There is no definite answer to this question. It all depends on your travel purposes and personal preferences. A vast country like Iran offers varied climates and beautiful attractions at any given time. In winter, northern and northwestern parts get their fair share of freezing weather and snowfall. But at the same time you can enjoy sunshine and pleasant temperatures in southern parts of Iran. That’s what we mean by saying Iran is a four-season country. Not only you can experience the four seasons throughout the year in Iran, you can also find diverse weather conditions at any given time in different parts of the country.
In general, western and northwestern parts go through harsh weather conditions during winter while central and southern regions witness scorching hot temperatures in summer. Therefore, you can usually get the best of mild weather in Iranian during spring and autumn. Following you can find a more detailed month by month travel guide to Iran.
Spring: Late March to June
The Persian New Year is marked at the beginning of spring. It usually falls on March 21 which is followed by a two-week holiday when Iranians get the chance to take a break and travel around the country. Therefore, the holiday is high season with prices higher than ever. It is also quite a challenge to find flights and book hotels for this period as they are sold out well in advance.
Aside from its first two weeks (unless you intend to join in the New Year festivity), spring is definitely the best time to be Iran. The only exception is Tehran. The New Year holiday season is the ideal time to visit the capital.
You will find the metropolis calm, beautiful and free of the usual traffic jams as many of the city’s residents leave it for their hometowns during the holidays. You can witness the rebirth of nature and enjoy pleasant and ideal temperatures in Iran during spring. The mild weather means you will be able to easily explore all parts of the country and see its wonders.
Summer: July to September
Summer weather in different parts of Iran can range from relatively warm and humid to brutally searing and dry. The northern coastal areas and western mountainous regions seldom get sweltering temperatures which scorch southern and central desert areas during the season. Therefore, if you are planning to visit Iran during summer you will be surprised by the gorgeous weather conditions in western and northwestern provinces.
However you should definitely avoid central deserts. In fact, back in 2004 and 2005, the Lut desert in central Iran was the hottest spot on the Earth’s surface with temperatures reaching as high as 70.7 degrees Celsius.
So if you are looking to trek through the desert or climb up and down the sand dunes you’d better forget about summer and choose some other time.
Autumn: October to December
Much of Iran enjoys a temperate and rainy climate in autumn. It is the season you can easily travel around and enjoy the scenic beauty of the country, especially desert destinations in the central region. Prices are also generally lower than in spring.
The Caspian Sea coast gets the most rainfall in autumn. In some parts autumn precipitation accounts for 60 percent of the total annual rainfall. In December, weather starts to get chilly and you can feel that winter is coming.
Winter: January to Late March
Winters usually get freezing cold in northern and mountainous regions of the country with much snowfall. Local roads are sometimes blocked and remote destinations become inaccessible due to heavy snowfall and harsh weather conditions. However, it is the season to enjoy winter sports in these parts of the country.
At the same time, central, southern and coastal regions of the Persian Gulf delight in a pleasantly mild climate with people enjoying swimming in the blue waters of the Persian Gulf.