Weather will likely play an important role when you plan your trip to Kaoh Sdach, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually May and April with an average temp of 83°F, while the coldest months are January and December with an average of 81°F. The rainiest months in Kaoh Sdach are September, July, August, and June, with each month seeing an average of 25 inches of rainfall.