Weather will likely play an important role when you plan your trip to Tha Sao, but bear in mind that cheaper options are usually available when the weather isn’t as good. The hottest months are usually April and March, with an average temperature of 30°C, while the coldest months are December and January, with an average of 26°C. The rainiest months in Tha Sao are September, October, August and July, with each month seeing an average of 193 mm of rainfall.