High pressure builds in for early Sunday.  Sunny skies in the morning after a cold start.

Sunday afternoon, low pressure begins to approaches from the southwest as a weak cold front sinks south.  Clouds move in between 2 and 4 PM Sunday afternoon.
High temp 60.8° sd  1.4°
Some light showers possible Sunday evening.

For Monday…

Right now, the GFS keeps the low pressure scooting out to our south with only very light showers Sunday evening and Monday in Philadelphia. (South Jersey and Delaware will have some rain Monday.)  Other models have a bit more rain for Monday here in Philadelphia.  Will have to wait and see.