There's nothing like an all-inclusive holiday in Na Mueang to revive you, especially when you know what to expect from the elements. Here's some information to help you decide when to book: The hottest months are usually May and June, with an average temperature of 29°C, while the coldest months are January and February, with an average of 27°C. February and June are the driest months, while November and October are the rainiest months.