Is Big Sky snowsure?

The snowiest week in Big Sky is week 4 of April. There are typically 4.3 snowy days during this week with 31cm of snowfall. Check out the Big Sky Snow History graphs below.Select any week of the year to see the typical Ski Conditions, Snowfall Amount and Temperature based on nowcast weather data over the last 11 years.

Average monthly snow in Big Sky

MonthSnow amount (week)Snow days (week)
December19cm3.8 days
January14cm3.3 days
February20cm4.6 days
March23cm4.4 days
April28cm4.4 days

Average Snow and Weather Conditions in Big Sky during December (week 2):

The average snowfall forecast during week 2 of December for Big Sky is 18 cm. There are typically 3.6 snowy days during this week. Big Sky normal weather and snow conditions during the second week of December at the middle elevation of the ski area at 2736m, based on historical averages over the last 10 years: At this time of year the typical freezing level (1243m) is far below the middle elevation of Big Sky. Snowy weather is typical. On average, expect three or four days with snowfall per week in Big Sky in the middle of December. Forecast model average snowfall for the week is 18cm. Pretty cold temperatures with the average maximum temperature in Big Sky in week two of December of just -8.5°C at the middle elevation and minimum temperatures typically falling to -10.6°C. On average, a couple of days per week will have some sunshine. Mainly light winds (average 27km/h) are unlikely to affect lift operations but the historical norm is for the mean wind to reach 30km/h two days per week. Sunny, calm and below freezing ideal weather days that follow fresh snow (bluebird powder days) occur on average one day during this week but bluebird days that don't have fresh snowfall occur on average two days during this week each year.

Snow History: Compare Resorts

Compare Big Sky with:

Snow Depths

Recorded snow depths for the upper and lower slopes in Big Sky and (2007 – 2018).


Big Sky

Lower Slopes
Upper Slopes
Fresh Snow

Average Snow Conditions in

Best ski days per week in Big Sky and (2007 – 2018)


Bluebird Powder Day
(Fresh snow, mostly sunny, light wind)
Powder Day
(Fresh snow, limited sun, any wind)
Bluebird Day
(Average snow, mostly sunny, light wind)
Very windy days

The most cherished days on the mountain in Big Sky are Bluebird Powder days when it is mostly sunny with light winds following very recent snowfall. Poorer weather conditions may prevail on Powder days when the visibility can be limited but the snow is significantly deep and fresh for keen powder-hounds. Bluebird days can suit many skiers that aren’t necessarily hunting powder but want to enjoy the snowy mountains in sunnier conditions and light winds.

Average Snowfall in

Graph showing the average precipitation (snow/rain) in Big Sky and (2007 – 2018)


Snowfall amount
(bar chart)
Days with significant snowfall.
Days with significant rainfall.

The snowiest weeks of the year in Big Sky are shown but also bear in mind the number of days that it typically snows each week if you want regular fresh tracks. The risk of a rainy day is shown but be sure to switch between elevations to see if lower lifts are rain affected or higher lifts remain snowy despite any rain further down the mountain.

Average Temperature in

Graph showing the average temperature and freezing level at Big Sky and (2007 – 2018)


Average temperature
Above freezing
Below freezing
Freezing level
Dashed line

The highest and lowest temperatures averaged for each week of the year in Big Sky are shown. Check out the risk of freze-thaw conditions prevailing at different elevations for any given week. We also show the extremes of temperature (blue/red dots) that reveal the chance of unusually warm or cold conditions.