Yes, after a tranquil week there are changes coming. We'll still be warm today with afternoon temperatures in the mid to upper 70s. Saturday will be even a bit warmer, around 80 degrees; but a cold front will move through the region and wipe out those temperatures. The front will also spawn scattered showers and may trigger a few thunderstorms Saturday afternoon and evening. Sunday will be considerably cooler with highs just in the mid 60s. So you may need the AC on Saturday, and then the heater on Sunday.