en تخصصي Special مقاله اصیل Original Article <div style="text-align: justify;">Background: This study presents a comprehensive thermal comfort atlas for Iran based on the Universal Thermal Climate Index (UTCI). Utilizing 30 years of meteorological data from 49 stations across the country, the study analyzed seasonal and regional variations in thermal comfort.<br> Methods: De Martonne&rsquo;s climate classification was used to categorize Iran&rsquo;s climate, and the UTCI was calculated for different seasons. Kriging interpolation was used to create zoning maps, providing spatial representations of thermal comfort conditions.<br> Results: The results indicate significant regional disparities in thermal comfort. Arid climates experience severe heat stress, particularly in summer, while Mediterranean climates generally offer more favorable conditions. Seasonal variations are also pronounced, with autumn and spring being more comfortable seasons overall.<br> Conclusion: The study highlights the need for urban planning and building design to address thermal comfort challenges, particularly in areas prone to extreme heat or cold. Future research should consider additional thermal comfort indices and expand the analysis to include more recent data and a wider range of climate zones.</div> Seasons, Extreme heat, City planning, Iran, Spatial analysis 1 15 http://ehemj.com/browse.php?a_code=A-10-1-414&slc_lang=en&sid=1 Mehdi Asghari m.asghari2011@gmail.com 100319475328460021517 100319475328460021517 No Department of Occupational Health and Safety Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran Hossein Safari Palangi hossein.comely@gmail.com 100319475328460021518 100319475328460021518 No Health Promotion Research Center, Iran University of Medical Sciences, Tehran, Iran Marzieh Abbasinia abbassinia.m@gmail.com 100319475328460021519 100319475328460021519 No Occupational Health Engineering, Social Determinants of Health Research Center, Saveh University of Medical Sciences, Saveh, Iran Akram Tabrizi tabrizi9@gmail.com 100319475328460021520 100319475328460021520 No Student Research Committee, School of Public Health and Safety, Shahid Beheshti University of Medical Sciences, Tehran, Iran Gholamabbas Fallah Ghalhari ab_fa789@yahoo.com 100319475328460021521 100319475328460021521 No Department of Geography and Tourism, Faculty of Natural Resources and Earth Sciences, University of Kashan, Kashan, Iran Fahimeh Shakeri fa.shakeri145@yahoo.com 100319475328460021522 100319475328460021522 No Faculty of Geography and Environmental Sciences, Hakim Sabzevari University, Sabzevar, Iran Somayeh Farhang Dehghan Somayeh.farhang@sbmu.ac.ir 100319475328460021523 100319475328460021523 Yes Corresponding author: Environmental and Occupational Hazards Control Research Center, Research Institute for Health Sciences and Environment, Shahid Beheshti University of Medical Sciences, Tehran, Iran