Big Sky, MT Weather & Growing Conditions
Overnight
23°F
Mostly Cloudy
Mostly cloudy, with a low around 23. East wind around 5 mph.
7-day forecast
| When | Temp | Forecast | Wind | Precip |
|---|---|---|---|---|
| Overnight | 23°F | Mostly Cloudy | 5 mph E | 0% |
| Wednesday | 41°F | Mostly Sunny | 3 to 7 mph ENE | 0% |
| Wednesday Night | 23°F | Partly Cloudy | 2 to 10 mph SSE | 0% |
| Thursday | 36°F | Partly Sunny then Slight Chance Light Snow | 8 to 12 mph SSW | 22% |
| Thursday Night | 24°F | Slight Chance Light Snow | 8 mph SW | 22% |
| Friday | 36°F | Sunny | 8 to 12 mph SW | 0% |
| Friday Night | 24°F | Partly Cloudy | 9 to 14 mph SSW | 0% |
| Saturday | 42°F | Sunny | 7 to 10 mph SSW | 0% |
| Saturday Night | 27°F | Partly Cloudy | 7 to 15 mph SSW | 0% |
| Sunday | 44°F | Mostly Sunny | 10 to 16 mph SSW | 1% |
| Sunday Night | 28°F | Partly Cloudy | 9 to 15 mph SSW | 1% |
| Monday | 43°F | Mostly Sunny | 9 mph SW | 3% |
| Monday Night | 29°F | Partly Cloudy | 8 to 12 mph SSW | 3% |
| Tuesday | 43°F | Mostly Sunny | 10 mph SW | 5% |
Forecast source: National Weather Service (api.weather.gov). Updated through the day.
Growing snapshot for Big Sky, MT
Growing season
50 days
Hardiness zone
5a
Explore more for Big Sky, MT: full frost dates · planting calendar · Montana frost dates
Climate data from the nearest NOAA station, Big Sky 2Wnw, Mt (10.7 mi). Frost dates are 1991–2020 averages, not a forecast. Page updated Nov 4, 2026.