The heat of the earth is provided by sunshine radiation. A change in the angle of sunshine radiation and the surface of Earth, the height and distance of the Sun from the Earth causes changes in ambient temperature. Sometimes these changes will reduce climatic comfort for human beings. Climatic comfort is established when there is a balance between excreted and absorbed temperature by the skin of the body. Orientation of the physic of the squares to geographic north causes changes in the received amount of direct sunshine radiation in different months. Thus the establishment is appropriate in some orientations and inappropriate in others. The inappropriate orientation of the physic in most squares of the city of Yazd reduces the climatic comfort of the citizens. In this study, the correlation coefficient was used and the difference between the different orientations regarding the amount of getting sunshine radiation was calculated using the software R. Calculations were based on a fixed rectangle in the eight cardinals and intercardinal orientations during the year and have been compared with each other in terms of climatic comfort. According to the results, north-south orientation is the most desirable orientation in the whole year for the physic of squares in Yazd. Getting close to the east-west orientation reduces the desirability. The difference in getting sunshine radiation between the orientations is quite significant. This study shows that using the north-south orientation or orientations near it for the physic of squares in Yazd, increases climatic comfort of the citizens.
