Climate It is one of the most complex Natural devices known on Earth. This device is composed of various elements and components along with their interaction. The result of the action and reaction of these elements and climatic components is the formation of various climatic phenomena. One of the climatic phenomena that has received little attention in Iran and the world is the sultry phenomenon. Therefore, the view and purpose of this study is to analyze and evaluate the effect of climate on human physiological comfort and convenience under the influence of sultry phenomenon. The research is of applied type which has been done by descriptive-analytical method. The data used include average minimum, maximum and daily temperature, relative humidity, precipitation, steam pressure and dew point temperature in the statistical period of 40 years(1979-1979). For data analysis, indices of sampling intensity, partial steam pressure and sampling degree have been used. The study area in this research is the city of Rasht in Gilan province. The results indicate the greater effect of temperature element in establishing thermal comfort and the irreplaceable role of water vapor pressure and dew point temperature in construction physics. Despite the low relative humidity in June, July, August and September, the amount of sultry and the most heat disturbance is seen in these months, and August has the most severe amount of sultry. In order to establish thermal comfort, in addition to creating shade, natural air conditioning is also needed, and in this regard, solutions have been provided.
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