 mph SSW | 21% |
| Sunday Night | 36°F | Slight Chance Light Rain then Mostly Cloudy | 2 to 6 mph SSW | 21% |
| Monday | 53°F | Slight Chance Light Rain | 2 mph SSW | 15% |
| Monday Night | 36°F | Slight Chance Light Rain | 2 mph S | 19% |
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 Nov 4, 2026.