There's nothing like an all-inclusive holiday in Samaná 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 August and September, with an average temperature of 21°C, while the coldest months are January and December, with an average of 20°C. July and January are the driest months, while October and November are the rainiest months.