According to AccuWeather, Philadelphia is preparing for a significant shift in weather, with colder and cloudier conditions expected to begin tomorrow. Following a period of mild weather, residents should brace themselves for a noticeable drop in temperatures and increased cloud cover, leading to overcast skies throughout the day. This change is part of a larger weather pattern, with cooler air moving in from the north, and the colder temperatures are expected to persist for several days, potentially impacting outdoor activities. Local weather experts recommend dressing in layers and taking precautions to stay warm.