Big Sky 7-Day Snow Forecast

Big Sky Long-Range Snow Forecast Updated today

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Updated 08 October 2026 22:41 AEDT

Long-Range Snow Forecast for Big Sky

Long-range (14 to 45 days) from 8 October.

For Forecast detail, see below.

Big Sky Snow Forecast Highlights

When will there be fresh snow in Big Sky?

Big Sky Snow Forecast Highlights - GFS
Snowfall prediction at mid-mountain (2,740m)
Next Snow Expected	11 October
Next Snow Amount	15cm
Next 48 Hours	-
Next 7 Days	39cm

Long-range Snow Outlook for Big Sky

Snowfall

Snow Line

Max 21℃
Min 0℃

34cm New Snow

Snow Line from 3,109m to resort level (2,070m).

Powder Alert!

Powder Alarm issued 09 October 2026 04:53 AEDT

Powder Possible :- 20cm of Fresh Snow is forecast for Big Sky over the next 4 days.

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Big Sky Long-Range (2 weeks+) Snow Forecast Outlook

Note :- Mountain weather is extremely dynamic; the forecast below will change. Any forecast snow may move forward or back in the forecast, and predicted snowfall depths will be revised in subsequent updates.

16 Day Weather and Snow Forecast for Big Sky from OpenMeteo(GFS)
	Snow and Weather	Temp Town
Thu 08	Clear sky.	Max 19℃ Min 6℃
Fri 09	Clear sky.	Max 21℃ Min 9℃
Sat 10	Cloudy.	Max 15℃ Min 4℃
Sun 11	up to 15cm New Snow Heavy snow at altitude, rain showers below. Snow Line from 2,489m to resort level (2,070m).	Max 3℃ Min 1℃
Mon 12	1cm to 6cm New Snow Heavy snow showers at altitude, light rain below. Snow Line from 2,739m to resort level (2,070m).	Max 5℃ Min 1℃
Tue 13	Cloudy.	Max 9℃ Min 1℃
Wed 14	2cm to 12cm New Snow Light snow showers at altitude, light rain below. Snow Line from 3,029m to resort level (2,070m).	Max 6℃ Min 0℃

This Snow Forecast for Big Sky, United States gives the predicted Snowfall and Freezing Levels for the next week.

The forecast snowfall depths given are the likely average accumulations for the Lower and Upper slopes. The actual snow depth in Big Sky, on any given trail or itinerary, may be dramatically different, particularly if the snowfall is accompanied by high winds and/or varying air temperatures.

Snow Forecasts beyond two days ahead are subject to significant change and variable reliability.

Big Sky Snow Forecast updated at 22:41 AEDT, next update expected imminently.

Ensemble forecast for Big Sky, USA at 2,070m

Daily Mean Temperature (yellow line is control)

Daily Total Precipitation (blue line is control)

What are Forecast Ensembles ? Multiple forecasts from running the same weather model with slightly different inputs. The prominent line (the 'control') is the model output from standard inputs, the thinner lines are the variations. Plotted together, they show a range of possible outcomes; the closer they are, the higher the confidence.

How to read Long Range Ensemble Forecasts

These forecasts are from ECMWF EC46, a long-range, low-resolution (area) model. They may not accurately reflect local conditions and should be read as area forecasts, indicating whether the coming weeks are likely to be warmer, colder, wetter, or drier than average.

What to look for?

Temperatures trending downward at the same time as precipitation spikes upward... means snow!

Lines close together indicate a high confidence, while wider spreads signal uncertainty.

Snow Forecast near Big Sky

Snow Forecasts for Ski Resorts near Big Sky
Ski Area	48 Hr	7 Day	Th	Fr	Sa	Su	Mo	Tu	We
Moonlight Basin	-	38cm

How reliable is the snow in Big Sky?

Big Sky enjoys reliable snow conditions, with an average annual snowfall of over 400 inches. Skiers can expect a solid snow depth throughout the season, but it's advisable to check J2Ski for the latest snow conditions.

Off-Piste Safety in Big Sky

Before skiing or snowboarding off-piste in Big Sky, you must assess the local snow conditions. Always check the local Avalanche Risk Level and ski with appropriate safety equipment.