Tourism is considered one economical part susceptible to the climate and the effect of attractions and climate obstacles on tourism have more importance. Climate is one of the important factors in the tourism development: one suitable climate can be followed with the positive answers of tourists and tourists plan their trip according to the climate condition. In this research, by using tourism climate index (TCI) Mixofoski (1985) evaluated tourism climate Markazi province and southern khorasan province and the generalization of point by point data combination of maps, times and suitable locations have been identified to attend tourists using GIS facilities. the results showed that the rank percent of climate comfort times of southern khorasan is more than Markazi province , So that , in Markazi province ordibehestht (Iran month) to Mahr has the best conditions. for tourists and Azar , Dey, Bahman and Esfand months has in comfort situation of good, acceptable and taw due to severe cold and ices and in this province during year ideal rank is 16.66%, excellent rank is 28.03% , very good rank is 8.33%, good rank is 16.66% , acceptable rank is 27.72%. 10w rank is 7/57% , while in southern khorasan , Farvardin , Ordibehshet , Khordadm, Tir, Mordad, Shahrivar, Mehr, Aban, Esfand months are the suitable times for tourism and just Azar , Dey , Bahman months are acceptable for trip according to climate comfort in some cities like Birjand , ghayen , Ferdous. In southern Khorasan, 17/85% is for ideal rank, 37/71% for excellent, 14/28% for, very good, 17/85 for good and in southern Khorasan , the tires of climate comfort for tourist attraction is more than Markazi province and the climate calendar differs in two provinces.