Thailand has some of the unique and best travel destination in Southeast Asia. Its white sandy beaches are one of them. In Thailand cool season runs from November to the end of February. With its low humidity, relatively low temperatures and clear skies, the cool season is the best time to visit. April and May are the hottest months. Avoid the rainy season just in case you don’t like the rain. Normally January, February and March are dry and sunny months, and these months are called a peak tourist season.