yeah its not the worst I've seen here. During the summers when it gets really hot around 100F (37C) and a big cold front comes through it routinely drops temps into the lower 70's and sometimes even the lower 60's (15-21C).
One time I was at a Cardinals baseball game sitting in the upper deck as usual and a storm came through. The game started it was in the mid 90's and muggy really hot, very uncomfortable. Then the giant blast of cold air came that always comes before a big storm down here, the wind picked up threw stuff around and it started to pour. By the time I got home after the game turned on the weather channel and it was 60F outside. lol crazy.