Iran is a country of four seasons. This means that you can experience the beauties of all four seasons in Iran. At the same time, Iran is a vast country. In such a way that you will be able to experience the pleasure of swimming in the warm waters of the southern coasts of the country in winter and while it is snowing in the northern parts of Iran. (See here) Therefore, you can have a pleasant travel experience to Iran all year round. But if your itinerary is related to historical monuments and important cities of the country, we must say that in most parts of Iran from March to May and then again from late September to early November there is a favorable temperature.