Considering that each geographical zone has its own particular climate conditions, most building designers assume that by collecting sufficient information about the climate of one geographical zone they can apply the same design criteria in other zones which are climatalogically similar. In this regard, this research aims to carry out an in-depth study on the weather condition similarities and differences of one climate within two different geographical zones.The results revealed that despite the two cities of Bandar-Abbas in Iran and Belem in Brazil have similar climate, the building design norms which essentially provide the needs of inhabitants by taking the climatic conditions into account are totally distinct. Moreover, the weather in Bandar-Abbas is in comfort zone in December, January, and February in days and chilly at nights. However, in March, both days and nights are in comfort zone. In April, days are hot and nights are in comfort zone. In May, June, July, August, September, and October both days and nights are hot. Eventually, in November, days are hot and nights are in comfort zone. Therefore, throughout the studied area, all the structures especially living rooms are designed in north-south direction in order to profit from the sea breezes.