Swan Lake, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Swan Lake, a community in Lake County, Montana.
Today
44°F
Sunny
Sunny. High near 44, with temperatures falling to around 39 in the afternoon. South southwest wind around 1 mph.
7-day forecast for Swan Lake
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 44°F | Sunny | 1 mph SSW | 0% |
| Tonight | 30°F | Mostly Clear | 1 mph S | 1% |
| Thursday | 39°F | Chance Rain And Snow | 0 to 3 mph SSW | 49% |
| Thursday Night | 32°F | Chance Rain And Snow | 3 mph SW | 49% |
| Friday | 43°F | Partly Sunny | 1 to 5 mph SSW | 4% |
| Friday Night | 36°F | Mostly Cloudy | 0 to 6 mph SSW | 10% |
| Saturday | 52°F | Partly Sunny | 1 mph S | 10% |
| Saturday Night | 37°F | Partly Cloudy | 1 to 7 mph SE | 7% |
| Sunday | 54°F | Chance Light Rain | 2 to 13 mph SSW | 28% |
| Sunday Night | 35°F | Chance Light Rain then Slight Chance Light Snow | 0 to 6 mph SW | 28% |
| Monday | 50°F | Partly Sunny | 1 mph SSW | 13% |
| Monday Night | 36°F | Slight Chance Light Rain | 0 mph | 13% |
| Tuesday | 52°F | Mostly Sunny then Slight Chance Light Rain | 0 to 3 mph SW | 19% |
| Tuesday Night | 37°F | Slight Chance Light Rain | 2 mph S | 22% |
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
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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 Nov 4, 2026.