There's nothing like an all-inclusive holiday in Nanao 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 August and July, with an average temperature of 24°C, while the coldest months are February and January, with an average of 5°C. February and January are the driest months, while July and September are the rainiest months.