recognition of isfahan weather types

in order to recognize isfahan weather types in this research 22 variables including temperature precipitation atmospheric humidity and wind were studied in isfahan synoptic station from dey 11th 1339(january 1st 1960) to dey 11th 1383 (december 31st 2004). a cluster analysis on the euclidean distance of standardized matrix of data and linking days on the basis of ward method showed that isfahan has 9 weather types (wt) including: 1.cold frosty calm wt 2.very cold frosty calm foggy wt 3.rainy wt 4.cold frosty dry wt 5.cold windy wt 6.windy wt 7.moderate wt 8.warm dry wt and 9.hot dry wt. based on this research's results hot and dry wt is the most dominant and durable and rainy wt is the least frequent and short lived weather type.