Planning for the weather is a good way to make your trip to Kolašin relaxing and enjoyable, especially when you’re splurging. The hottest months are usually August and July with an average temp of 62°F, while the coldest months are January and February with an average of 31°F. The rainiest months in Kolašin are November, December, January, and February, with each month seeing an average of 10 inches of rainfall.