Weather is probably a major factor when you plan your trip to Rong Kham, 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 January and December, with an average of 25°C. The rainiest months in Rong Kham are September, July, August and May, with each month seeing an average of 285 mm of rainfall.