No that is not normal. There are a few things that are important about AC. If you are in an area of high humidity an air conditioner needs to remove the water from the air (and everything else in your coach such as bedding walls etc.) before it can lower the temperature below the dew point. If the humidity is at 95% at 90 degrees the AC must remove the excess humidity from the air before the temperature can drop. The hot humid air hits the cold coils and condenses out. This is why it is bad practice to open windows and doors in the evening to cool off a coach or house. All that humidity comes right back. Then the AC needs to start over again removing the moisture,