There's nothing like an all-inclusive holiday in Jomsom to revive 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 June and May, with an average temperature of 21°C, while the coldest months are January and February, with an average of 12°C. November and December are the driest months, while July and August are the rainiest months.