Aezoo Esmaeili - Master of tourism planning, Geographic sciences and planning faculty, Isfahan university
Zahra zeidi - Master of tourism planning, Geographic sciences and planning faculty, Isfahan university
Samira bakhti - Master of tourism planning, Geographic sciences and planning faculty, Isfahan university

Tourism and climate are so dependent on each other that nice and proper weather is counted as a potential and advantage for tourism. Many tourists pay a lot of attention to the weather of thezone they want to travel to in choosing time and place of tourism. In this research, to find theproper time for tourism activities in Gorgan, one of the combinational indexes of physiologytemperature called PET (physiologic equivalent temperature) is used. The result of the study,done by Rayman software program, shows that the climatic comfort period in Gorgan is 52 days, from March 1th to March 25th and from October 27th to November 15th. Also, in December, January in which days have low cold stress, and from March 25th to the end of themonth and from the beginning of October to its 16th January with low heat stress are programmable for tourism activities. June and July are accompanied by high heat stress,August by medium heat stress, the last few days of November and some days in the Februaryby medium cold stress are among the time limitations for tourism activities. Evidently, taking this into account is vital for a successful tourism program.

tourism schedule, Gorgan1, physiologic equivalent temperature (PET), Rayman software program