Swan Lake, MT Weather & Growing Conditions
Today
74°F
Sunny then Patchy Smoke
Patchy smoke between noon and 1pm. Sunny, with a high near 74. South southwest wind 0 to 3 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 74°F | Sunny then Patchy Smoke | 0 to 3 mph SSW | 0% |
| Tonight | 52°F | Mostly Clear | 2 mph SSW | 0% |
| Wednesday | 80°F | Sunny | 0 to 3 mph WSW | 0% |
| Wednesday Night | 54°F | Clear | 2 mph S | 0% |
| Thursday | 86°F | Sunny | 0 to 3 mph SW | 0% |
| Thursday Night | 58°F | Clear | 2 mph SSE | 0% |
| Friday | 88°F | Sunny | 0 to 6 mph SSW | 0% |
| Friday Night | 59°F | Clear | 1 to 10 mph SSW | 0% |
| Saturday | 86°F | Sunny | 1 to 8 mph SSW | 0% |
| Saturday Night | 58°F | Mostly Clear | 0 to 8 mph SW | 0% |
| Sunday | 82°F | Sunny | 0 to 5 mph SW | 0% |
| Sunday Night | 57°F | Mostly Clear | 0 to 3 mph WSW | 0% |
| Monday | 81°F | Sunny | 0 to 3 mph WNW | 0% |
| Monday Night | 56°F | Mostly Clear | 2 mph ESE | 1% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Swan Lake, MT
Last spring frost
May 17
First fall frost
Sep 19
Growing season
121 days
Hardiness zone
5b
Explore more for Swan Lake, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Swan Lake, Mt (4.2 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.