Big Sky, MT Weather & Growing Conditions
Local forecast, frost dates, hardiness zone and planting guidance for Big Sky, a community in Madison County, Montana.
Today
70°F
Areas Of Smoke
Areas of smoke. Sunny, with a high near 70. Northeast wind 0 to 7 mph, with gusts as high as 18 mph.
7-day forecast for Big Sky
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Today | 70°F | Areas Of Smoke | 0 to 7 mph NE | 0% |
| Tonight | 43°F | Areas Of Smoke | 0 to 7 mph W | 0% |
| Wednesday | 76°F | Patchy Smoke | 0 to 7 mph WSW | 0% |
| Wednesday Night | 48°F | Patchy Smoke then Mostly Clear | 1 to 7 mph WSW | 0% |
| Thursday | 84°F | Sunny | 1 to 8 mph WSW | 0% |
| Thursday Night | 52°F | Mostly Clear | 1 to 7 mph SW | 0% |
| Friday | 86°F | Sunny | 1 to 10 mph SW | 0% |
| Friday Night | 53°F | Mostly Clear | 0 to 10 mph WNW | 0% |
| Saturday | 85°F | Sunny | 0 to 10 mph W | 2% |
| Saturday Night | 53°F | Partly Cloudy | 0 to 8 mph NW | 2% |
| Sunday | 83°F | Sunny | 0 to 8 mph WSW | 3% |
| Sunday Night | 51°F | Partly Cloudy | 0 to 7 mph WSW | 7% |
| Monday | 82°F | Sunny | 0 to 7 mph WSW | 3% |
| Monday Night | 50°F | Partly Cloudy | 0 to 6 mph WSW | 6% |
Forecast source: National Weather Service (api.weather.gov) for Big Sky (45.256, -111.332). Updated through the day.
Growing snapshot for Big Sky
Growing season
50 days
Hardiness zone
4b
More local growing data for Big Sky: nearby ZIP 59716 weather · frost dates · planting calendar · Montana frost dates
Nearby towns & communities
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Twin Bridges
Virginia City
Climate data from the nearest NOAA station, Big Sky 2Wnw, Mt (3.2 mi from Big Sky). Frost dates are 1991–2020 averages, not a forecast. Page updated Aug 4, 2026.