عنوان مقاله [English]
In this study, Weather Severity Index, to evaluate thermal comfort conditions in northwest of Iran (province of West Azerbaijan, East Azerbaijan, Ardabil, Zanjan and Kurdistan) during the cold period of year were used. For this purpose, the average daily temperature data over a 10-year period in 22 synoptic stations with more complete statistical period were used. Months the average temperature less than 18 ° C , as were the cold months . According to this criterion , 7 months ( three months in the fall , winter and early spring quarter ) in the area known as the cold months . Using the results of Weather Severity Index, comfort zoning maps were prepared for the North West region. The results showed that general area for much of the year with the cold face. It also became clear that Weather severity, with height has a direct relationship because the cold temperature will be higher altitude. Way that places like Bijar and Zarina Obato climate almost all year comfort far. The result of this study shows that 13 % of the total area under cold air away from difficult circumstances or in other words the state is moderation. While 87 per cent of the difficult conditions prevailing in the cold months is a bit hard to very hard level is observed.