Philadelphia is preparing for a rainy weekend as a low-pressure system is expected to bring persistent rain to the region, starting Friday evening and continuing through Sunday. The National Weather Service forecasts steady rainfall, with heavier showers anticipated, especially on Saturday. Despite the wet weather, temperatures will remain mild, with daytime highs around 60°F (15°C) and nighttime lows near 50°F (10°C). Moderate winds, ranging from 10 to 15 mph, are also expected, potentially impacting outdoor activities.