There's nothing like an all-inclusive holiday in Khwai to refresh you, especially when you know what kind of weather to expect. Here's some information to help you decide when to book: The hottest months are usually October and November, with an average temperature of 27°C, while the coldest months are July and June, with an average of 19°C. August and July are the driest months, while January and February are the rainiest months.