The climate of Iran ranges from arid to semi-arid, to subtropical along the coast of the Caspian Sea and northern forests. In Iran, temperatures vary greatly according to the seasons and regions. Iran is one of the countries in the world that has four full seasons; The ground of which each inch needs a thorough evaluation. The north is covered with evergreen forests and holds the Caspian, the largest lake in the world, and has a moderate climate; The south is led to the Persian Gulf, with a warm and humid climate, magnificent and attractive palm trees; to the east, hot deserts covered with golden sand and nights full of stars; In the west the vast fields of wheat and in Teheran high mountains of the chain of Alborz, All together impresses every visitor.