Saturday was probably one of the Top 10 days we'll ever have this Summer! Sunshine, some fair weather cumulus in the afternoon once we reached our convective temperature(the estimated temperature that the surface must warm to for clouds to develop), and a light breeze propelled the high at Philly International to 84 this afternoon after a low of 62 this morning.
Overnight it will remain clear with lows in the middle 60s; this will lead to sunshine to start off Sunday, but then there will be higher clouds moving in ahead of a frontal boundary. Highs will be in the middle 80s with a southerly wind around 10-15mph. There may be some rain north and west by the afternoon, but for the most part it shall stay dry.
Late Sunday night into early Monday morning there will be rain heavy at times with lows in the lower 60s as the frontal boundary pushes eastward. Highs on Monday will be in the upper 70s and we stay overcast through the overnight into Tuesday with yet another area of low pressure riding along the boundary(but we should stay dry for the most part). It's gone by Wednesday, but a more potent cold front arrives in the evening with daytime highs in the lower 80s. The front stalls on top of us for Thursday and Friday with highs in the upper 70s to lower 80s.
You can check out the rest of the 7-day forecast(any time) at www.scottderekwx.com/forecast.html.