The President and his entourage were welcomed by a number of local officials at Gorgan airport.
President Rouhani is to address people in the city's main stadium within hours.
On Wednesday, the President is to attend a ceremony to inaugurate Iran-Turkmenistan-Kazakhstan railway along with his Turkmen and Kazakh counterparts at Iran's Inceh-Boroun border point.
The railway is about 920 km long. 85 km of the railway is located in the Iranian territory while 700 km is in Turkmenistan and the remaining in Kazakhstan.
The Iranian segment was constructed with a cost of 1,300 billion rials.
The railway will help promote the north-south corridor for transit of goods.
Speaking to reporters upon his arrival in Gorgan, President Rouhani said the railway will play a key role in development of both Iran and the region.
