Planning for the weather is a good way to make your trip to Fernie relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August, with an average temperature of 14°C, while the coldest months are February and December, with an average of -6°C. The snowiest months in Fernie are December, February, January and March, with each month seeing an average of 33 cm of snowfall.