Planning for the weather is a good way to make your trip to Harrachov relaxing and enjoyable, especially when you’re splurging. The hottest months are usually July and August with an average temp of 61°F, while the coldest months are January and February with an average of 32°F. The snowiest months in Harrachov are December, November, January, and February, with each month seeing an average of 6 inches of snowfall.