u/Constant_Bee937

Hi i am planning to bring my wife and baby (currently 3months old) for a 12-14 days Hokkaido trip. i have been doing research and reading comments, and finally decided to either start from late June or late September. We will be doing self-drive with mid-size campervan. Which window will be most suitable in our case? We want to avoid crowds and tourists, as well as experience Hokkaido as much as possible during a period of lowest possibility of rain. also what is the average temperature during the day if we start from late June?