The refreshing airmass that moves overhead the next 48 hours will provide us a couple of great sleeping weather nights and the prospect of some frost in the Poconos or even parts of the Pinelands tonight and tomorrow night before high pressure moves past and a southwest wind sets up late Tuesday into Wednesday. Another "nudge" of warmth is coming at us for Wednesday ahead of a cool front that will push in from the northwest.
This setup is going to bring our next chance of showers to the region as the front slides in, with the best chances looking to be late in the afternoon into Wednesday night. Lingering showers may hold into Thursday before the front slides far enough south to end the shower threat.
It doesn't appear that there will be a threat for severe weather -- a few rumbles of thunder might be about the worst we get out of this -- and given the setup and dynamics with the front it looks like a modest rainfall would be the most likely outcome at this point.
Temperatures ahead of the front may make a run towards 80 on Wednesday afternoon but won't cool terribly much behind the front -- mid 70's look likely for Thursday and Friday afternoon highs around the region. Our pattern really isn't terribly cool nor terribly warm -- it's a seasonal pattern for this time of the year overall.