Big Sky climate

Typical historical weather for Big Sky, United States, averaged across 10 years of hourly climate data. Pick a date for a specific day.

Want today's actual conditions instead? See the current forecast for Big Sky.

Annual average

1.5°C

across all months

Warmest month

22.9°C

Jul average high

Coolest month

-12.7°C

Dec average low

Annual rainfall

813mm

total per year

Monthly averages

Average daily high/low temperature (band) and monthly rainfall (bars).

● Avg high● Avg low▮ Rainfall

Records on file

Hottest day

29.1°C

10 August 2018

Coldest day

-38.6°C

13 January 2024

Wettest day

34.5mm

13 June 2017

Windiest day

4.9m/s

17 December 2025