The majority of the south as well as the eastern tip of the east have a tropical monsoon climate. Parts of the south also have a tropical rainforest climate.
A year in Thailand is divided into three seasons:
The first is the rainy or southwest monsoon season, which is caused by southwestern wind from the Indian Ocean.
Most of Thailand experiences dry weather with mild temperatures. Summer or the pre–monsoon season runs from mid–February until mid–May.
Due to their inland position and latitude, the north, northeast, central and eastern parts of Thailand experience a long period of warm weather, where temperatures can reach up to 40 °C during March to May, in contrast to close to or below 0 °C in some areas in winter.
Southern Thailand is characterised by mild weather year-round with less diurnal and seasonal variations in temperatures due to maritime influences. It receives abundant rainfall, particularly during October to November.
Thailand is among the world’s ten countries that are most exposed to climate change. In particular, it is highly vulnerable to rising sea levels and extreme weather events.
