Iran is one of the rare four-season countries
with variety of changing climate.
In the North West (Tabriz, Orumieh, Ardabil, Zanjan,
Tehran), winters are cold with heavy snowfall and
subfreezing temperatures especially during December and
In the south and center; weather is sunny most of the time,
except some rainfalls in winter and spring.
In the Western part of the Caspian Sea (Rasht, Sari,
Golestan), rainfall exceeds 100 centimeters annually and is
distributed relatively evenly throughout the year.
On the other hand in the South (Bandar Abbas, Boushehr,
Ahvaz) winters are mild and the summers are almost very hot,
average daily temperatures in July exceeding 38° C. The days
are extremely hot and the nights are mild from June to
In most of the country's East & West (Shiraz, Isfahan),
yearly precipitation averages of weather are 25 centimeters
or less. Also springs and falls are relatively mild with
pleasant weather in March and April.
In general, it has an arid climate in which most of the
relatively scant annual precipitation falls. But, the major
exceptions are the higher mountain valleys of the Zagros and
the Caspian Sea coastal plain, where precipitation averages
at least 50 centimeters annually. Snow falls heavily on the
mountain peaks and is the principal source of water for
irrigation in spring and early summer. The Caspian littoral
is warm and humid throughout the year. Here the seasons
change abruptly; by the Persian New Year, the first day of
spring, orchards are in bloom and wild flowers abound.
The temperature difference between different points in Iran
during the summer and winter is 100 that in the book of
Mr.Afshin Bakhtiar has been introduce as one of the cryptic
numbers of Iranian nature. In fact, the secret of Iran's
varied nature is encoded in seven 'magic' numbers, that 100
is one of them:
100: The temperature difference between different points in
Iran during the summer and winter. In Hamadan, for example,
the temperature drops by at least 2°C if one climbs just 200
meters up Mount Alvand. Similarly, in AbarKouh, a few
kilometers in to the desert the temperature will undoubtedly
climb more than a few degrees. If we assume that the
temperature drops by about 1°C for every 100 meters
elevation, the question of what constitutes the" correct"
temperature becomes rather more difficult to answer. How low
is the temperature at 4000 meters, or on top of Mount
Damavand (5671 m), for that matter? At the other ends of the
scale, my esteemed mentor; Dr Parviz Kardavani believes that
the warmest point on the planet is not to be found, as
claimed elsewhere. In Arizona, Arabia or the deserts of
Libya but instead in the Kavir-e- Lut in Iran, where
temperatures in excess of 600 C have been reported.
Accordingly, assuming the temperature atop the highest peaks
in Iran reaches at least 400 C below zero and that in the
Kavir-e Lut reaches 60°C, the temperature difference thus
obtained equals 100°e, a figure of much significance.
600: The highest point in the Iranian Plateau, Mount
Damavand. , Stands 5671 meters above and its lowest point,
in the vicinity of the Caspian Sea, lies27 meters below sea
level. Simple arithmetic indicates, therefore, that the
elevation range in the Iranian plateau equals approximately
With a glance on the following table, you can have a better
picture of Iran's usual climate: