Do you have outdoor "stuff" to do this weekend? I would advise you take care of the outdoor acitivities on Saturday, since Sunday looks to be rather soggy.
High pressure will slide through on Saturday, so expect plenty of blue sky and sunshine, with brisk temperatures ranging mostly in the 40s to around 50. As an area of low pressure tracks our way, look for increasing clouds Saturday night with a chance of showers and even some wet snowflakes late Saturday night. A warm front moving through Sunday will bring some showers, with a cold front pushing through on Monday bring additional showers. The good news: despite the lack of sunshine, southerly breezes will bring some fairly mild air into Maine with highs in the 50s Sunday, and 60s on Monday.
Whatever the weather brings, hope your weekend is great!