Monthly weather forecast and Climate
Big Sky, MT US

The warmest month (with the highest average high temperature) is August (78°F).
The month with the lowest average high temperature is December (29.5°F).

The month with the highest average low temperature is July (40.1°F).
The coldest month (with the lowest average low temperature) is December (6.6°F).

Wettest months (with the highest rainfall) are May and June (2.8").
Driest months (with the lowest rainfall) are February and March (1.2").

The month with the highest snowfall is January (31.9").
The month with the lowest snowfall is August (0").