Spring (April-May): Wildflowers bloom across meadows and mountains, temperatures mild (10-20°C). Easter celebrations showcase traditional customs. Fewer tourists make this ideal for castle visits. Some high mountain passes still closed. Perfect for photography with green landscapes and clear air.
Summer (June-August): Peak tourist season with warm weather (20-30°C) and all attractions open. Festival season brings cultural events, medieval fairs, and outdoor concerts. Mountain hiking at its best with all trails accessible. Crowded at major sites like Bran Castle; book accommodations early. Occasional afternoon thunderstorms in mountains.
Autumn (September-October): Perhaps the best time to visit with stunning fall foliage, comfortable temperatures (15-25°C), and harvest festivals. Fewer crowds than summer but all attractions still operating. Wine harvest celebrations and traditional food festivals. Excellent hiking weather with clear mountain views. Early October ideal before November rains begin.
Winter (November-March): Snow transforms Transylvania into winter wonderland. Christmas markets in Sibiu, Brașov, and Cluj magical. Skiing available in Poiana Brașov and surrounding resorts. Some castles and mountain roads closed. Accommodation cheaper but limited hours at attractions. Authentic experience with fewer tourists. Temperatures often below freezing (-5 to 5°C).