Mild
Average highs are around 24°C, so days are mild rather than hot.
Weather Guide
Big Sky, Montana, United States Average Monthly Weather
Weather score42Mixed annual avg
Best months: July, August, June
Across the year, average daytime temperatures are around 9°C, sunshine averages 7.4h per day, and rainfall totals about 629mm.
Annual weather
Annual averages
Temp
9°C
Rain
629mm
Annual total
Sun
7.4h
Weather score
42
Mixed avg
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
Weather scoreWeather score
Trip feel
Drier
Rainfall averages 48mm, which is relatively low for holiday planning.
Bright
Sunshine averages 10h per day, so bright days are a strong part of the month.
Map
Weather map
Compare Big Sky, Montana, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
August24°C average high
August is one of Big Sky's warmest months, with daytime heat above the yearly average.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
August48mm average rain
August sits on the drier side of Big Sky's year, which helps with sightseeing and transfers.
Driest monthsJanuary to May and July to December
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
August10 hours average sun
August is brighter than Big Sky's yearly average, though the strongest sunshine usually sits closer to the peak months.
Brightest monthsJune to August
This stretch has the strongest sunshine in the monthly averages.
Weather score
August61 weather score
August scores above Big Sky's yearly average, so the overall weather mix is stronger than most months.
Best weather monthsJuly to August
These months have the strongest weather score in the monthly averages.
