Tourism as a major sector of the global economy is influenced by weather and climate. Nowadays, the amount and timing of climate conditions at any location due to its application to human activities and climate change is under the attention of many researchers in the atmospheric sciences and tourism. The aim of this study was to determine the climate calendar of tourism of Hamadan using climatic comfort indices, dust and drought classification. For this purpose, Standard effective temperature (SET), Physiological Equivalent Temperature (PET) and predicted mean vote (PMV), vertical visibility (vv) and Standard Precipitation Indicator (SPI) indicators were calculated. In this study, Daily climate data of mean air temperature ° C, relative humidity (%), wind speed (m.s) and Cloudiness (Acta) were obtained in Hamadan from the Meteorological Organization of Iran. In general, according to the SET indicator, from June to September, based on PET and PMV indicators, from June to July and September to October are highest climatic comfort throughout the year. Furthermore, BD group (vv is less 10 km) has been seen from the late of spring to the first of autumn and the other times there are DIS group (vv is more than 10 km).The results show that drought classes (SPI) are in cold days more than warm days.
