The coastal low is drawing down dry air from the north and that will be the dominating feature for the entire weekend with sunshine and temperatures just a few degrees under normal which is in the low to mid 80s.
The weekend looks terrific with no serious issues through Sunday and probably through Monday afternoon. A northeast wind will keep things cooler along the coast. Other than passing clouds we will have a good deal of sunshine all weekend long. This will be the 5th nice weekend in a row.
Im thinking that we can stretch this nice weather through Monday before the next cold front approaches. Thunderstorms could reach all of Eastern Pennsylvania by Monday evening but should hold off for areas east until late Monday night or Tuesday.
The other nice thing about this weekend is that the humidity will remain low through Sunday. Warm comfortable days and nice nights with cool temperatures inland. Delightful weather for this second weekend in August!