This year rainy season started early, and it rained a lot in May as well as June, then the rest of rainy season seemed a lot less rainy. You just never know...this is Mother Nature we're talking about!
In 2010 we came for two weeks in May. Had hardly any rain the entire time, except for one crazy day when it rained 11"! That is NOT normal, though.
Lobsterfest is in June and is a lot of fun, so that's something else to consider.