Thailand’s weather is most affected by the monsoon. The word “monsoon” comes from the Arabic word “Mausim”, meaning “season” or “the season of wind”. And nowadays monsoon is the term used for the seasonal shift in wind direction which usually brings on a different season of weather. Monsoons are characterized by their seasonality, geographical preference, and strength. Monsoon rain and winds are the end results of heating patterns produced by the sun and the distribution of land mass and ocean body (Prakhammintara, 2007).