There’s nothing like an all-inclusive holiday in Tawang to refresh you, especially when you know what to expect from the elements. Here’s some information to help you choose when to book: The hottest months are usually July and June, with an average temperature of 10°C, while the coldest months are January and February, with an average of -4°C. December and January are the driest months, while July and August are the rainiest months.