Thursday will see cooler than average temperatures across the Commonwealth, with cloudy skies generally prevailing. Friday will heat up a bit to near seasonable conditions, but showers are possible, with precipitation likely on and off as the day goes on. Looking towards the weekend, the start of a heat wave is looking increasingly likely. A rainy system is looking to invade Saturday night into Sunday morning, but temperatures will continue to rise. As for the early part of next week, temperatures could max out as much as 15 to 20 degrees above average before a front moves through, bringing precipitation and slightly cooler temperatures.