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WEEKLY NEWSLETTER
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Iran
Index
Iran has a variable climate. In the northwest, winters are cold
with heavy snowfall and subfreezing temperatures during December
and January. Spring and fall are relatively mild, while summers are
dry and hot. In the south, winters are mild and the summers are
very hot, having average daily temperatures in July exceeding
38°
C. On the Khuzestan plain, summer heat is accompanied by high
humidity.
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
centimeters or less. The major exceptions are the higher mountain
valleys of the Zagros and the Caspian coastal plain, where
precipitation averages at least 50 centimeters annually. In the
western part of the Caspian, rainfall exceeds 100 centimeters
annually and is distributed relatively evenly throughout the year.
This contrasts with some basins of the Central Plateau that receive
ten centimeters or less of precipitation annually.
Data as of December 1987
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