Showers will be possible throughout PA today, though precipitation will be scattered and light.  Overnight, temperatures will drop, meaning rain will likely change to snow in the North and West of the Commonwealth, though there will be very little accumulation.  Precipitation elsewhere should remain as rain.  Sunday will be unseasonably chilly, with temperatures failing to get out of the 40s in most areas, with only the extreme Southeast likely to break 50.  The early part of next week will see temperatures warm up to more seasonable levels, with conditions remaining dry and pleasant for most of PA.  A few lake effect rain showers cannot be ruled out in the Northwest, though.