Weather is probably a major factor when you plan your trip to Kep, but bear in mind that cheaper options are usually available when the weather isn’t as good. The hottest months are usually March and April, with an average temperature of 28°C, while the coldest months are January and December, with an average of 26°C. The rainiest months in Kep are September, July, October and June, with each month seeing an average of 285 mm of rainfall.