Weather is probably a major factor when you plan your trip to Khao Sam Yot, 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 31°C, while the coldest months are December and January, with an average of 26°C. The rainiest months in Khao Sam Yot are September, August, October and July, with each month seeing an average of 223 mm of rainfall.