Study of weather as the fleeting atmospheric conditions and climate as the prevailing weather of a region, can be effective as a local index for area attractions and activities and comfort of tourists. Checking the bio- climate of the regions gives tourists possibility to choose and survey their ideal eras from the view point of comfortableness in specific sessions. In this study, using bioclimatic indices such as Backer (CPI), stress, Steadman-Tom (THI), non-comfort (Humidex) (HU), Tom thermo hygrometric (THI), tourism climate of Urmia city have been evaluated. In order to calculate each of the criteria stated in the monthly time scale, the parameters of temperature, relative humidity, wind, vapor pressure of synoptic stations of Urmia during 1951 to 2005 were used. As a result, in Baker index, the months of April, May, November and December are suitable for tourism. In stress index both July and August, at the Steadman-Tom index August, September and June, in temperature-humidity index, months of May, June, July, August and September are comfortable and suitable for tourism. In the Non Comfort index, there is no month of the year having non comfortableness qualification.