While you were asleep: It got real chilly

Temperatures dipped into the low 40s overnight, and hovered near freezing in the Poconos, bringing frost to many areas and effectively ending the growing season for some crops in farms and gardens around the area, according to the National Weather Service in Mount Holly.

At 4:30 a.m. this morning it had dropped to about 34 degrees at Allentown Lehigh Valley International Airport.  In Philadelphia, it was 44.  In some areas, it is expected to run almost 10 degrees below normal for October.

The culprit for the unseasonably cold weather: A low pressure system spreading over the Ohio Valley and Mid-Atlantic region. The Weather Service says the plunge is enough to kill off sensitive crops.

The forecast for today calls for mostly sunny skies with a high of 54.  But temperatures will drop to about 37. 

Friday, Saturday, Sunday and Monday look to be almost the same, with highs and lows only varying by a few degrees.

A high pressure system moving in should continue the sunny skies but push highs into the low 60s.