There’s nothing like an all-inclusive holiday in Trân Châu to rejuvenate you, especially when you know what kind of weather to expect. Here’s some information to help you choose when to book: The hottest months are usually July and June, with an average temperature of 28°C, while the coldest months are January and December, with an average of 19°C. February and December are the driest months, while August and July are the rainiest months.