Areas around Philadelphia will soar into the 70's once again on Sunday, but I think Skook will be protected from the craziest warmth once again. Still, I think 50s and 'perhaps' low 60s are possible for us which will be historical nonetheless.
Rain showers will be around more on Sunday which may turn into a regular rainfall for a few hours later. Cold air slowly works in Monday and it'll be nice and cold in time for Christmas Eve.
One outside possibility (just about 25% chance at this point) is for a weak system to form & bring us a light round of light snowfall Christmas Eve. Low possibility now but would be par for the course for what has been a crazy December of extremes.