Transylvania’s collection of astoundingly beautiful cities, Gothic architecture, dense fairy-tale forests and lush foothills are best explored from March through to October. At this time of year, the temperatures are mild, so outdoor activities and sightseeing are comfortable. It’s worth mentioning that the summer months of July and August can get very hot as most of Transylvania sits on a plateau, not quite benefiting from the cooler temperatures experienced in the mountains themselves.