There's nothing like an all-inclusive holiday in Sop Ruak 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 April and March, with an average temperature of 27°C, while the coldest months are January and December, with an average of 20°C. February and March are the driest months, while August and July are the rainiest months.