First things first, when is the wet season in Thailand? The rainy season in Thailand varies depending on the region and is influenced by the monsoon.
Thailand enjoys a tropical climate, which means it’s pretty warm all year round. However, there are two distinct seasons: dry and wet.
In Northern Thailand, the wet season is from November to February and sometimes includes March and May. Even though the northeast monsoon doesn’t directly affect the northern area of Thailand, the country sees relatively higher temperatures, with an occasional cooling breeze.
The other northern season is dominated by the southwest monsoon, lasting from May to November. During that time, rainfall is at its heaviest in the north.