Rain will be creeping closer and closer. It's not such a bad thing to see the rain... but what will follow the rain will really chill you to the bone. Daytime highs will swing from 70+ all the way down to 50 or a little cooler. We could also be talking about lows in the low 30s by the end of the week.
There you see the next front coming into the region. This will cause the shake-up in the weather department.