Vietnam has a monsoon-influenced climate typical of that of mainland Southeast Asia. The diverse topography, long latitude (Vietnam spans over 15° of latitude), and influences from the South China Sea lead to climatic conditions varying significantly between regions. Vietnam is a country located in the tropics, however Northern Vietnam, including Hanoi, is considered a subtropical region by Köppen climate classification and has times to be influenced by cold waves from the Northeast. Cold waves also influence northern part of Central Vietnam. In general here, Vietnam is divided into 2 parts/Northern-Southern by determination about climate-weather. The northern region experiences a monsoonal and warm temperate climate (Cwb) with four distinct seasons (spring, summer, autumn, and winter) wh