It has desert or dry continental climate. All Iran is arid or semi-arid, except on the coast of the Caspian Sea where a subtropical climate dominates. In the Northwest the winters are cold with heavy snowfall and temperatures below zero in December and January. Spring and summer are relatively mild, while summers are hot and dry. In the South, winters are mild and summers are very warm, with an average daily temperature in July above 38 ° C. The summer heat is accompanied by high humidity in the Khuzestan plain.
The Bee-eater of Iran.
In general, Iran has an arid climate in which relatively scant annual precipitation ranges from October to April. In most parts of the country, annual precipitation has an average of 25 centimeters or less. The
great exception is the mountain most high valleys of the Zagros and the
coastal plain of the Caspian, where the average rainfall reaches at
least 50 cm annually. In the western part of the Caspian, rainfall exceeds 100 cm annually and is distributed relatively evenly throughout the year. This contrasts with some basins of the central plateau that receive 10 cm or less annual rainfall.
Map of biotopes of Iran.
Forest steppe / steppe arboree
Forests and wooded lands / areas arborees
Semi-desert/zones semi desertiques
The desert lowlands / desertiques plaines
Alluvial salt marshes / Marais saumatres alluviaux