Weather will likely play an important role when you plan your trip to Cu Lao Dung, but bear in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually April and May, with an average temperature of 29°C, while the coldest months are January and December, with an average of 26°C. The rainiest months in Cu Lao Dung are October, September, July and June, with each month seeing an average of 284 mm of rainfall.