Planning for the weather is a good way to make your trip to Razlog relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July with an average temp of 64°F, while the coldest months are January and February with an average of 33°F. The snowiest months in Razlog are November, January, December, and February, with each month seeing an average of 7 inches of snowfall.