Iran Travel Booking > About Iran > Iran Travel Guide > Weather Weather condition July is the hottest month in Tehran with an average temperature of 30°C (86°F) and the coldest is January at 4°C (39°F).The ‘Fall’ season (20 sep-20 Nov) or Spring (20 march-20 Jun) in Iran is characterized by relatively mild and pleasant weather conditions. High Season (Mar–May) […]