For tonight, skies will turn mostly cloudy and remaining humid. An isolated show or thunderstorm is possible, especially to the north and west. Lows in the Philadelphia metro will be around 71-degrees, with temperatures dipping into the upper 60's to the north and west and sticking in the mid-70's the further south you travel. Winds will remain from the south at 5 to 10 mph. For Saturday, partly to mostly cloud and remaining humid. Scattered showers and thunderstorms will start to form in the afternoon and may be severe. The main threat seems to be the same as it was all summer, being high winds, medium to large hail and torrential downpours. High temperatures will be around the mid-80's throughout the area with slightly stronger winds from the south at 5 to 15 mph.
After Saturday, Sunday rebounds very nicely, becoming the obvious star of the weekend. Highs only in the mid to upper 70's and lows in the upper 58's. Take out those air conditioners and open the windows! Cooler for the start of the work week, with temperatures in the mid-70's for highs and mid-50's for lows. For Tuesday, temperatures right at their normal values, not dropping below the 80-degree line and down in the 70's. For the rest of the week, temperatures will be in the lower 80's, with low humidity. Brilliant sunshine will dominate the daylight hours and mostly clear skies at night will let the lows drop into the lower to mid-70's.