Temperatures will no longer remain above average as a low pressure system moves in late tonight into Tuesday morning bringing colder temperatures. The cold front will bring snow for western portions of the state, while central and eastern Pennsylvania will experience some rain. The temperatures will remain well below average following the frontal passage. On Wednesday, northwestern portions of Pennsylvania could see some scattered snow showers in the early morning hours, while the rest of the state will have clear skies and low temperatures. A high pressure system moves across the state during the day Wednesday, bringing cold, dry air. Throughout the day on Thursday, the Commonwealth will experience overcast skies and lingering low temperatures with clearing overnight. Friday will be partly cloudy throughout the northwestern portion of the region, but clear for the rest of the state. By Saturday, the state will see sunny skies, but temperatures will still remain below average for the season.