Big Sky weather
Loading live data…Mostly clear,much the same tomorrow
NWS, the American and the European model put Big Sky's high today between 56° and 61°, a 4° split. Tomorrow: cloudy, around 59°, with a 0% chance of rain.
Latest for Big Sky: NWS (National Blend (NBM)): 40° Mainly clear · American (NOAA GFS): 43° Clear · European (ECMWF): 29° Mainly clear.
CheckWeather.io on iPhoneFree. No ads, no account.Big Sky weather alerts and warnings
active National Weather Service watches, warnings and advisoriesChecking the National Weather Service for active alerts covering Big Sky…
Big Sky weather in numbers
from 30 years of measured normalsBig Sky swings 64°F across the year, from 69°F highs in July to 5°F lows in December, and June is usually the wettest month in a year that brings about 31 in of precipitation.
The weather map: all three models at once
NWS, American, European side by side around Big Sky and nearby towns.Live rain radar →Big Sky hourly forecast: next 14 hours
consensus of the three modelsRain in the next 24 hours, model by model
each model's own hourly precipitation, side by sideLoading the three models…
Big Sky 10-day forecast, out to 14 days
where the models agree, and where they splitBig Sky, Montana (MT) is at its warmest in Jul (average highs near 69°F) and coldest in Dec (lows around 5°F), with roughly 31 in of precipitation across the year. Below, compare what NWS, American, European forecast for Big Sky right now, and see exactly where they disagree.
We grade every model against the weather that actually happened, so you can see which forecast model is most accurate in United States before you trust any single number.
Big Sky climate by month
average daytime high and overnight low across a typical year (1991-2020)Source: 1991-2020 averages, ERA5 for this place adjusted with NASA POWER.
How the weather around Big Sky has changed since 1995
Big Sky sits in the same roughly 50 km square of NASA's reanalysis as Bozeman. That square shows no clear change in temperature between 1995-2004 and 2015-2024. See the full 30-year picture on the Bozeman page.
Which forecast is most accurate in the US?
CheckWeather Score, graded against the weather that actually happened
The CheckWeather Score blends temperature, wind and rain accuracy, each measured against ERA5 (the recorded weather) over the last 30 days across 1999 cities. Lower error means a higher score. See which forecast model is most accurate in United States, how we measure forecast accuracy, or which model each weather app uses.
What do you think of the forecasts?
your vote countsThe accuracy above is the measured record. This is your opinion: which forecast service do you trust most in United States? Give each 1 to 5 stars.
One vote per service. Anonymous: we store no personal data, only a one-way hash of your connection for a day to stop double votes.
Where the models disagree
temperature and rain, judged separatelyThe models often agree on temperature and still split on rain, and rain is usually what decides whether a plan survives. A wide rain range means the shower is genuinely uncertain, not that the forecast is wrong.