There is some good news, but then some bad news; lets start with the good first....
Or average high and low at Philly International has since bottomed out and now is on the upswing! The average high now is 41 while the average low is 26, but on Monday we reached a high of 46 just after noon(12:07pm to be exact!)before a cold front came through and dropped temperatures back before sunset.
The bad news is now colder air has returned and will stick around for the next few days; overnight lows will be on either of 10 with a clear sky and a northwest wind between 10-15mph making the wind chill below zero. This will lead to a very frigid Tuesday despite plenty of sunshine as highs struggle to make it over the middle teens with a continued northwest wind. Now the cold front I mentioned before will spawn a new low along the Carolinas on Tuesday and since it's cold enough along the East Coast there will be some potentially heavy snow down there; what this means for us is nothing but some clouds overnight Tuesday into Wednesday morning with some light snow possible south and east(1-2" in Atlantic and Cape May counties in NJ, Kent and Sussex Counties in DE). The cloud cover will prevent us from getting too cold, but still with a low in the middle teens is not a walk in the park(it's still ten degrees below average!).
Wednesday after some morning clouds will be sun-filled with highs in the lower 20s. We will finally start saying goodbye to this Arctic air and saying hello to a more zonal flow(cold air to the north, warm air to the south; were in between); granted we are still in an active pattern with clipper systems pushing every couple of days at least now they will be a rain/snow mix(rain south, snow north). Thursday's dry with highs just above freezing, but Friday will feature some light rain with highs around 40.
You can see the rest of the seven day forecast(in pictures) any time at www.scottderekwx.com/forecast.html.