Yeah but most of Burlington's weather crosses over Champlain first, probably accounting for Burlington's cloudiness, and Jay Peak's snowiness.
Not all of Vermont is like that. I bet the air dries considerbly by the time it gets down into the NEK. Foehn winds and all that.
Plus VT is very cloudy in, say, late October, November, December, etc. This explains the statistic (source???). It is NOT normally cloudy during the summer months. As you have seen, up here in NNE this has been far from a normal summer. There has been no summer.