Autumn is one of the best times to visit Iran. From September through November, temperatures across the central plateau drop to a comfortable 15–26°C, the summer crowds disappear, and the country’s most distinctive seasonal events come to life: Mehregan, the ancient harvest festival; Jashn-e Anar, the pomegranate celebration; and the saffron harvest that turns the plains of Khorasan purple. This complete guide covers autumn weather region by region, the best cities to visit, things to do, and everything you need to plan your trip.