Big Sky Snow Report and Forecast
Snow Forecast for Big Sky
When will there be fresh snow?
This is the Snow Forecast for Big Sky, United States for 16 days from 19 May.
Updated 20 May 2025 08:33 NZST.
| Next Snow Expected | 20 May |
|---|---|
| Next Snow Amount | 1cm |
| Next 48 Hours | 3cm |
| Next 7 Days | 12cm |
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For Forecast detail, see below.
For current snow depths and skiing conditions, see our Current Snow Report for Big Sky.
Forecast for today in Big Sky
Max 11℃
Min -2℃
Freeze-thaw (spring snow) conditions, with valley temperatures cooling to -2℃ and rising to 11℃
Temperature at BaseTemp at Base
Mon
19
Snow unlikely
Cloudy early, then clear sky later.
Big Sky has 3cm new snow forecast in the next 48 hours.
Big Sky Snow Report
| Upper Snow Depths |
| - |
| Lower Snow Depths |
| - |
| Snow Conditions |
| - |
Big Sky 7-Day Snow Forecast Overview
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| Mon 19 | Tue 20 | Wed 21 | Thu 22 | Fri 23 | Sat 24 | Sun 25 | |
|---|---|---|---|---|---|---|---|
| Wind | SW F3 | W F3 | SW F2 | ||||
| 3,410m | 0℃
| 0℃
 +1cm
| 0℃
+2cm
| 4℃
+1cm
| 6℃
+2cm
| 5℃
 +6cm
| 8℃
 |
| SW F4 | SW F3 | SW F3 | |||||
| 2,740m | 5℃
| 5℃
 +1cm
| 5℃
+2cm
| 9℃
| 11℃
| 10℃
+1cm
| 12℃
|
| NW F2 | SW F2 | ||||||
| 2,070m | 11℃
| 11℃
| 10℃
+1cm
| 14℃
| 16℃
| 15℃
 | 16℃
|
| Snow Line | varying 2,339m | varying 2,299m | 2,689m | 2,879m | varying 3,389m | ||
| Max Town | 11℃ | 11℃ | 10℃ | 14℃ | 16℃ | 15℃ | 16℃ |
| Min Town | -2℃ | 0℃ | -1℃ | 2℃ | 3℃ | 5℃ | 3℃ |
This table shows the average forecast snowfall, the maximum temperature, and expected general weather at resort, lower and upper mountain levels. For daily forecast details, see below.
Big Sky Medium-Range (7-Day) Snow Forecast Detail
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.
Max 11℃
Min -2℃
Freeze-thaw (spring snow) conditions, with valley temperatures cooling to -2℃ and rising to 11℃
Temperature at BaseTemp at Base
Mon
19
Snow unlikely
Cloudy early, then clear sky later.
Max 11℃
Min 0℃
Valley temperatures from an overnight low of 0℃ to daytime highs around 11℃
Freeze-thaw (spring snow) from mid-mountain up.
Temperature at BaseTemp at Base
Snowfall per hour
Snow Line
Tue
20
up to 1cm New Snow
Cloudy.
Snow Line from 2,339m to resort level.
Max 10℃
Min -1℃
Valley temperatures from an overnight low of -1℃ to daytime highs around 10℃
Freeze-thaw (spring snow) from mid-mountain up.
Temperature at BaseTemp at Base
Snowfall per hour
Snow Line
Wed
21
1cm to 2cm New Snow
Cloudy, clear sky, cloudy later.
Snow Line from 2,299m to resort level.
Max 14℃
Min 2℃
Valley temperatures from an overnight low of 2℃ to daytime highs around 14℃
Freeze-thaw (spring snow) from mid-mountain up.
Temperature at BaseTemp at Base
Snowfall per hour
Snow Line
Thu
22
up to 1cm New Snow
Clear sky, cloudy, drizzle later.
Snow falling to 2,689m, with rain below.
Max 16℃
Min 3℃
Valley temperatures from an overnight low of 3℃ to daytime highs around 16℃
Freeze-thaw (spring snow) from mid-mountain up.
Temperature at BaseTemp at Base
Snowfall per hour
Snow Line
Fri
23
up to 2cm New Snow
Clear sky first, cloudy then clear sky, cloudy later.
Snow falling to 2,879m, with rain below.
Max 15℃
Min 5℃
Valley temperatures from an overnight low of 5℃ to daytime highs around 15℃
Freeze-thaw (spring snow) conditions up high.
Temperature at BaseTemp at Base
Snowfall per hour
Snow Line
Sat
24
up to 6cm New Snow
Light drizzle first, rain showers then drizzle, light drizzle later.
Snow Line from 3,389m to 2,549m, with rain below.
Max 16℃
Min 3℃
Valley temperatures from an overnight low of 3℃ to daytime highs around 16℃
Freeze-thaw (spring snow) from mid-mountain up.
Temperature at BaseTemp at Base
Sun
25
Snow unlikely
Clear spells early, then clear sky later.
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 piste 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 08:33 NZST, next update expected imminently.
Snow Forecast near Big Sky
| Snow Report and Forecast | 48 Hr | Mon | Tue | Wed | Thu | Fri | Sat | Sun | 7 Day |
|---|---|---|---|---|---|---|---|---|---|
| Moonlight Basin | 3cm | 4cm |
Understanding and predicting Snow Conditions in Big Sky
Here are our tips for making the most of a trip to Big Sky, with the help of the J2Ski Snow forecasts and reports. You can find some great skiing in Big Sky, but like any mountain, snow conditions change throughout the season, from day to day, and even from hour to hour.
Whether you’re sticking to the marked pistes or venturing off-piste, here’s what you need to know:
Pistes (Groomers) or Off-Piste
These can be a world apart, regarding snow conditions, even ignoring the difference between the natural terrain features to be found off-piste and the generally controlled surfaces and slopes of a pisted (groomed) run.
- Piste Conditions can range from fresh powder to firm, icy surfaces, particularly after warm spells or a busy day on the mountain with the passage of many skiers.
- Off-Piste Conditions are far more variable. Wind and sun can quickly transform fresh snow into wind crust or slushy layers, whilst cold weather can preserve stashes of powder many days after a snowfall.
WARNING - skiing off-piste (out-of-bounds) at Big Sky is not always controlled (slopes made safe from avalanche risk) or patrolled. Always check local advice, ski with safety kit (and know how to use it), and never ski alone.
Analyzing Weather and Snowfall Forecasts
Whilst no forecast can tell you exactly how snow conditions in Big Sky will develop, checking the forecast regularly should give you an idea of what to expect.
New snowfall can bring fresh powder and refresh the surfaces of pisted runs. Powder can be tracked out quickly at busy times, but in less crowded and shaded areas, fresh snow can linger for days.
Changes in weather conditions, such as milder temperatures, rain or wind, can degrade snow quality. Conversely, cold, stable weather can preserve conditions for extended periods.
Predicting Future Snow Quality
Regularly check our snow and weather forecasts for Big Sky for changes that may affect snow quality. Forecast snowfall depth and recent snowfall are good indicators of what to expect.
Use historical data and recent snow reports to understand past snow conditions and anticipate future changes.