the weather in Thailand is generally hot and humid across most of the country throughout most of the year. While Thailand’s seasons are generally divided into the hot season, cool season, and rainy season, May the weather is mostly dry and the cool season and hot season occur from November to February and March to May respectively. The other inland season, the rainy season, lasts from May to November and is dominated by the southwest monsoon, during which time rainfall in most of Thailand is at its heaviest.