Low-seasons and high-seasons refer to the boom and bust season of tourism in a particular place. Meaning that a destination is full of tourists because of some factors like the weather and atmosphere, or the opposite, fewer tourists go there.
Traveling during the off-season means that you will experience the approximately lowest prices and the most secluded attractions. Off-season, for various reasons, is a time when tourists will not be very interested in a particular destination.
We can say Iran is always in high season because it has a wide geographical area and you can experience different climates in one month in various cities.
In winter, the southern islands of the Persian Gulf and southern cities are the best places to travel, while spring and summer are the best times to travel to northern cities such as Tabriz.
In general, the high season in Iran is two seasons, spring and autumn. In other words, middle of March, April, May, September, October, and early November are the busiest travel months in Iran.
You can also come to Iran in winter and summer and enjoy your trip if you choose suitable cities or you don’t mind cold weather.
Note: Be sure to pay attention to the official holidays of Iran and religious months such as Ramadan and Muharram. Holidays like Nowruz leave Iranians free to travel, and the inhabitants of this land travel themselves, so your destination city may be too crowded. Although spending Nowruz in Iran will be a memorable experience.
During Ramadan, most cafes and restaurants are closed till evening call for prayer due to fasting, and this may be difficult for you, but instead, people are up all night. In Muharram, apart from seeing special mourning rituals during this month, you can have votive food and be a guest of Iranians.
Make sure you read the official Iranian holiday calendar before planning a trip.