Overnight snow fell through the Lehigh Valley and Berks County, with a rain-to-snow mix near some of Philadelphia's suburbs.

As had been forecasted, the rain-snow line quickly pushed north through the early morning hours as warmer air wedged into the region following a warm front.

As temperatures quickly boosted above freezing from south to north, all precipitation in the region switched to rain. This happened by around 6 a.m. in most places. From 3 to 6 a.m., some precipitation fell as freezing rain in the Lehigh Valley and Berks County, leading to ice along roadways.

Rain will completely move out of the region by the early afternoon. But the bulk of rain near Philadelphia will weaken by 8 to 10 a.m.

Through the rest of the day, temperatures will continue to climb to above-average marks. Throughout much of the area, highs will reach the low 50s. These temperatures will be considerably warmer than the upper 30s seen as highs over the last three days.

In the days to come, some lake effect moisture may edge into the Lehigh Valley. Otherwise, the region stays dry and temperatures become more moderate in the 40s.

By Thursday through Friday, the coldest air of the season moves in. Wind chill, or "feels like" temperatures, may fall to below 0 degrees due to higher winds by Friday morning. The forecast lows drop to the teens.

Here's what to expect for the rest of the week:

Monday: Rain showers through the morning, then cloudy. High 51.

Tuesday: Partly cloudy. High 44.

Wednesday: Mostly cloudy. An isolated snow shower north of Philadelphia. High 42.

Thursday: Bitterly cold winds. High 26.

Friday: Dangerously cold morning wind chill temperatures. Mostly sunny and bitterly cold through day. High 23.