In general, Iran has an arid climate in which most of the relatively scant annual precipitation falls from October through April. In most of the country, yearly precipitation averages 25 centimetres or less. The major exceptions are the higher mountain valleys of the Zagros and the Caspian coastal plain, where precipitation averages at least 50cm annually. In the western part of the Caspian, rainfall exceeds 100cm annually and is distributed relatively evenly throughout the year.
It is located on the Iranian Plateau and as one of the most mountainous countries in the world, Iran is covered by rugged mountain ranges and deserts. While Zagros and Alborz mountain ranges cover the western and northern parts of Iran, the golden deserts of Dasht-e Kavir (The Great Salt Desert) and Dasht-e Lut (The Emptiness Desert) are located on central and eastern sections.
By having dense rain forests in the north, warm sunny beaches in the south, snowy mountains in the west and amazingly hot deserts in the east, Iran is one of the few countries that gives the joy of experiencing four different seasons at the same time to travelers