A wave of energy will be moving through the region tonight. Consequently, we'll have to deal with intermittent rain showers all night long. Cooler air has been slowly working in today, and it will continue to do so tonight, so we'll end up dropping into the upper 30s for a low in Philadelphia. North and west of Trenton, where temperatures will be hugging the freezing mark, is where some frozen precipitation could mix in, in the form of snow, sleet, or freezing rain, so if you'll be traveling early tomorrow morning in places like Allentown or Reading be sure to use extra caution on the roads.
On and off rain showers will continue during the day on Wednesday. High temperatures will generally be in the 40-45 range across the area, so I'm not expecting any frozen precipitation during the daylight hours. However, another wave of energy will work through Tuesday night into Wednesday. This particular wave will have colder air to work with, so snow will be possible across the Lehigh Valley and the Poconos. We're not expecting much in the way of accumulation, but don't be surprised if you see a coating to an inch or two of snow on the ground in the northern/western suburbs by Wednesday afternoon. For the city and points south/east, all rain is expected.
Once we get through Wednesday, the rest of the week and into the weekend looks great. It'll be a little chilly on Friday, but by Sunday we could be flirting with 50 degrees again. By next week, much colder air will arrive in the Delaware and Lehigh Valleys, and that 35 degree high on Monday may even need to be brought down.
7 AM 38 degrees, Rain Showers On & Off
Noon 41 degrees, Rain Showers On & Off
3 PM high 43 degrees
5 PM 41 degrees, Cooler
Sunrise 7:21 AM
Sunset 5:01 PM