Swan Lake, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Swan Lake, a community in Lake County, Montana.
This Afternoon
70°F
Mostly Sunny
Mostly sunny, with a high near 70. West southwest wind around 2 mph.
7-day forecast for Swan Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| This Afternoon | 70°F | Mostly Sunny | 2 mph WSW | 13% |
| Tonight | 46°F | Partly Cloudy | 0 to 3 mph ESE | 3% |
| Sunday | 70°F | Sunny | 0 to 3 mph S | 1% |
| Sunday Night | 46°F | Mostly Clear | 2 mph SSE | 0% |
| Monday | 72°F | Sunny | 3 mph SW | 0% |
| Monday Night | 48°F | Mostly Clear | 2 mph SSE | 0% |
| Tuesday | 72°F | Sunny | 0 to 3 mph SSW | 0% |
| Tuesday Night | 49°F | Partly Cloudy | 3 mph S | 1% |
| Wednesday | 70°F | Mostly Sunny | 2 to 7 mph SE | 0% |
| Wednesday Night | 47°F | Partly Cloudy | 3 mph SSW | 8% |
| Thursday | 68°F | Mostly Sunny | 3 mph S | 1% |
| Thursday Night | 48°F | Partly Cloudy | 1 to 5 mph ENE | 11% |
| Friday | 66°F | Mostly Sunny | 5 mph SSE | 12% |
| Friday Night | 45°F | Slight Chance Light Rain | 5 mph ESE | 21% |
Forecast source: National Weather Service (api.weather.gov) for Swan Lake (47.936, -113.800). Updated through the day.
Growing snapshot for Swan Lake
Last spring frost
May 17
First fall frost
Sep 19
Growing season
121 days
Hardiness zone
5b
More local growing data for Swan Lake: nearby ZIP 59911 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
Turtle Lake
Climate data from the nearest NOAA station, Swan Lake, Mt (4.2 mi from Swan Lake). Frost dates are 1991–2020 averages, not a forecast. Page updated Sep 19, 2026.