[GoNative]

One thing to note about Hokkaido in June is that it's a hell of a lot cooler than down Tokyo way. Expect the nights to still be getting down close to 10 degrees celcius (50 F) especially around Furano. Days should be nice up around the high teens to low 20's (mid 60's to mid 70's F, sometimes higher). June is not normally an overly wet month but it can still be very cloudy and feel quite cool. So make sure you have a jacket packed for when you head up north.