Iranians are so hospitable people and they always cherish the guest. But visiting Iran in some periods may have some limitations because of natural or religious reasons. Therefore traveling to Iran in some period of time is not recommended.
Iran is a four-season country, so in each month of the year you can visit iran an especial part of it. If you are going to travel to the southern parts, it’s better to go there in autumn or winter. In this case while enjoying spring in Persian Gulf, you can go for ski in west and northern parts. For traveling to the west and north of Iran (mountainous regions), spring and summer would be appropriate. In these seasons you can go for excursion and enjoy your time. Bear in mind that in this time the weather is humid on the sidelines of the Caspian Sea. Also if you plan to stay in deserts of Iran the months: October, February and March would be great.
Iranian’s New Year Eve (Norouz), coincides with beginning of spring (20th March-3th April). In these two weeks, most of Iranians go to travel and most of hotels and residencies are full of passengers. Visitors of historical places and archeological sites increase tremendously in this period. Therefore, during these days it is better not to travel to Iran.
Iranians are Shia Muslim and they fast during month of Ramadan (9th month of lunar year), so most of the restaurants are closed during the day. Also in the first ten days of Muharram (first month of the lunar year), the Iranians hold the funeral ceremonies for the martyrdom of the 3rd Shia Imam and during these ten days especially on 9th and 10th of Muharram there are many mourning carnivals and congregations in the streets. Hence, most of the welfare services are closed.