tiếng anh Calculation results showed, the increasing rate of annual temperature averaged over Tay Nguyen region was about 0.6°C during the past 50 years. In which, the increasing rate of the dry season was as nearly twice as that of the rainy season. The rainfall of both rainy and dry seasons has been increasing which mainly made the annual total rainfall increase by about 10 percent during the past 50 years. Referring to the climate extreme events calculated from daily temperature and rainfall, there were an increasing rate of most indices. Especially, climate extreme indices related to the hight threshold were increasing faster. On the other hand, climate extreme events referred to rainfall showed the increasing rate in terms of both the number of days and amount.