Weather is probably a major factor when you plan your trip to Khao Kho, 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 28°C, while the coldest months are December and January, with an average of 24°C. The rainiest months in Khao Kho are August, July, May and September, with each month seeing an average of 450 mm of rainfall.